A. Hassan, Mohammed H. Saffarini, F. Abed, G. Voyiadjis
Dynamic Strain Aging (DSA) is a sudden increase in the strength of a material under certain combinations of temperatures and strain rates. Despite the phenomenon being reported in several other studies, the literature still lacks a specific constitutive model that can physically interpret its effect. Therefore, this work proposes a modification based on physical parameters to the Voyiadjis and Abed (VA) model to account for the effect of DSA in C45 steel. The resulting modified model is then coupled with an energy-based damage model to further capture the effect of material softening. Previously, in VA model, it was assumed that the total activation energy for overcoming the obstacles without external work remains same which works well in the absence of DSA. However, during DSA, the mobile dislocations are pinned by the diffusing solute atoms. This results in an increase in the total activation free energy needed by the dislocations to overcome the obstacle. Thus, an increase in strength is observed. It is shown in the current work that utilizing the concept of increased solute concentrations at local obstacles, in conjunction with the physical description that the VA model is based upon, successfully captures the phenomenon of DSA in C45 steel. In addition, the metal experiencing softening after reaching its ultimate strength is due to the significant growth of voids and cracks within the microstructure. To capture this behavior, an energy-based damage parameter is incorporated into the proposed model. The coupled plasticity-damage model shows a good comparison with the experimental results.
{"title":"Physically-based Constitutive Modeling of Dynamic Strain Aging in C45 Steel","authors":"A. Hassan, Mohammed H. Saffarini, F. Abed, G. Voyiadjis","doi":"10.1115/1.4063118","DOIUrl":"https://doi.org/10.1115/1.4063118","url":null,"abstract":"\u0000 Dynamic Strain Aging (DSA) is a sudden increase in the strength of a material under certain combinations of temperatures and strain rates. Despite the phenomenon being reported in several other studies, the literature still lacks a specific constitutive model that can physically interpret its effect. Therefore, this work proposes a modification based on physical parameters to the Voyiadjis and Abed (VA) model to account for the effect of DSA in C45 steel. The resulting modified model is then coupled with an energy-based damage model to further capture the effect of material softening. Previously, in VA model, it was assumed that the total activation energy for overcoming the obstacles without external work remains same which works well in the absence of DSA. However, during DSA, the mobile dislocations are pinned by the diffusing solute atoms. This results in an increase in the total activation free energy needed by the dislocations to overcome the obstacle. Thus, an increase in strength is observed. It is shown in the current work that utilizing the concept of increased solute concentrations at local obstacles, in conjunction with the physical description that the VA model is based upon, successfully captures the phenomenon of DSA in C45 steel. In addition, the metal experiencing softening after reaching its ultimate strength is due to the significant growth of voids and cracks within the microstructure. To capture this behavior, an energy-based damage parameter is incorporated into the proposed model. The coupled plasticity-damage model shows a good comparison with the experimental results.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45686577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Crack-based strain sensors (CBS), which are inspired by a spider's slit organ, can provide highly sensitive measurement with great flexibility. Fracture pattern design holds the key to meeting different sensing needs. In this paper, a computational model is developed to understand the role of fracture patterns on sensitivity and sensing range of CBS that consist of a platinum (Pt) conductive layer and a polydimethylsiloxane (PDMS) substrate layer. Through the coupled mechanical-electrical finite element analysis, we found that a single Mode-I through crack can yield better sensing performance than a non-through crack in other orientations or a few discrete non-through cracks in the same orientation. Creating multiple Mode-I through cracks has negligible effect on sensitivity. However, increasing the number of cracks can lead to higher sensing range. When the same number of cracks are employed, even crack spacing can yield the highest sensing range. Sensitivity can be effectively improved by increasing the crack depth. Conclusions from the computational analysis can provide useful feedback for design and manufacturing of CBS in different applications.
