Pub Date : 2024-06-05DOI: 10.1007/s10999-024-09714-8
Changwei Tang, Guansuo Dui, Yuyao Fu
{"title":"Explicit determination for exact solutions of elastic rectangular beams","authors":"Changwei Tang, Guansuo Dui, Yuyao Fu","doi":"10.1007/s10999-024-09714-8","DOIUrl":"https://doi.org/10.1007/s10999-024-09714-8","url":null,"abstract":"","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141383258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-19DOI: 10.1007/s10999-024-09717-5
Sheng Liu, Bin Gu, Haidong Yu, Chenxuan Hu
The planar maneuvering mechanism’s motion accuracy and dynamic performance are critical for aero-engine power adjustment and vibration reduction. The uncertain clearance tolerances in the revolute joints lead to uncertainty in the joint contact characteristics and the mechanism’s dynamic performance. The combination of multiple joints’ clearance tolerances can be rationally designed and selected to balance the economy of joint manufacturing and the reliability of mechanism performance. In this paper, the uncertainty relationship between clearance tolerances of the joints and mechanism characteristics is investigated by using fuzzy sets and fuzzy algorithms. A new conformal contact model is established to accurately evaluate the contact forces of the revolute joint containing small clearance, which is demonstrated to have better performance when the joint clearance is small by comparing with two traditional models. The mechanism’s dynamic model is constructed, which introduces the contact forces and dissipation effect of multiple joints. Then, the fuzzy distribution and the fuzzy decomposition theory are applied to represent and grade clearance tolerance, respectively. The uncertain static contact characteristic of the joint is studied at different clearance tolerances by using the fuzzy transformation method, and the corresponding clearance tolerances can be designed and selected according to the specific required elastic contact force. Meanwhile, the uncertainty mapping relationship between the clearance tolerance of multiple joints and mechanism dynamic performance is also established, and the combination of multiple joints’ clearance tolerances can be rationally selected based on the evaluation results of uncertain dynamic performance. The proposed method provides a significant reference to realize the specified mechanism’s performance requirement by designing the joint clearance tolerance.
{"title":"Tolerance design of revolute clearance joints for aero-engine planar maneuvering mechanism by uncertain dynamic performance evaluation","authors":"Sheng Liu, Bin Gu, Haidong Yu, Chenxuan Hu","doi":"10.1007/s10999-024-09717-5","DOIUrl":"https://doi.org/10.1007/s10999-024-09717-5","url":null,"abstract":"<p>The planar maneuvering mechanism’s motion accuracy and dynamic performance are critical for aero-engine power adjustment and vibration reduction. The uncertain clearance tolerances in the revolute joints lead to uncertainty in the joint contact characteristics and the mechanism’s dynamic performance. The combination of multiple joints’ clearance tolerances can be rationally designed and selected to balance the economy of joint manufacturing and the reliability of mechanism performance. In this paper, the uncertainty relationship between clearance tolerances of the joints and mechanism characteristics is investigated by using fuzzy sets and fuzzy algorithms. A new conformal contact model is established to accurately evaluate the contact forces of the revolute joint containing small clearance, which is demonstrated to have better performance when the joint clearance is small by comparing with two traditional models. The mechanism’s dynamic model is constructed, which introduces the contact forces and dissipation effect of multiple joints. Then, the fuzzy distribution and the fuzzy decomposition theory are applied to represent and grade clearance tolerance, respectively. The uncertain static contact characteristic of the joint is studied at different clearance tolerances by using the fuzzy transformation method, and the corresponding clearance tolerances can be designed and selected according to the specific required elastic contact force. Meanwhile, the uncertainty mapping relationship between the clearance tolerance of multiple joints and mechanism dynamic performance is also established, and the combination of multiple joints’ clearance tolerances can be rationally selected based on the evaluation results of uncertain dynamic performance. The proposed method provides a significant reference to realize the specified mechanism’s performance requirement by designing the joint clearance tolerance.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-13DOI: 10.1007/s10999-024-09716-6
Phuc L. H. Ho, Changkye Lee
This study presents an efficient numerical approach for pseudo-lower bound limit analysis of structures. The total stress field is decomposed into two components: an elastic component associated with the safety factor and a self-equilibrating residual component. Subsequently, equilibrium conditions within the optimization problem are satisfied in a weak manner. The application of the adaptive quadtree edge-based smoothed finite element method (ES-FEM), combined with the transformation into the second-order cone programming (SOCP) form, ensures the resulting optimization problem remains minimal in size. Moreover, employing a yield stress-based adaptive strategy in the proposed procedure either accurately provides limit loads with low computational effort or effectively predicts the collapse mechanism through the concentration of elements after mesh refinement progress. The investigation of a series of numerical tests confirms the effectiveness and reliability of the proposed method.
