Mechanics of Materials最新文献_第8页

A network-based transversely isotropic visco-hyperelastic constitutive model accounting for pendant chains

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-22 DOI: 10.1016/j.mechmat.2025.105261

Zhenyu Fan , Duo Li , Xianqi Lei , Yujie Wei

{"title":"A network-based transversely isotropic visco-hyperelastic constitutive model accounting for pendant chains","authors":"Zhenyu Fan , Duo Li , Xianqi Lei , Yujie Wei","doi":"10.1016/j.mechmat.2025.105261","DOIUrl":"10.1016/j.mechmat.2025.105261","url":null,"abstract":"<div><div>Crosslinked polymeric films are widely used as a bonding component in flexible electronic devices. The ultra-thin polymeric materials are often transversely isotropic and visco-hyperelastic in response to a wide range of strains. The mechanical properties of such adhesives are a crucial part of the design process and device reliability evaluation. In this paper, we perform systematic investigation by characterizing the mechanical behavior of a typical group of optically clear adhesives (OCAs). By including the influence of pendant chains on the mechanical behaviors of OCAs under different loading conditions, we propose a network-based constitutive model for those OCAs, where a hyperelastic response originates from the crosslinked and entanglement networks and a viscous effect comes from free chains and pendant chains. The model is applied to predict the mechanical response of four commercially available 3M OCAs. Results show that our model can predict the mechanical response of OCAs well. We expect the experiment observation and the developed modelling may help in understanding the mechanical behavior of a wide range of polymeric adhesives for engineering practice.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105261"},"PeriodicalIF":3.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161123","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}

引用次数: 0

Modeling the large deformation and fracture of polymer-metal-polymer film composites – Part Ⅱ: Fracture behaviors

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-21 DOI: 10.1016/j.mechmat.2025.105268

Xiao Tian, Pengfei Ying, Yong Xia

{"title":"Modeling the large deformation and fracture of polymer-metal-polymer film composites – Part Ⅱ: Fracture behaviors","authors":"Xiao Tian, Pengfei Ying, Yong Xia","doi":"10.1016/j.mechmat.2025.105268","DOIUrl":"10.1016/j.mechmat.2025.105268","url":null,"abstract":"<div><div>This study expands on the layered structure model established in part Ⅰ to predict the fracture behavior of polymer-metal-polymer film (PMPF). To capture the fracture behavior of PMPF, the all-boundary cohesive zone model (ABCZM) is adopted, which involves inserting cohesive elements between all continuum element boundaries in potential fracture areas. This allows for the evaluation of the damage behavior of components by FE simulation. To enable the ABCZM in shell assembly, a specific shell cohesive element is introduced. Fracture parameters are identified through the double-edge notched tension, and the fracture response of PMPF is predicted under circular notched tension with different radii. The convergence of the mesh size in ABCZM is discussed, and it is found that a similar fracture behavior of PMPF can be achieved by satisfying a specific relation between the mesh size and fracture parameters. Furthermore, the fracture behavior of the punch test of PMPF is investigated and analyzed through ABCZM, demonstrating its progressiveness in predicting potential cracking paths of PMPF in engineering scenarios.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105268"},"PeriodicalIF":3.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161113","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}

引用次数: 0

Electroelastically coupled stiffness matrix method for phononic crystals with piezoelectric defects and its applications to filters, sensors, and energy harvesters

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-21 DOI: 10.1016/j.mechmat.2025.105262