{"title":"The Role of Fracture Patterns on Crack-Based Strain Sensors","authors":"Huan Zhao, Xiangbei Liu, Yan Li","doi":"10.1115/1.4063119","DOIUrl":"https://doi.org/10.1115/1.4063119","url":null,"abstract":"\u0000 Crack-based strain sensors (CBS), which are inspired by a spider's slit organ, can provide highly sensitive measurement with great flexibility. Fracture pattern design holds the key to meeting different sensing needs. In this paper, a computational model is developed to understand the role of fracture patterns on sensitivity and sensing range of CBS that consist of a platinum (Pt) conductive layer and a polydimethylsiloxane (PDMS) substrate layer. Through the coupled mechanical-electrical finite element analysis, we found that a single Mode-I through crack can yield better sensing performance than a non-through crack in other orientations or a few discrete non-through cracks in the same orientation. Creating multiple Mode-I through cracks has negligible effect on sensitivity. However, increasing the number of cracks can lead to higher sensing range. When the same number of cracks are employed, even crack spacing can yield the highest sensing range. Sensitivity can be effectively improved by increasing the crack depth. Conclusions from the computational analysis can provide useful feedback for design and manufacturing of CBS in different applications.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46619284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work presents a 3D progressive damage model based on Puck's failure theory and linear damage evolution in FRP laminates. It includes shear non-linearity, in-situ strengths, equivalent stress-strain, and mixed-mode fracture energy and implemented in Abaqus/explicit through VUMAT subroutine. Various test cases were performed to validate the model and demonstrate its applications. The shear non-linearity test shows that transverse compression retards matrix micro-cracking while transverse tension accelerates it. The open hole tension (OHT) test of laminates shows that delamination initiates around the holes and free edges, spreads the most, and propagates in different directions at different interfaces. Later, inter-fiber damage in 45' or -45' plies initiates and spreads at a slight inclination to the tip of the hole. Lastly, fiber damage in 0' plies initiates at the tip of the hole, spreads the least, and propagates perpendicular to the loading direction. The ply-blocked laminates show around 30% higher strength and fracture strain than non-ply-blocked laminate due to delay in damage propagation, and are less sensitive to hole size. Accordingly, their OHT strength reduces by 14.3% as opposed to 21.14% in the non-ply-blocked laminates, when the hole size increases from 6 to 9 mm. The damage location, magnitude and propagation modes were corroborated with experimental findings in literature.
{"title":"Ply-Blocking Phenomenon and Hole Size Effects in Modeling Progressive Damage in FRP Laminates","authors":"Vishwas Divse, S. Joshi, D. Marla","doi":"10.1115/1.4063075","DOIUrl":"https://doi.org/10.1115/1.4063075","url":null,"abstract":"\u0000 This work presents a 3D progressive damage model based on Puck's failure theory and linear damage evolution in FRP laminates. It includes shear non-linearity, in-situ strengths, equivalent stress-strain, and mixed-mode fracture energy and implemented in Abaqus/explicit through VUMAT subroutine. Various test cases were performed to validate the model and demonstrate its applications. The shear non-linearity test shows that transverse compression retards matrix micro-cracking while transverse tension accelerates it. The open hole tension (OHT) test of laminates shows that delamination initiates around the holes and free edges, spreads the most, and propagates in different directions at different interfaces. Later, inter-fiber damage in 45' or -45' plies initiates and spreads at a slight inclination to the tip of the hole. Lastly, fiber damage in 0' plies initiates at the tip of the hole, spreads the least, and propagates perpendicular to the loading direction. The ply-blocked laminates show around 30% higher strength and fracture strain than non-ply-blocked laminate due to delay in damage propagation, and are less sensitive to hole size. Accordingly, their OHT strength reduces by 14.3% as opposed to 21.14% in the non-ply-blocked laminates, when the hole size increases from 6 to 9 mm. The damage location, magnitude and propagation modes were corroborated with experimental findings in literature.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43352688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Dvorsky, J. Kubásek, D. Nečas, M. Čavojský, J. Drahokoupil, D. Vojtech
Powder metallurgy products display superior performance compared to traditionally cast ingots. The final properties of these products can be altered through various methods, such as pre-treatment of the powder. This study focuses on different pre-treatment techniques, including milling, chemical treatment, and heat treatment, as well as their combinations. The results show that distinct microstructures were produced, and their impact on mechanical and corrosion properties was evaluated. The results indicate that milling and chemical treatment increase the yield strength of the material by up to 34 MPa, but decrease the elongation by up to 5%. On the other hand, heat treatment increases the elongation by up to 7% but decreases the yield strength by up to 36 MPa. Corrosion resistance is improved especially by chemical and heat treatment of powders, where the corrosion rate was observed to decrease by up to 50% in comparison to the value of product from atomized powder. Additionally, all types of powder pre-treatment were found to improve the corrosion resistance of the final product. This provides an opportunity to tailor the mechanical and corrosion properties of these materials to meet specific applications.
