Štefan Baňas, Filip Benko, Michal Ďuračka, Norbert Lukáč, Eva Tvrdá
This study examined the effects of three selected doses of kaempferol (KAE; 12.5, 25 or 50 μM) on bovine sperm motility and oxidative profile directly related to cold storage. We also elucidated the effect of KAE on the expression profiles of heat shock proteins (HSPs) 70 and 90 as well as the pro-apoptotic BCL2-associated X (BAX) protein and the anti-apoptotic B-cell lymphoma 2 (Bcl-2) protein. Frozen samples supplemented with KAE were compared with a native control (fresh spermatozoa) and a cryopreserved control, frozen in the absence of KAE. Our results demonstrate that the administration of all KAE doses led to a higher degree of sperm motility (p < 0.05) when compared with the cryopreserved control. The highest levels of protection of sperm DNA (p < 0.05), lipids (p < 0.05) and proteins (p < 0.05) were detected in samples exposed to 25 μM KAE when compared with samples frozen without KAE. Administration of 25 μM KAE led to a significant increase in HSP70 and HSP90 (p < 0.05) when compared with the unsupplemented frozen control. No significant differences were observed in the expression patterns of BAX; however, a significant up-regulation of Bcl-2 protein was observed in the frozen samples enriched with 25 μM KAE when compared with the cryopreserved control (p < 0.05). In summary, we may consider KAE as an effective agent in stabilizing the sperm membranes by preventing reactive oxygen species (ROS) overproduction in the mitochondria and subsequent oxidative damage to molecules critical for a proper sperm architecture and function. These protective properties of KAE may lead to higher post-thaw sperm activity and viability.
{"title":"Kaempferol Enhances Sperm Post-Thaw Survival by Its Cryoprotective and Antioxidant Behavior","authors":"Štefan Baňas, Filip Benko, Michal Ďuračka, Norbert Lukáč, Eva Tvrdá","doi":"10.3390/stresses3040047","DOIUrl":"https://doi.org/10.3390/stresses3040047","url":null,"abstract":"This study examined the effects of three selected doses of kaempferol (KAE; 12.5, 25 or 50 μM) on bovine sperm motility and oxidative profile directly related to cold storage. We also elucidated the effect of KAE on the expression profiles of heat shock proteins (HSPs) 70 and 90 as well as the pro-apoptotic BCL2-associated X (BAX) protein and the anti-apoptotic B-cell lymphoma 2 (Bcl-2) protein. Frozen samples supplemented with KAE were compared with a native control (fresh spermatozoa) and a cryopreserved control, frozen in the absence of KAE. Our results demonstrate that the administration of all KAE doses led to a higher degree of sperm motility (p < 0.05) when compared with the cryopreserved control. The highest levels of protection of sperm DNA (p < 0.05), lipids (p < 0.05) and proteins (p < 0.05) were detected in samples exposed to 25 μM KAE when compared with samples frozen without KAE. Administration of 25 μM KAE led to a significant increase in HSP70 and HSP90 (p < 0.05) when compared with the unsupplemented frozen control. No significant differences were observed in the expression patterns of BAX; however, a significant up-regulation of Bcl-2 protein was observed in the frozen samples enriched with 25 μM KAE when compared with the cryopreserved control (p < 0.05). In summary, we may consider KAE as an effective agent in stabilizing the sperm membranes by preventing reactive oxygen species (ROS) overproduction in the mitochondria and subsequent oxidative damage to molecules critical for a proper sperm architecture and function. These protective properties of KAE may lead to higher post-thaw sperm activity and viability.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135387679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heavy metal (HM) stress poses a global risk to crops, ecological systems, and human health. It disrupts cellular ionic equilibrium, cell membrane integrity, metabolic balance, and the activities of enzymes and proteins, severely impacting physiological processes, plant development, and agricultural productivity. Although plants naturally activate defense mechanisms to mitigate the adverse effects of HM stress, they cannot completely prevent them. Phytohormones counter HM toxicity, aiding growth. External application and internal regulation via signaling/biosynthesis genes offer defense against HM-induced damage. A pivotal signaling molecule in plant adaptive responses to environmental stressors, including HM toxicity, is abscisic acid (ABA). Despite ABA’s role in abiotic stress responses such as drought and salinity, its function and crosstalk with other phytohormones under HM stress remain poorly understood. Nonetheless, exogenously applied ABA serves as a strategic approach to enhancing plants’ resistance to HM toxicity by promoting osmolyte accumulation and reinforcing antioxidant activity. ABA significantly regulates various plant growth and metabolic activities under diverse environmental conditions. This review highlights the effects of HM stress on plants and explores ABA involvement in production, signaling, catabolism, and transport within plant tissues. The purpose of this paper is to shed light on the complex interplay between the metabolism of ABA, its signaling, and its interactions with other phytohormones (e.g., auxins, gibberellins, and ethylene) during HM exposure. Furthermore, we delve into the function of ABA to mitigate HM stress and elucidate its interactions with other phytohormones.