Soo-Ho Jo

{"title":"Electroelastically coupled stiffness matrix method for phononic crystals with piezoelectric defects and its applications to filters, sensors, and energy harvesters","authors":"Soo-Ho Jo","doi":"10.1016/j.mechmat.2025.105262","DOIUrl":"10.1016/j.mechmat.2025.105262","url":null,"abstract":"<div><div>This study presents a comprehensive analytical framework for one-dimensional phononic crystals (PnCs) integrated with piezoelectric defects, leveraging an electroelastically coupled stiffness matrix under longitudinal wave propagation. This matrix effectively captures the mechanical coupling between defects and piezoelectric devices, as well as the piezoelectric coupling within the devices, providing a robust foundation for predicting key behaviors such as band structures, defect mode shapes, and frequency responses. The stiffness matrix method employed in this study overcomes the numerical instabilities inherent in traditional transfer matrix approaches, thereby enhancing the reliability and precision of the framework. The versatility of the proposed framework is evident in its application across diverse engineering domains, including tunable bandpass filters, high-sensitivity ultrasonic sensors, and energy harvesters. The accuracy of the model is validated through finite-element simulations, which demonstrates significantly reduced computation times. To encourage further research and practical implementation, the study provides MATLAB codes. This study establishes the foundation for extending the framework to bending waves, miniaturized PnCs, and oblique wave propagation scenarios.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105262"},"PeriodicalIF":3.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160601","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}

引用次数: 0

Modeling the large deformation and fracture of polymer-metal-polymer film composites – Part Ι: Constitutive behavior

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-21 DOI: 10.1016/j.mechmat.2025.105267

Pengfei Ying, Xiao Tian, Bobin Xing, Yong Xia

{"title":"Modeling the large deformation and fracture of polymer-metal-polymer film composites – Part Ι: Constitutive behavior","authors":"Pengfei Ying, Xiao Tian, Bobin Xing, Yong Xia","doi":"10.1016/j.mechmat.2025.105267","DOIUrl":"10.1016/j.mechmat.2025.105267","url":null,"abstract":"<div><div>The utilization of polymer-metal-polymer film (PMPF) is widespread due to its exceptional mechanical ductility, chemical stability, and impermeability to air. Nevertheless, the intricate manufacturing process and the multi-layered metal-polymer composition of this composite film contribute to its anisotropic mechanical attributes, posing challenges in modeling large deformations and fractures. In part I of this study, we mainly focus on modeling the constitutive behavior of PMPF.</div><div>PMPF's stress-strain response displays a distinct crossover characteristic not found in any isolated constitutive models. This study proposes a layered model that amalgamates Hill 48 elastoplastic and orthotropic Fung hyperelastic behaviors to account for the internal structure of the composite film. To expedite model calibration, we establish an optimization-based method, integrating an analytical solution for the layered model's uniaxial behavior in diverse orientations. Moreover, a parametric study into the layered structure subjected to punch loading furnishes insights for parameter identification, mitigating potential solution multiplicity. Calibration involves uniaxial tensile tests at distinct material orientations and punch tests. Through comparison of experimental and finite element outcomes spanning multiple loading conditions for two commercial PMPFs, the validity of the approach is demonstrated. This endeavor lays the foundation for more profound exploration into the fracture behavior of this composite material.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105267"},"PeriodicalIF":3.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161114","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}

引用次数: 0

Machine learning-based constitutive parameter identification for crystal plasticity models

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-18 DOI: 10.1016/j.mechmat.2025.105263

Songjiang Lu , Xu Zhang , Yanan Hu , Jielei Chu , Qianhua Kan , Guozheng Kang

{"title":"Machine learning-based constitutive parameter identification for crystal plasticity models","authors":"Songjiang Lu , Xu Zhang , Yanan Hu , Jielei Chu , Qianhua Kan , Guozheng Kang","doi":"10.1016/j.mechmat.2025.105263","DOIUrl":"10.1016/j.mechmat.2025.105263","url":null,"abstract":"<div><div>The crystal plasticity finite element (CPFE) method has emerged as an effective tool in probing the deformation mechanism of crystalline materials. A critical challenge in practical CPFE applications is the rapid and precise calibration of parameters for the crystal plasticity constitutive model, essential for accurate simulations. In this study, the machine learning method is employed to identify the parameters of the crystal plasticity constitutive model. The proposed machine learning method can directly determine the material parameters of the adopted constitutive model from experimentally obtained macroscopic tensile stress-strain curves. A proper Voronoi polycrystalline finite element model is established, and the uniaxial tensile stress-strain curves of polycrystalline copper (Cu) are calculated by using the adopted crystal plasticity constitutive model with different parameter combinations, thereby constructing a database for machine learning. The findings demonstrate that the stress-strain curves simulated from model parameters, as predicted by the machine learning method, align closely with the experimental results. Furthermore, feature importance analysis, utilizing the random forest algorithm, elucidates the relationship between the constitutive model parameters and the macroscopic stress-strain curve characteristics, such as yield stress and strain hardening rate. Additionally, the machine learning model, trained with the simulation data of Cu, is capable of determining the material parameters of other face-centered cubic metals, such as Ni, AISI 316L stainless steel and CrMnFeCoNi HEA, showcasing its extensive utility.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105263"},"PeriodicalIF":3.4,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161110","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}