{"title":"Adaptive quadtree edge-based smoothed finite element method for limit state analysis of structures","authors":"Phuc L. H. Ho, Changkye Lee","doi":"10.1007/s10999-024-09716-6","DOIUrl":"https://doi.org/10.1007/s10999-024-09716-6","url":null,"abstract":"<p>This study presents an efficient numerical approach for pseudo-lower bound limit analysis of structures. The total stress field is decomposed into two components: an elastic component associated with the safety factor and a self-equilibrating residual component. Subsequently, equilibrium conditions within the optimization problem are satisfied in a weak manner. The application of the adaptive quadtree edge-based smoothed finite element method (ES-FEM), combined with the transformation into the second-order cone programming (SOCP) form, ensures the resulting optimization problem remains minimal in size. Moreover, employing a yield stress-based adaptive strategy in the proposed procedure either accurately provides limit loads with low computational effort or effectively predicts the collapse mechanism through the concentration of elements after mesh refinement progress. The investigation of a series of numerical tests confirms the effectiveness and reliability of the proposed method.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Engineering cementitious composites (ECC) are widely used in concrete structures for resisting impact loads. This paper establishes a peridynamics (PD)-based model for impact crack propagation in ECC, incorporating a failure criterion considering the strain rate effect, to investigate the damage behavior of ECC under impact loading. Firstly, an improved prototype microelastic brittle material (PMB) model considering the strain softening stage is used to model the cementitious matrix of ECC, and the fibers are modeled as one-dimensional rod to establish a PD fully-discrete model of ECC. At the same time, an interface exponential friction attenuation model is introduced. Then, the effectiveness of the model and the PD impact contact algorithm incorporating the strain rate effect was validated through simulations of the four-point bending test on ECC rectangular plates and the drop hammer impact test on plain concrete beams. Finally, the effects of pre-cracks-to-span distance, fiber content, fiber aspect ratio, different strain rate, and impact velocity on the crack propagation and structural deflection of ECC beams under impact loading are investigated.