{"title":"Abscisic Acid: Metabolism, Signaling, and Crosstalk with Other Phytohormones under Heavy Metal Stress","authors":"Ambreen Bano, Kratika Singh, Surendra Pratap Singh, Pooja Sharma","doi":"10.3390/stresses3040046","DOIUrl":"https://doi.org/10.3390/stresses3040046","url":null,"abstract":"Heavy metal (HM) stress poses a global risk to crops, ecological systems, and human health. It disrupts cellular ionic equilibrium, cell membrane integrity, metabolic balance, and the activities of enzymes and proteins, severely impacting physiological processes, plant development, and agricultural productivity. Although plants naturally activate defense mechanisms to mitigate the adverse effects of HM stress, they cannot completely prevent them. Phytohormones counter HM toxicity, aiding growth. External application and internal regulation via signaling/biosynthesis genes offer defense against HM-induced damage. A pivotal signaling molecule in plant adaptive responses to environmental stressors, including HM toxicity, is abscisic acid (ABA). Despite ABA’s role in abiotic stress responses such as drought and salinity, its function and crosstalk with other phytohormones under HM stress remain poorly understood. Nonetheless, exogenously applied ABA serves as a strategic approach to enhancing plants’ resistance to HM toxicity by promoting osmolyte accumulation and reinforcing antioxidant activity. ABA significantly regulates various plant growth and metabolic activities under diverse environmental conditions. This review highlights the effects of HM stress on plants and explores ABA involvement in production, signaling, catabolism, and transport within plant tissues. The purpose of this paper is to shed light on the complex interplay between the metabolism of ABA, its signaling, and its interactions with other phytohormones (e.g., auxins, gibberellins, and ethylene) during HM exposure. Furthermore, we delve into the function of ABA to mitigate HM stress and elucidate its interactions with other phytohormones.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136096677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dinh Tri Bui, Ngoc Minh Truong, Viet Anh Le, Hoang Khanh Nguyen, Quang Minh Bui, Van Thinh Pham, Quang Trung Nguyen
The research centers around ST25, a recently acclaimed rice variety lauded as Vietnam’s premier offering. However, its ability to substantiate its origin is impeded by the rampant proliferation of counterfeit derivatives within the market. A distinctive methodology is posited herein, intertwining the attributes of Fourier Transform Infrared Spectroscopy (FTIR) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) analyses, augmented using Principal Component Analysis (PCA). The primary objective is to meticulously ascertain the unadulterated geographic provenance of the ST25 rice cultivar. The findings unequivocally underscore the emergence of a conspicuous taxonomy within the ST25 rice samples sourced from Soc Trang, underpinned by the utilization of both FTIR and ICP-MS datasets. Remarkably, the discernment of eight elemental constituents (27Al, 59Co, 44Ca, 57Fe, 60Ni, 63Cu, 93Nb, and 98Mo) has been adjudicated as pivotal in ascribing geospatial classification. The ramifications of this proposed modality encompass not only the authentication of the subject rice variety but also extend to the validation of similar grain types. Functioning as a potent deterrent against the omnipresent specter of food counterfeiting within the market milieu, this methodology occupies a pivotal niche.