{"title":"The Effect of Treatment of Powder Precursor on the Properties of Compacted Mg-4Y-3Re Alloy","authors":"D. Dvorsky, J. Kubásek, D. Nečas, M. Čavojský, J. Drahokoupil, D. Vojtech","doi":"10.1115/1.4063059","DOIUrl":"https://doi.org/10.1115/1.4063059","url":null,"abstract":"\u0000 Powder metallurgy products display superior performance compared to traditionally cast ingots. The final properties of these products can be altered through various methods, such as pre-treatment of the powder. This study focuses on different pre-treatment techniques, including milling, chemical treatment, and heat treatment, as well as their combinations. The results show that distinct microstructures were produced, and their impact on mechanical and corrosion properties was evaluated. The results indicate that milling and chemical treatment increase the yield strength of the material by up to 34 MPa, but decrease the elongation by up to 5%. On the other hand, heat treatment increases the elongation by up to 7% but decreases the yield strength by up to 36 MPa. Corrosion resistance is improved especially by chemical and heat treatment of powders, where the corrosion rate was observed to decrease by up to 50% in comparison to the value of product from atomized powder. Additionally, all types of powder pre-treatment were found to improve the corrosion resistance of the final product. This provides an opportunity to tailor the mechanical and corrosion properties of these materials to meet specific applications.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44447746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Selection of flow stress models and fracture models to model sheet deformation at high strain rates is of great concern. The same is attempted in the present work during shock tube impact forming of 1 mm thick AA 5052-H32 sheet using a rigid nylon striker. Lab scale experiments and finite element simulations using DEFORM 3D are conducted for the purpose. Johnson-Cook flow stress model and Modified Johnson-Cook flow stress model along with fracture models like normalized Cockcroft and Latham model, Rice and Tracey model, Oyane model and McClintock model are tested for their accuracy and consistency. The fracture strain and fracture pattern evaluation suggest that the modified Johnson-Cook flow stress model and Rice and Tracey fracture model are suitable for fracture prediction, and it is better to use these together for fracture evaluation. An alternate method of evaluating rate-dependent tensile properties of sheet at higher strain rates is proposed and delivered acceptable fracture prediction results. Finite element simulations using Hollomon power law predict strain rate of 1925 /s at a striker velocity of 49.79 m/s, which is in the range of values in literature for explosive forming. Systematic shock tube forming experiments for calibrating the fracture models are acceptable.
选择流动应力模型和断裂模型来模拟高应变速率下的薄板变形是非常值得关注的。在本工作中，在使用刚性尼龙撞击器对1mm厚的AA 5052-H32片材进行冲击管冲击成形的过程中也尝试了同样的方法。为此，使用DEFORM 3D进行了实验室规模的实验和有限元模拟。测试了Johnson-Cook流动应力模型和改进的Johnson-库克流动应力模式，以及归一化Cockcroft和Latham模型、Rice和Tracey模型、Oyane模型和McClintock模型等裂缝模型的准确性和一致性。裂缝应变和裂缝形态评价表明，改进的Johnson-Cook流动应力模型和Rice and Tracey裂缝模型适用于裂缝预测，最好将它们结合起来进行裂缝评价。提出了一种评估片材在较高应变速率下与速率相关的拉伸性能的替代方法，并给出了可接受的断裂预测结果。使用霍洛蒙幂律的有限元模拟预测了在49.79m/s的冲击速度下1925/s的应变速率，这在爆炸成形文献中的数值范围内。用于校准断裂模型的系统冲击管成形实验是可接受的。
{"title":"Implementation of Fracture and Flow Stress Models for AA5052-H32 Sheet Deformed through Shock Tube Based Forming Technique","authors":"S. K. Barik, Ganesh R Narayanan, N. Sahoo","doi":"10.1115/1.4063060","DOIUrl":"https://doi.org/10.1115/1.4063060","url":null,"abstract":"\u0000 Selection of flow stress models and fracture models to model sheet deformation at high strain rates is of great concern. The same is attempted in the present work during shock tube impact forming of 1 mm thick AA 5052-H32 sheet using a rigid nylon striker. Lab scale experiments and finite element simulations using DEFORM 3D are conducted for the purpose. Johnson-Cook flow stress model and Modified Johnson-Cook flow stress model along with fracture models like normalized Cockcroft and Latham model, Rice and Tracey model, Oyane model and McClintock model are tested for their accuracy and consistency. The fracture strain and fracture pattern evaluation suggest that the modified Johnson-Cook flow stress model and Rice and Tracey fracture model are suitable for fracture prediction, and it is better to use these together for fracture evaluation. An alternate method of evaluating rate-dependent tensile properties of sheet at higher strain rates is proposed and delivered acceptable fracture prediction results. Finite element simulations using Hollomon power law predict strain rate of 1925 /s at a striker velocity of 49.79 m/s, which is in the range of values in literature for explosive forming. Systematic shock tube forming experiments for calibrating the fracture models are acceptable.