{"title":"Peridynamics simulation of failure behavior of engineering cementitious composites (ECC) under impact loading","authors":"Zhanqi Cheng, Xing Ren, Jiyu Tang, Xiangxi Jia, Chengcong Gao","doi":"10.1007/s10999-024-09712-w","DOIUrl":"https://doi.org/10.1007/s10999-024-09712-w","url":null,"abstract":"<p>Engineering cementitious composites (ECC) are widely used in concrete structures for resisting impact loads. This paper establishes a peridynamics (PD)-based model for impact crack propagation in ECC, incorporating a failure criterion considering the strain rate effect, to investigate the damage behavior of ECC under impact loading. Firstly, an improved prototype microelastic brittle material (PMB) model considering the strain softening stage is used to model the cementitious matrix of ECC, and the fibers are modeled as one-dimensional rod to establish a PD fully-discrete model of ECC. At the same time, an interface exponential friction attenuation model is introduced. Then, the effectiveness of the model and the PD impact contact algorithm incorporating the strain rate effect was validated through simulations of the four-point bending test on ECC rectangular plates and the drop hammer impact test on plain concrete beams. Finally, the effects of pre-cracks-to-span distance, fiber content, fiber aspect ratio, different strain rate, and impact velocity on the crack propagation and structural deflection of ECC beams under impact loading are investigated.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140600556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-30DOI: 10.1007/s10999-024-09709-5
Yating Ou, A. Köllner, A. Dönitz, T. Richter, C. Völlmecke
{"title":"Material extrusion additive manufacturing of novel lightweight collinear stayed polymer lattices","authors":"Yating Ou, A. Köllner, A. Dönitz, T. Richter, C. Völlmecke","doi":"10.1007/s10999-024-09709-5","DOIUrl":"https://doi.org/10.1007/s10999-024-09709-5","url":null,"abstract":"","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140364757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-30DOI: 10.1007/s10999-024-09713-9
M. K. Sharma, H. Alkhazaleh, Shavan K. Askar, Noor Hanoon Haroon, Saman M. Almufti, Mohammad Rustom Al Nasar
{"title":"FEM-supported machine learning for residual stress and cutting force analysis in micro end milling of aluminum alloys","authors":"M. K. Sharma, H. Alkhazaleh, Shavan K. Askar, Noor Hanoon Haroon, Saman M. Almufti, Mohammad Rustom Al Nasar","doi":"10.1007/s10999-024-09713-9","DOIUrl":"https://doi.org/10.1007/s10999-024-09713-9","url":null,"abstract":"","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140361904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.1007/s10999-024-09711-x
Farshid Golnary, Mohsen Asghari
Spinodoid topologies are bicontinuous porous microstructures inspired by the natural spinodal decomposition process. They offer a vast design space and are capable of representing anisotropic topologies, which makes them suitable for use in biomedical applications. This work focuses on some fundamental aspects in spinodoid microstructures. As the first, the extent of anisotropy is computed by a universal index and its correlation with spinodoid design parameters, including relative density and the three cone angles, is investigated. In order to do this, the k-means clustering method is utilized to group the topologies based on their level of anisotropy. Within each cluster, the relationship between the statistical features of the design parameters and the extent of anisotropy is analyzed in detail. As one of the findings, it is revealed that topologies created by larger cone angles will lie in low anisotropy category. Although the sensitivity analysis indicates that all the cone angles are equally important in determining the elasticity tensor elements, our findings demonstrate that there are some discrepancies in the probability density function of cone angles in topologies with high anisotropy. In addition, the results show that lower relative densities tend to lead to higher anisotropy in the structures regardless of cone angle values. In the second stage of this work, a data-driven framework for inverse design is proposed. This approach involves generating high-quality samples and utilizing an efficient data-driven framework capable of handling unequal queries. It can identify multiple spinodoid candidates for a desired elasticity tensor, rather than just one. This approach has great advantages, especially in manufacturing, where different topologies may have varying manufacturing costs. This provides designers with more choices to select from. In the final stage, we estimated the statistical distribution of the elasticity tensor components for the generated spinodoid topologies. By measuring the Mahalanobis distance between a query and the estimated distribution, one can determine whether the query belongs to the property space of spinodoid topologies or not. This approach allows for assessing the similarity or dissimilarity of a query to the distribution of the generated spinodoid topologies.