引用次数: 0

Materials mechanics beyond the Horizon – Alan Needleman at 80

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-15 DOI: 10.1016/j.mechmat.2025.105259

Ankit Srivastava , Jose A. Rodríguez-Martínez , A. Amine Benzerga , Vikram S. Deshpande

引用次数: 0

On the dynamic JKR adhesion problem

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-15 DOI: 10.1016/j.mechmat.2025.105252

M. Ciavarella , M. Tricarico , A. Papangelo

{"title":"On the dynamic JKR adhesion problem","authors":"M. Ciavarella , M. Tricarico , A. Papangelo","doi":"10.1016/j.mechmat.2025.105252","DOIUrl":"10.1016/j.mechmat.2025.105252","url":null,"abstract":"<div><div>Shui et al. (2020) have recently shown that applying high-frequency vibrations, we can increase the mean adhesion between viscoelastic solids. This is due to the fact that oscillating contact area leads to an effect of increased apparent surface energy during the retraction phase which can be described by the well known empirical Gent and Schultz law (GS). However, Shui et al solution surprisingly appears not to depend on GS constants, which would imply perhaps no amplification. Yi et al. (2024) have made similar experiments, and proposed a simpler fitting model, which seems to work however with widely different GS constant when changing the sphere radius. Here, we solve the JKR dynamic adhesion problem for a sphere oscillating on a substrate by imposing an harmonic oscillation of the contact area, which permits to obtain a very simple solution by simply averaging the resulting cycle of indentation. We find that the solution is close to a JKR form for the mean indentation vs mean force, which we find in a simple approximation. Although there is saturation in the amplification when the contact radius shrinks to zero and the problem becomes that of impacts at large amplitudes of vibrations, experiments show that other saturations occurs first, presently unclear. We discuss also the influence of resonances. We find reasonable agreement with experiments conducted on PDMS.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"202 ","pages":"Article 105252"},"PeriodicalIF":3.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relaxation and creep responses of biological materials under spherical indentation considering surface tension

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-11 DOI: 10.1016/j.mechmat.2025.105257

Yue Ding , Wei-Ke Yuan , Xuan-Ming Liang , Xinrui Niu , Gang-Feng Wang

{"title":"Relaxation and creep responses of biological materials under spherical indentation considering surface tension","authors":"Yue Ding , Wei-Ke Yuan , Xuan-Ming Liang , Xinrui Niu , Gang-Feng Wang","doi":"10.1016/j.mechmat.2025.105257","DOIUrl":"10.1016/j.mechmat.2025.105257","url":null,"abstract":"<div><div>For soft biological materials, indentation has been extensively utilized to evaluate their viscoelastic properties. Nevertheless, the influence of surface tension has been scarcely considered in the analysis, which might lead to a misestimation of the viscoelastic properties. In this work, for the relaxation and creep of viscoelastic solids under spherical indentation, the impact of surface tension is investigated, and the explicit relation between load and indentation depth with surface tension is established. It is revealed that the existence of surface tension leads the apparent relaxation modulus to be higher than the real one for relaxation experiments, but the contrary tendency is observed for creep compliance in creep experiments. Moreover, the relationship between indentation depth and contact radius depends also on the material properties, distinct from the conventional viscoelastic models. Furthermore, a novel avenue is proposed to determine the viscoelastic properties and surface tension simultaneously. Our results are beneficial for understanding of surface tension on relaxation and creep responses, and greatly enhance the accuracy of evaluation on the mechanical properties of soft biological materials through indentations.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"202 ","pages":"Article 105257"},"PeriodicalIF":3.4,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179621","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}