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41518879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Natsuhiro Mita, M. Omiya, Shingo Watanabe, Norio Ishizaka
This study investigates the mean stress effect on the fatigue strength and the mean stress effect criterion that best represents this effect in Cu–Ni–Si alloy strips using a new test method. Since the cyclic bending fatigue test based on the fatigue test standard for Japan Copper and Brass Association for understanding the fatigue characteristics of Cu–Ni–Si alloy strips needs many test times, a new test method to conduct effectively was examined and developed, and after confirming its validity, the mean stress effect criterion was identified using this method. The effect of surface electroplating on fatigue properties was also investigated. As a result, it was confirmed that the mean stress effect criterion on the fatigue strength of Cu–Si–Ni alloy strips was represented well by the elliptic line. The effect of surface electrolytic plating on fatigue properties was found to be strongly influenced by surface roughness rather than Young’s modulus or hardness of the constituent plating.
{"title":"Fatigue Strength Evaluation of Cu–Ni–Si Alloy Strips","authors":"Natsuhiro Mita, M. Omiya, Shingo Watanabe, Norio Ishizaka","doi":"10.1115/1.4062714","DOIUrl":"https://doi.org/10.1115/1.4062714","url":null,"abstract":"\u0000 This study investigates the mean stress effect on the fatigue strength and the mean stress effect criterion that best represents this effect in Cu–Ni–Si alloy strips using a new test method. Since the cyclic bending fatigue test based on the fatigue test standard for Japan Copper and Brass Association for understanding the fatigue characteristics of Cu–Ni–Si alloy strips needs many test times, a new test method to conduct effectively was examined and developed, and after confirming its validity, the mean stress effect criterion was identified using this method. The effect of surface electroplating on fatigue properties was also investigated. As a result, it was confirmed that the mean stress effect criterion on the fatigue strength of Cu–Si–Ni alloy strips was represented well by the elliptic line. The effect of surface electrolytic plating on fatigue properties was found to be strongly influenced by surface roughness rather than Young’s modulus or hardness of the constituent plating.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43817478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microstructural evolution and resulting stress, strain, and concentration field distribution during Al3X (X=Sc, Zr, Er) precipitation in Al matrix are investigated in this work using the 3D-multi phase-field method. Depending on the heat treatment, modulus mismatch, lattice parameter mismatch, and interfacial free energy, precipitate developed to rhombicuboctahedron, and near cuboidal morphologies. The composition distribution and AlAl3X transformation driving force map identified a difference in precipitation kinetics for each alloy. The precipitation mechanism in the three systems is analysed in detail with temporal evolution plots of energy components during phase transformation. Al3Er precipitate exhibits the highest growth rate due to Er's high diffusivity and significant lattice parameter mismatch in the Al-Er system. The system has a high chemical and elastic driving force for particle growth, thus attaining quasi-static equilibrium at a relatively lower temperature and time. Therefore, this system observes high magnitude stress, strain, and strain energy field around the Al matrix. The theoretical simulation results obtained from the present study will benefit Aluminium multicomponent alloy design for high strength applications.