旋转体拓扑结构是一种双连续多孔微结构,其灵感来自于自然旋转体分解过程。它们提供了广阔的设计空间,能够表现各向异性的拓扑结构,因此适用于生物医学应用。这项工作的重点是旋转体微结构的一些基本方面。首先,通过一个通用指数计算各向异性的程度,并研究其与尖晶石设计参数(包括相对密度和三个锥角)的相关性。为此,利用 K 均值聚类法根据各向异性程度对拓扑结构进行分组。在每个聚类中,详细分析了设计参数的统计特征与各向异性程度之间的关系。其中一项研究结果表明,锥角较大的拓扑结构属于低各向异性类别。尽管灵敏度分析表明,所有锥角在确定弹性张量元素方面同等重要,但我们的研究结果表明,在高各向异性拓扑中,锥角的概率密度函数存在一些差异。此外,结果表明,无论锥角值如何,相对密度越低,结构的各向异性越大。在这项工作的第二阶段,提出了一个数据驱动的逆向设计框架。这种方法涉及生成高质量样本,并利用能够处理不平等查询的高效数据驱动框架。它可以为所需的弹性张量识别多个旋进样条候选,而不仅仅是一个。这种方法具有很大的优势,尤其是在制造领域,不同的拓扑结构可能会产生不同的制造成本。这为设计者提供了更多选择。在最后阶段,我们估算了所生成的旋片拓扑结构的弹性张量成分的统计分布。通过测量查询与估计分布之间的马哈拉诺比斯距离,我们可以确定查询是否属于椎体拓扑的属性空间。通过这种方法,可以评估查询与生成的刺状拓扑分布之间的相似性或不相似性。
{"title":"Data-driven analysis of spinodoid topologies: anisotropy, inverse design, and elasticity tensor distribution","authors":"Farshid Golnary, Mohsen Asghari","doi":"10.1007/s10999-024-09711-x","DOIUrl":"https://doi.org/10.1007/s10999-024-09711-x","url":null,"abstract":"<p>Spinodoid topologies are bicontinuous porous microstructures inspired by the natural spinodal decomposition process. They offer a vast design space and are capable of representing anisotropic topologies, which makes them suitable for use in biomedical applications. This work focuses on some fundamental aspects in spinodoid microstructures. As the first, the extent of anisotropy is computed by a universal index and its correlation with spinodoid design parameters, including relative density and the three cone angles, is investigated. In order to do this, the k-means clustering method is utilized to group the topologies based on their level of anisotropy. Within each cluster, the relationship between the statistical features of the design parameters and the extent of anisotropy is analyzed in detail. As one of the findings, it is revealed that topologies created by larger cone angles will lie in low anisotropy category. Although the sensitivity analysis indicates that all the cone angles are equally important in determining the elasticity tensor elements, our findings demonstrate that there are some discrepancies in the probability density function of cone angles in topologies with high anisotropy. In addition, the results show that lower relative densities tend to lead to higher anisotropy in the structures regardless of cone angle values. In the second stage of this work, a data-driven framework for inverse design is proposed. This approach involves generating high-quality samples and utilizing an efficient data-driven framework capable of handling unequal queries. It can identify multiple spinodoid candidates for a desired elasticity tensor, rather than just one. This approach has great advantages, especially in manufacturing, where different topologies may have varying manufacturing costs. This provides designers with more choices to select from. In the final stage, we estimated the statistical distribution of the elasticity tensor components for the generated spinodoid topologies. By measuring the Mahalanobis distance between a query and the estimated distribution, one can determine whether the query belongs to the property space of spinodoid topologies or not. This approach allows for assessing the similarity or dissimilarity of a query to the distribution of the generated spinodoid topologies.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140152604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-13DOI: 10.1007/s10999-023-09694-1
Sajad Azarakhsh, Mohammad Javad Rezvani, Adel Maghsoudpour, Ali Jahan
This paper presents the quasi-static free inversion behavior of a new conical tube absorber. The absorber is composed of a multi-component conical tube with a spherical end cap and varying lengths and diameters. When this structure undergoes an axial load, each tube component freely inverts inside the next component like a telescope. Finite element (FE) models were made using ABAQUS explicit code to simulate the deformation and energy absorption of multi-component conical tubes. To verify the accuracy of the FE models, they were validated with experimental tests. As a general framework for a design optimization study, structural parameters such as wall thickness, cap radius, and edge length of the absorber affect the initial peak load and specific energy absorption. To achieve the optimal design for the multi-component conical tube, mathematical models were developed using the response surface method, and the multi-objective optimization procedure was applied to find the optimal values for the design variables. The results of the multi-objective optimization demonstrated improvements in both objective functions compared to existing designs. Specifically, by increasing the cap radius and decreasing the edge length, the initial peak load was reduced, while increasing the wall thickness the specific energy absorption was enhanced.