{"title":"Preserving the Authenticity of ST25 Rice (Oryza sativa) from the Mekong Delta: A Multivariate Geographical Characterization Approach","authors":"Dinh Tri Bui, Ngoc Minh Truong, Viet Anh Le, Hoang Khanh Nguyen, Quang Minh Bui, Van Thinh Pham, Quang Trung Nguyen","doi":"10.3390/stresses3030045","DOIUrl":"https://doi.org/10.3390/stresses3030045","url":null,"abstract":"The research centers around ST25, a recently acclaimed rice variety lauded as Vietnam’s premier offering. However, its ability to substantiate its origin is impeded by the rampant proliferation of counterfeit derivatives within the market. A distinctive methodology is posited herein, intertwining the attributes of Fourier Transform Infrared Spectroscopy (FTIR) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) analyses, augmented using Principal Component Analysis (PCA). The primary objective is to meticulously ascertain the unadulterated geographic provenance of the ST25 rice cultivar. The findings unequivocally underscore the emergence of a conspicuous taxonomy within the ST25 rice samples sourced from Soc Trang, underpinned by the utilization of both FTIR and ICP-MS datasets. Remarkably, the discernment of eight elemental constituents (27Al, 59Co, 44Ca, 57Fe, 60Ni, 63Cu, 93Nb, and 98Mo) has been adjudicated as pivotal in ascribing geospatial classification. The ramifications of this proposed modality encompass not only the authentication of the subject rice variety but also extend to the validation of similar grain types. Functioning as a potent deterrent against the omnipresent specter of food counterfeiting within the market milieu, this methodology occupies a pivotal niche.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractQuenching plays an important role in the material processing. Water impingement jet quenching involves phenomena such as nucleate boiling, Leidenfrost effect, rewetting, etc. Stronger thermal gradients could induce cracks in the material. Thermal boundary conditions of the process depends on temperature, space, time, and material discontinuity. This study mainly focuses on the thermal modeling of moving water jet quenching of semi-solid hot vertical aluminum plate with latent heat release during the solidification by using Peridynamics (PD). The obtained thermal profile is compared with the infrared camera’s thermal field data to identify the boiling curve parameters on the cracked plate. The PD model with the incorporation of cracking dynamics is giving agreeable results with the experimental thermal field. Modeling quenching heat transfer using PD will enhance the coupling of hot tear origination and propagation simulation, which is quite challenging with other numerical methods. The application of PD in quenching heat transfer with phase change is the first of its kind. The advantages and limitations of the peridynamic approach for this problem is critically evaluated and the simulated results are compared with the experimental measurement of temperature profiles.Keywords: Hot cracksperidynamicsphase changequench heat transferquenchingsemi-solid state AcknowledgmentsThe authors express their gratitude to Dr. Nyein Nyein Linn (AIRTF scholar) who came from Myanmar for the short-term research training at NIT-T. We express our sincere thanks to the project students Manu Aatitya R P, Yogeesh S, and Sriranga V who helped us to develop the PD code in MATLAB.Authors’ contributionsJijo Prasad Jayaprasad Remani: Writing – Original Draft, Methodology, Investigation, Formal analysis, Visualization, Software, Validation.Saravanakumar Palanisamy: Experimental measurement and observations, Software, Validation.Ashok Kumar Nallathambi: Supervision, Conceptualization, Writing – Review & Editing, Project administration, Software.Selda Oterkus: Peridynamic formulation of heat transfer – Methodology.Daniel Juhre, and Eckehard Specht: Experimental measurement and observations – Resources, Investigation.Data availability statementThe raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work is financially supported by the Science and Engineering Research Board (SERB-DST), India under the project SRG/2019/001463. OvGU Magdeburg, supported for the scholar’s experimentation under funding GRK 1554.