{"title":"Elastic Field Evolution in Al-X (X=Sc,Zr,Er) Alloy During Heat Treatment, Insights from 3D- Multi Phase Field Study","authors":"S. Dhanish, Sundar Daniel","doi":"10.1115/1.4062874","DOIUrl":"https://doi.org/10.1115/1.4062874","url":null,"abstract":"\u0000 Microstructural evolution and resulting stress, strain, and concentration field distribution during Al3X (X=Sc, Zr, Er) precipitation in Al matrix are investigated in this work using the 3D-multi phase-field method. Depending on the heat treatment, modulus mismatch, lattice parameter mismatch, and interfacial free energy, precipitate developed to rhombicuboctahedron, and near cuboidal morphologies. The composition distribution and AlAl3X transformation driving force map identified a difference in precipitation kinetics for each alloy. The precipitation mechanism in the three systems is analysed in detail with temporal evolution plots of energy components during phase transformation. Al3Er precipitate exhibits the highest growth rate due to Er's high diffusivity and significant lattice parameter mismatch in the Al-Er system. The system has a high chemical and elastic driving force for particle growth, thus attaining quasi-static equilibrium at a relatively lower temperature and time. Therefore, this system observes high magnitude stress, strain, and strain energy field around the Al matrix. The theoretical simulation results obtained from the present study will benefit Aluminium multicomponent alloy design for high strength applications.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49093827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on a continuum theory that accounts for the underlying molecular physics of polar elastomers (PEs), a typical boundary value problem (BVP) is developed to analyze the electro-mechanical instability (EMI) of PEs with randomly distributed dielectric particles. Through extensive numerical simulations, the effects of various parameters such as particle volume fraction, particle size and enhancement factor related to polar groups on the critical voltage leading to EMI of PEs are investigated. The results are presented in 3D phase diagrams, which may better help researchers to understand EMI of PEs and guide them in synthesis, design, and application of PEs in the fields of chemistry, physics, bio-engineering, etc.
{"title":"On the Electromechanical Instability of Polar Elastomers","authors":"Yanhui Jiang, H. Nayeb-Hashemi, Yan Su","doi":"10.1115/1.4062873","DOIUrl":"https://doi.org/10.1115/1.4062873","url":null,"abstract":"\u0000 Based on a continuum theory that accounts for the underlying molecular physics of polar elastomers (PEs), a typical boundary value problem (BVP) is developed to analyze the electro-mechanical instability (EMI) of PEs with randomly distributed dielectric particles. Through extensive numerical simulations, the effects of various parameters such as particle volume fraction, particle size and enhancement factor related to polar groups on the critical voltage leading to EMI of PEs are investigated. The results are presented in 3D phase diagrams, which may better help researchers to understand EMI of PEs and guide them in synthesis, design, and application of PEs in the fields of chemistry, physics, bio-engineering, etc.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42007547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Zhou, Yi Pan, Lin Chen, Qiang Gao, Beibei Sun
In order to further improve the bending performance of the traditional re-entrant (RE) honeycomb, a novel auxetic honeycomb architecture, called RE-L honeycomb, was proposed by adding an additional link-wall structure to the RE cell. The bending behaviors of the novel RE-L honeycomb, including the properties under linear elastic deformation and the bending behaviors under large deformation, were comprehensively investigated by the analytical, numerical and experimental models. Results show that the proposed RE-L honeycomb significantly improves the bending compliance in the x-direction due to the highly flexible performance of the additional structure, where the bending rigidity and the maximum bending force are only 23% and 29.4% of those of the RE honeycomb, respectively. Besides, the additional structure obviously improves the designability and orthotropic property of the original auxetic honeycomb. In conclusion, the proposed RE-L shows improved bending performance, which deserves more attention in future research and related applications.
{"title":"Study on the Bending Behaviors of a Novel Flexible Re-entrant Honeycomb","authors":"Yang Zhou, Yi Pan, Lin Chen, Qiang Gao, Beibei Sun","doi":"10.1115/1.4062620","DOIUrl":"https://doi.org/10.1115/1.4062620","url":null,"abstract":"\u0000 In order to further improve the bending performance of the traditional re-entrant (RE) honeycomb, a novel auxetic honeycomb architecture, called RE-L honeycomb, was proposed by adding an additional link-wall structure to the RE cell. The bending behaviors of the novel RE-L honeycomb, including the properties under linear elastic deformation and the bending behaviors under large deformation, were comprehensively investigated by the analytical, numerical and experimental models. Results show that the proposed RE-L honeycomb significantly improves the bending compliance in the x-direction due to the highly flexible performance of the additional structure, where the bending rigidity and the maximum bending force are only 23% and 29.4% of those of the RE honeycomb, respectively. Besides, the additional structure obviously improves the designability and orthotropic property of the original auxetic honeycomb. In conclusion, the proposed RE-L shows improved bending performance, which deserves more attention in future research and related applications.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44343044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Fiftieth Anniversary of the Founding of the ASME Journal of Engineering Materials and Technology","authors":"M. Zikry","doi":"10.1115/1.4062506","DOIUrl":"https://doi.org/10.1115/1.4062506","url":null,"abstract":"","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46526666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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