{"title":"Inversion performance and multi-objective optimization of multi-component conical energy absorber with a spherical cap","authors":"Sajad Azarakhsh, Mohammad Javad Rezvani, Adel Maghsoudpour, Ali Jahan","doi":"10.1007/s10999-023-09694-1","DOIUrl":"https://doi.org/10.1007/s10999-023-09694-1","url":null,"abstract":"<p>This paper presents the quasi-static free inversion behavior of a new conical tube absorber. The absorber is composed of a multi-component conical tube with a spherical end cap and varying lengths and diameters. When this structure undergoes an axial load, each tube component freely inverts inside the next component like a telescope. Finite element (FE) models were made using ABAQUS explicit code to simulate the deformation and energy absorption of multi-component conical tubes. To verify the accuracy of the FE models, they were validated with experimental tests. As a general framework for a design optimization study, structural parameters such as wall thickness, cap radius, and edge length of the absorber affect the initial peak load and specific energy absorption. To achieve the optimal design for the multi-component conical tube, mathematical models were developed using the response surface method, and the multi-objective optimization procedure was applied to find the optimal values for the design variables. The results of the multi-objective optimization demonstrated improvements in both objective functions compared to existing designs. Specifically, by increasing the cap radius and decreasing the edge length, the initial peak load was reduced, while increasing the wall thickness the specific energy absorption was enhanced.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140117297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-09DOI: 10.1007/s10999-023-09706-0
Abstract
Vibration characteristics for rotating thin shallow shell blades reinforced with functionally graded graphene platelets (FGGP) under the axial force are conducted. The blade is modeled as four twisted cantilever thin shallow shells, each with a unique shape cylindrical shallow shell panel with a straight or curved boundary as the cantilever side, spherical shallow shell panel and hyperbolic parabolic shallow shell panel. The Halpin–Tsai model, the first-order shear deformation theory and the Rayleigh–Ritz method are used to calculate the frequencies and mode shapes of the blade. The results are validated by comparing them with previous literature and ANSYS. An analysis is conducted on a range of parameters, encompassing graphene properties, rotational velocity, torsional angle, curvature radius, aspect ratio and axial forces, in order to assess their influence on the vibrational properties of the blade. The vibration behaviors of a rotating cylindrical shallow shell panel with a straight cantilever edge are found to be distinctive. The findings indicate that the blade’s stiffness is significantly higher when reinforced with FGGP-X compared to FGGP-U distribution, with FGGP-O distribution exhibiting the lowest stiffness. Furthermore, the study implies that a total layer count exceeding ten has a negligible impact on the degree of graphene distribution. Finally, the study concludes that the curvature and graphene distribution pattern significantly influence the vibration characteristics of the blade.