{"title":"Peridynamic simulation of heat transfer during quenching of semi-solid plate with occurrence of hot cracks","authors":"Jijo Prasad Jayaprasad Remani, Saravanakumar Palanisamy, Ashok Kumar Nallathambi, Selda Oterkus, Daniel Juhre, Eckehard Specht","doi":"10.1080/01495739.2023.2253856","DOIUrl":"https://doi.org/10.1080/01495739.2023.2253856","url":null,"abstract":"AbstractQuenching plays an important role in the material processing. Water impingement jet quenching involves phenomena such as nucleate boiling, Leidenfrost effect, rewetting, etc. Stronger thermal gradients could induce cracks in the material. Thermal boundary conditions of the process depends on temperature, space, time, and material discontinuity. This study mainly focuses on the thermal modeling of moving water jet quenching of semi-solid hot vertical aluminum plate with latent heat release during the solidification by using Peridynamics (PD). The obtained thermal profile is compared with the infrared camera’s thermal field data to identify the boiling curve parameters on the cracked plate. The PD model with the incorporation of cracking dynamics is giving agreeable results with the experimental thermal field. Modeling quenching heat transfer using PD will enhance the coupling of hot tear origination and propagation simulation, which is quite challenging with other numerical methods. The application of PD in quenching heat transfer with phase change is the first of its kind. The advantages and limitations of the peridynamic approach for this problem is critically evaluated and the simulated results are compared with the experimental measurement of temperature profiles.Keywords: Hot cracksperidynamicsphase changequench heat transferquenchingsemi-solid state AcknowledgmentsThe authors express their gratitude to Dr. Nyein Nyein Linn (AIRTF scholar) who came from Myanmar for the short-term research training at NIT-T. We express our sincere thanks to the project students Manu Aatitya R P, Yogeesh S, and Sriranga V who helped us to develop the PD code in MATLAB.Authors’ contributionsJijo Prasad Jayaprasad Remani: Writing – Original Draft, Methodology, Investigation, Formal analysis, Visualization, Software, Validation.Saravanakumar Palanisamy: Experimental measurement and observations, Software, Validation.Ashok Kumar Nallathambi: Supervision, Conceptualization, Writing – Review & Editing, Project administration, Software.Selda Oterkus: Peridynamic formulation of heat transfer – Methodology.Daniel Juhre, and Eckehard Specht: Experimental measurement and observations – Resources, Investigation.Data availability statementThe raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work is financially supported by the Science and Engineering Research Board (SERB-DST), India under the project SRG/2019/001463. OvGU Magdeburg, supported for the scholar’s experimentation under funding GRK 1554.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-14DOI: 10.1080/01495739.2023.2253877
D. H. Li, S. Ma
AbstractThe dynamic thermomechanical analysis on stiffened composite plates with damages are investigated in this article based on the extended layerwise method (XLWM) and three-dimensional finite elements method; a thermomechanical extended-layerwise/Solid-element method (TELW/SE) is established. In TELW/SE, the thermomechanical extended-layerwise method (TELW) and thermomechanical three-dimensional solid elements are used to simulate plate and stiffeners, respectively. The final governing equations are assembled by using the interface conditions to ensure the compatibility of displacements and temperature, together with the internal force equilibrium. Several typical damages in stiffened composite plates can be described accurately in the proposed method, such as delamination, transverse crack and stiffener/plate interface debonding.Keywords: Delaminationdynamic thermomechanical analysisextended layerwise methodinterface debondingstiffened composite platestransverse crack Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Natural Science Foundations of China (12072364, U1933102) and Fundamental Research Funds for the Central Universities (3122019074).
{"title":"Dynamic thermomechanical analysis on stiffened composite plates with damage","authors":"D. H. Li, S. Ma","doi":"10.1080/01495739.2023.2253877","DOIUrl":"https://doi.org/10.1080/01495739.2023.2253877","url":null,"abstract":"AbstractThe dynamic thermomechanical analysis on stiffened composite plates with damages are investigated in this article based on the extended layerwise method (XLWM) and three-dimensional finite elements method; a thermomechanical extended-layerwise/Solid-element method (TELW/SE) is established. In TELW/SE, the thermomechanical extended-layerwise method (TELW) and thermomechanical three-dimensional solid elements are used to simulate plate and stiffeners, respectively. The final governing equations are assembled by using the interface conditions to ensure the compatibility of displacements and temperature, together with the internal force equilibrium. Several typical damages in stiffened composite plates can be described accurately in the proposed method, such as delamination, transverse crack and stiffener/plate interface debonding.Keywords: Delaminationdynamic thermomechanical analysisextended layerwise methodinterface debondingstiffened composite platestransverse crack Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Natural Science Foundations of China (12072364, U1933102) and Fundamental Research Funds for the Central Universities (3122019074).","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-14DOI: 10.1080/01495739.2023.2256823
Kunkun Xie, Haopeng Song, Peter Schiavone, Cunfa Gao
AbstractJoule heat induced by electric current may well lead to thermal stress and contribute to structural failure and crack evolution in a range of modern materials. In this paper, we use complex variable methods to obtain the thermoelastic fields around an elliptic cavity in a plate subjected to remote electric and thermal loads. Of particular interest is the fact that we consider the temperature dependency of the corresponding thermoelastic coefficients. We introduce an analytical method which is verified by the fact that it leads to results which reduce to the classical analytical results in the literature when the thermoelastic coefficients are taken to be temperature-independent. We find that when the elliptic cavity is reduced to the representation of a linear crack, the corresponding stress intensity factor increases to a greater extent under the temperature-dependent assumption versus the corresponding classical results. Our findings are significant in forming the basis for the analysis of the evolution of crack growth under severe temperature gradients such as those occurring as a result of Joule heat loading.Keywords: Crack arrestelectric currentJoule heatstress intensity factorstemperature-dependentthermoelastic fields Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors would like to thank support from the National Natural Science Foundation of China (NSFC) (11872203) and China Scholarship Council (CSC). This work is also supported by the Joint Fund of Advanced Aerospace Manufacturing Technology Research (U1937601) and the National Natural Science Foundation of China for Creative Research Groups (No. 51921003). Schiavone thanks the Natural Sciences and Engineering Research Council of Canada (Grant No: RGPIN – 2017 - 03716115112).