引用次数: 0

Unusual temperature dependent core properties of <110> superdislocation in Ni3Al by ab initio results-informed fully discrete Peierls-Nabarro model

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-11 DOI: 10.1016/j.mechmat.2025.105254

Xiangsheng Hu , Guowei Zeng , Minsheng Huang , Yaxin Zhu , Lv Zhao , Zhenhuan Li , Fenglin Deng

{"title":"Unusual temperature dependent core properties of <110> superdislocation in Ni3Al by ab initio results-informed fully discrete Peierls-Nabarro model","authors":"Xiangsheng Hu , Guowei Zeng , Minsheng Huang , Yaxin Zhu , Lv Zhao , Zhenhuan Li , Fenglin Deng","doi":"10.1016/j.mechmat.2025.105254","DOIUrl":"10.1016/j.mechmat.2025.105254","url":null,"abstract":"<div><div>Using ab initio results-informed fully discrete Peierls-Nabarro (FDPN) model, temperature-dependent <110> superdislocation core properties are investigated for Ni<sub>3</sub>Al in the present work. A specific numerical method has been developed to solve the Landau equation of the FDPN model. Our results show that the density functional theory (DFT) can effectively calculate the <em>γ</em>-surface and elastic constants of Ni<sub>3</sub>Al over a wide temperature range of 0∼1200 K. It is found that the core energy of type the <em>I′</em> superdislocation is always lower than that of the type <em>I</em> within the considered temperature range, making the type <em>I′</em> configuration more energetically favorable. Furthermore, the splitting distances of both types exhibit an unexpected temperature dependency, with abrupt changes occurring at specific temperatures. With increasing temperature, the Peierls stresses for both types of superdislocations do not change monotonically, but vary in a sinusoidal-like or one-peak form. Such phenomenon may be attributed to the transition of superdislocation core structure between the O-mode and B-mode as the temperature changes. These findings allow for a deeper understanding of superdislocation evolution and corresponding temperature-dependent plastic behavior of Ni<sub>3</sub>Al.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"203 ","pages":"Article 105254"},"PeriodicalIF":3.4,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161111","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}

引用次数: 0

A buckling mechanics model for pattern transformation of lattice superstructures assembled by soft-hard materials integrated units

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-01-09 DOI: 10.1016/j.mechmat.2025.105253

Haozhe Zhang, Yuan Gao, Baoxing Xu

{"title":"A buckling mechanics model for pattern transformation of lattice superstructures assembled by soft-hard materials integrated units","authors":"Haozhe Zhang, Yuan Gao, Baoxing Xu","doi":"10.1016/j.mechmat.2025.105253","DOIUrl":"10.1016/j.mechmat.2025.105253","url":null,"abstract":"<div><div>Compression-induced sudden change of organizations and patterns in lattice structures composed of truss materials or granular colloids has been leveraged to design a broad variety of novel functional materials and structures. However, mechanics theory underlying these instabilities remains underexplored. Here, we report an instability phenomenon in lattice superstructures comprised of soft-hard materials integrated Janus structure units under an externally applied uniaxial compression in a rigid-walled constraint container and establish a constrained buckling mechanics model to describe the instability and its induced pattern transformation. Finite element analysis (FEA) shows that when these superstructures are compressed beyond a critical load, the assembly components of soft-hard materials integrated units begin to slide and rotate, leading to pattern transformation. We propose an instability mechanics framework of pattern transformation by developing a beam buckling model constrained laterally by a series of elastic springs. These spring constraints represent the contact status between adjacent soft-hard integrated units in the superstructures and are correlated with rotation of units. Theoretical predictions of both instability mode and pattern transformation agree well with FEA results. The effects of the initial orientation of individual units and assembly patterns of the superstructures are also discussed. This work provides a theoretical mechanics foundation to design superstructures with controllable pattern transformations by tailoring soft-hard materials integrated assembly components.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"202 ","pages":"Article 105253"},"PeriodicalIF":3.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200072","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}

引用次数: 0