{"title":"Optimization of vibration analysis for functionally graded graphene platelets (FGGP) reinforced twisted cantilever thin shallow shell blades subjected to axial loading","authors":"","doi":"10.1007/s10999-023-09706-0","DOIUrl":"https://doi.org/10.1007/s10999-023-09706-0","url":null,"abstract":"<h3>Abstract</h3> <p>Vibration characteristics for rotating thin shallow shell blades reinforced with functionally graded graphene platelets (FGGP) under the axial force are conducted. The blade is modeled as four twisted cantilever thin shallow shells, each with a unique shape cylindrical shallow shell panel with a straight or curved boundary as the cantilever side, spherical shallow shell panel and hyperbolic parabolic shallow shell panel. The Halpin–Tsai model, the first-order shear deformation theory and the Rayleigh–Ritz method are used to calculate the frequencies and mode shapes of the blade. The results are validated by comparing them with previous literature and ANSYS. An analysis is conducted on a range of parameters, encompassing graphene properties, rotational velocity, torsional angle, curvature radius, aspect ratio and axial forces, in order to assess their influence on the vibrational properties of the blade. The vibration behaviors of a rotating cylindrical shallow shell panel with a straight cantilever edge are found to be distinctive. The findings indicate that the blade’s stiffness is significantly higher when reinforced with FGGP-X compared to FGGP-U distribution, with FGGP-O distribution exhibiting the lowest stiffness. Furthermore, the study implies that a total layer count exceeding ten has a negligible impact on the degree of graphene distribution. Finally, the study concludes that the curvature and graphene distribution pattern significantly influence the vibration characteristics of the blade.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140100226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-23DOI: 10.1007/s10999-024-09708-6
Shiyang Liu, Gongqi Cao, Yuchen Jin, Jianlin Liu
Due to their superior biocompatibility, flexibility and control strategy compared to the traditional robots, soft robots have been widely used in a wide spectrum of engineering areas, such as biomedical, exploration, aerospace, intelligent devices and other fields. However, the existing soft robot structures mainly focus on employing homogeneous materials, which greatly limits the design flexibilities of soft robots, and correspondingly, the existing theories are usually invalid for calculating heterogeneous large deformation beam models. Therefore, we developed a novel simulation method and an advanced theoretical calculation method for representing the large deformation of both the homogeneous and heterogeneous beams made of magneto-responsive materials prepared by mixing silicon rubber with NdFeB particles. We found the experimental and numerical results agree very well, showing that the heterogeneous beam can demonstrate a better driving performance than the homogeneous beam. Optimal parameters are afterwards obtained based on the developed simulation and theorical methods. Next, we generalize the optimized heterogeneous structure to engineer the flexible gripper and the soft robot. The grasping forces of the gripper are calculated based on the variational model of large deformation beams, which are consistent with the simulation and experimental values. Moreover, the motion mechanism of magnetic soft robot has been revealed through comprehensive force analysis and formulaic rigid body motion analysis. These findings have strengthened our understandings on the deformation of slender structures and the locomotion of magnetic soft robot, which are promising to guide the design and analysis of innovative devices and robots.
{"title":"Large deformation analysis of the magneto-responsive beam and its applications in flexible grippers and robots","authors":"Shiyang Liu, Gongqi Cao, Yuchen Jin, Jianlin Liu","doi":"10.1007/s10999-024-09708-6","DOIUrl":"https://doi.org/10.1007/s10999-024-09708-6","url":null,"abstract":"<p>Due to their superior biocompatibility, flexibility and control strategy compared to the traditional robots, soft robots have been widely used in a wide spectrum of engineering areas, such as biomedical, exploration, aerospace, intelligent devices and other fields. However, the existing soft robot structures mainly focus on employing homogeneous materials, which greatly limits the design flexibilities of soft robots, and correspondingly, the existing theories are usually invalid for calculating heterogeneous large deformation beam models. Therefore, we developed a novel simulation method and an advanced theoretical calculation method for representing the large deformation of both the homogeneous and heterogeneous beams made of magneto-responsive materials prepared by mixing silicon rubber with NdFeB particles. We found the experimental and numerical results agree very well, showing that the heterogeneous beam can demonstrate a better driving performance than the homogeneous beam. Optimal parameters are afterwards obtained based on the developed simulation and theorical methods. Next, we generalize the optimized heterogeneous structure to engineer the flexible gripper and the soft robot. The grasping forces of the gripper are calculated based on the variational model of large deformation beams, which are consistent with the simulation and experimental values. Moreover, the motion mechanism of magnetic soft robot has been revealed through comprehensive force analysis and formulaic rigid body motion analysis. These findings have strengthened our understandings on the deformation of slender structures and the locomotion of magnetic soft robot, which are promising to guide the design and analysis of innovative devices and robots.</p>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139947717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}