{"title":"Analytical solution of the temperature-dependent thermoelastic problem induced by Joule heating and the presence of an elliptic cavity","authors":"Kunkun Xie, Haopeng Song, Peter Schiavone, Cunfa Gao","doi":"10.1080/01495739.2023.2256823","DOIUrl":"https://doi.org/10.1080/01495739.2023.2256823","url":null,"abstract":"AbstractJoule heat induced by electric current may well lead to thermal stress and contribute to structural failure and crack evolution in a range of modern materials. In this paper, we use complex variable methods to obtain the thermoelastic fields around an elliptic cavity in a plate subjected to remote electric and thermal loads. Of particular interest is the fact that we consider the temperature dependency of the corresponding thermoelastic coefficients. We introduce an analytical method which is verified by the fact that it leads to results which reduce to the classical analytical results in the literature when the thermoelastic coefficients are taken to be temperature-independent. We find that when the elliptic cavity is reduced to the representation of a linear crack, the corresponding stress intensity factor increases to a greater extent under the temperature-dependent assumption versus the corresponding classical results. Our findings are significant in forming the basis for the analysis of the evolution of crack growth under severe temperature gradients such as those occurring as a result of Joule heat loading.Keywords: Crack arrestelectric currentJoule heatstress intensity factorstemperature-dependentthermoelastic fields Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors would like to thank support from the National Natural Science Foundation of China (NSFC) (11872203) and China Scholarship Council (CSC). This work is also supported by the Joint Fund of Advanced Aerospace Manufacturing Technology Research (U1937601) and the National Natural Science Foundation of China for Creative Research Groups (No. 51921003). Schiavone thanks the Natural Sciences and Engineering Research Council of Canada (Grant No: RGPIN – 2017 - 03716115112).","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-12DOI: 10.1080/01495739.2023.2256804
Zhao Zhang, Yifei Wang, Zhijun Tan, Daxin Ren
Abstract A Monte Carlo model is established to simulate grain morphologies and combined with a precipitate evolution model to predict the mechanical properties of different zones in different layers of friction stir additive manufacturing (FSAM). Subsequently, a subregion model is established by considering the different mechanical properties at different locations to predict the residual states in FSAM. Results indicate that equiaxed grains are formed in the stirring zone and that the average grain size can be decreased by increasing the build height. The yield strengths in the stirring and heat-affected zones increase along the build direction and decrease with increasing temperature. The error between the predicted and experimental yield strengths is 3.3%. By considering changes in the mechanical properties in the stirring and heat-affected zones, the distortion error between the experimental test and numerical model can be reduced by 25% compared with that between the experimental test and the conventional model. The predicted residual stresses can be reduced by considering the strength reduction caused by the friction stirring effect. As the number of built layers increases, the maximum distortion in FSAM increases.
{"title":"Integrated modeling of microstructure-property-distortion relationship in friction stir additive manufacturing","authors":"Zhao Zhang, Yifei Wang, Zhijun Tan, Daxin Ren","doi":"10.1080/01495739.2023.2256804","DOIUrl":"https://doi.org/10.1080/01495739.2023.2256804","url":null,"abstract":"Abstract A Monte Carlo model is established to simulate grain morphologies and combined with a precipitate evolution model to predict the mechanical properties of different zones in different layers of friction stir additive manufacturing (FSAM). Subsequently, a subregion model is established by considering the different mechanical properties at different locations to predict the residual states in FSAM. Results indicate that equiaxed grains are formed in the stirring zone and that the average grain size can be decreased by increasing the build height. The yield strengths in the stirring and heat-affected zones increase along the build direction and decrease with increasing temperature. The error between the predicted and experimental yield strengths is 3.3%. By considering changes in the mechanical properties in the stirring and heat-affected zones, the distortion error between the experimental test and numerical model can be reduced by 25% compared with that between the experimental test and the conventional model. The predicted residual stresses can be reduced by considering the strength reduction caused by the friction stirring effect. As the number of built layers increases, the maximum distortion in FSAM increases.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135825578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-12DOI: 10.1080/01495739.2023.2253864
Rajneesh Kumar Chaudhary, Jitendra Singh
{"title":"Numerical simulation of non–linear skin model with energy dissipation during hyperthermia and its validation with experimental data","authors":"Rajneesh Kumar Chaudhary, Jitendra Singh","doi":"10.1080/01495739.2023.2253864","DOIUrl":"https://doi.org/10.1080/01495739.2023.2253864","url":null,"abstract":"","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135825960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-11DOI: 10.1080/01495739.2023.2247037
Mahdieh Tajabadi Ebrahimi, Daniel Stephen Balint, Daniele Dini
In this study, we present a general numerical solution to the thermoelastic problem of interacting elliptical inhomogeneities in an infinite matrix material. Our solution provides a framework to study microstructural responses to the external mechanical, thermal, electric, and magnetic fields simultaneously. The proposed semi-analytical method, which enables us to reduce the computational cost and calculate the interactions between many inclusions, is based on conformal mapping, series expansion of the corresponding complex potentials and boundary conditions. The temperature, stress, strain, and displacement functions are derived explicitly in the matrix material and inclusions. The thermal loadings tested in this study include temperature variations and a uniform heat flow. The model is validated against multiple analytical calculations and benchmark numerical problems. The method is ready to apply for simulations with many inclusions.
{"title":"An analytical solution for multiple inclusions subject to a general applied thermal field","authors":"Mahdieh Tajabadi Ebrahimi, Daniel Stephen Balint, Daniele Dini","doi":"10.1080/01495739.2023.2247037","DOIUrl":"https://doi.org/10.1080/01495739.2023.2247037","url":null,"abstract":"In this study, we present a general numerical solution to the thermoelastic problem of interacting elliptical inhomogeneities in an infinite matrix material. Our solution provides a framework to study microstructural responses to the external mechanical, thermal, electric, and magnetic fields simultaneously. The proposed semi-analytical method, which enables us to reduce the computational cost and calculate the interactions between many inclusions, is based on conformal mapping, series expansion of the corresponding complex potentials and boundary conditions. The temperature, stress, strain, and displacement functions are derived explicitly in the matrix material and inclusions. The thermal loadings tested in this study include temperature variations and a uniform heat flow. The model is validated against multiple analytical calculations and benchmark numerical problems. The method is ready to apply for simulations with many inclusions.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135938901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-08DOI: 10.1080/01495739.2023.2231988
G. Khenniche, Hocine Sissaoui, Lamine Bouzettouta, Salah Bouhouche
Abstract In this paper, we study a nonlinear parabolic type model with an inequality constraint on the solution describing the phase liquid-solid heat transfer during the solidification process in continuous casting. We consider a semi-discretization with respect to time (implicit Euler method in time) of the studied thermal problem. We have a sequence of stationary constrained problems. Reformulating the problem into a variational inequality problem and thanks to the approximation (linearization) of the nonlinear boundary condition (radiation condition) and appropriate assumptions, we establish a result of existence and uniqueness of the solution of the stationary problem. We also consider a multivalued formulation of the same problem allowing the analysis of the behavior of the iterative relaxation algorithm used for the numerical solution of the discretized problem. Finally, numerical simulations are displayed.
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