European Journal of Mechanics A-Solids最新文献_第2页

Analysis of dynamic response of cracked gear system with structural coupling effect 考虑结构耦合效应的裂纹齿轮系统动态响应分析

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2026-01-22 DOI: 10.1016/j.euromechsol.2026.106037

Xiaosong Hu , Lei Wang , Qingsen Hu

{"title":"Analysis of dynamic response of cracked gear system with structural coupling effect","authors":"Xiaosong Hu , Lei Wang , Qingsen Hu","doi":"10.1016/j.euromechsol.2026.106037","DOIUrl":"10.1016/j.euromechsol.2026.106037","url":null,"abstract":"<div><div>Aiming at the problem of changes in the dynamic characteristics of the gear pair caused by crack propagation under the action of the coupling effect of the inter-tooth structure, a new analytical model for the stiffness of cracked teeth based on the potential energy method is proposed. The model analyses the difference in influence caused by the location of crack propagation and the degree of deterioration. Then an improved cracked gear pair dynamics model is established by integrating the crack and coupling effects. The dynamic characteristics of the gear system under the interaction of crack and structural coupling effects are revealed. The computational results are compared with the existing model and verified by finite element results. The results show that the structural coupling effect transforms the dynamic behaviour of the system and the change in the tooth load bearing region caused by crack propagation cannot be ignored. The proposed model provides more accurate mesh stiffness calculation and dynamic simulation, which provides a theoretical basis and valuable reference for the dynamic simulation and fault diagnosis of cracked gear systems.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106037"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parametric and multi-objective optimization analysis of cactus stem-inspired bionic multi-cell tubes for enhanced crashworthiness 仙人掌茎型仿生多细胞管抗撞性的参数化多目标优化分析

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2026-01-08 DOI: 10.1016/j.euromechsol.2026.106022

Daifeng Yang , Jianbo Chen , Yining Zhang , Perk Lin Chong , Eric Li

{"title":"Parametric and multi-objective optimization analysis of cactus stem-inspired bionic multi-cell tubes for enhanced crashworthiness","authors":"Daifeng Yang , Jianbo Chen , Yining Zhang , Perk Lin Chong , Eric Li","doi":"10.1016/j.euromechsol.2026.106022","DOIUrl":"10.1016/j.euromechsol.2026.106022","url":null,"abstract":"<div><div>This study extends our previous research on the cactus stem-inspired bionic multi-cell tube (CSBMT) by conducting a deeper investigation aimed at further enhancing its crashworthiness performance. Finite element analysis (FEA) was employed to investigate the energy absorption performance of CSBMT under varying geometric parameters, including the number of corners (<em>N</em>), inner diameter (<em>D</em><sub><em>i</em></sub>), and outer angle (<em>β</em>). Additional analyses examined the influence of oblique loading (0°–30°) and gradient wall thickness distributions (<em>n</em> = 0.2–5.0). The results indicate that increasing <em>N</em> and <em>D</em><sub><em>i</em></sub> significantly improves the specific energy absorption (SEA), while a larger <em>β</em> and smaller <em>n</em> enhance load uniformity and deformation stability. Compared with the baseline configuration, the optimal design achieved a 74.9 % improvement in SEA. Compared with 16 classical thin-walled energy-absorbing structures, the CSBMT exhibited superior energy absorption and load-bearing capacity under 20° oblique loading. Furthermore, a multi-objective structural optimization of the CSBMT was performed using the Non-dominated Sorting Genetic Algorithm II (NSGA-II), and a compromise solution was identified based on the minimum distance criterion. The optimized structure exhibited a well-balanced performance between energy absorption efficiency and peak load control. The findings provide valuable insights for the design of bio-inspired energy-absorbing structures in crashworthiness applications.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106022"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A finite-strain chemo-electro-mechanical model for gel polymer electrolytes with dynamic ion exchange between fluid and polymer phases 流体与聚合物相动态离子交换凝胶聚合物电解质的有限应变化学-机电模型

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2025-12-24 DOI: 10.1016/j.euromechsol.2025.105988

Mattia Serpelloni , Alberto Salvadori , Luigi Cabras

引用次数: 0

Influence of the sample shape factor on the dynamic characterization of viscoelastic properties: complex moduli and Poisson's ratio 样品形状因子对粘弹性动态特性的影响：复模量和泊松比

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2025-11-28 DOI: 10.1016/j.euromechsol.2025.105963

Julen Cortazar-Noguerol, Fernando Cortés, María Jesús Elejabarrieta

{"title":"Influence of the sample shape factor on the dynamic characterization of viscoelastic properties: complex moduli and Poisson's ratio","authors":"Julen Cortazar-Noguerol, Fernando Cortés, María Jesús Elejabarrieta","doi":"10.1016/j.euromechsol.2025.105963","DOIUrl":"10.1016/j.euromechsol.2025.105963","url":null,"abstract":"<div><div>This study investigates how the sample shape factor influences the dynamic properties characterization of a silicone rubber within the linear viscoelastic regime. The effective elastic properties of elastomers are known to depend on geometry, but the effect of shape factor on the dynamic response has not been systematically characterized. To address this, cylindrical samples with varying geometries are tested under dynamic compression and torsion. The results reveal that both the complex compressive and shear moduli are affected by shape factor, and that this influence varies with frequency. To quantify the influence of shape factor and extract the material's dynamic properties, a phenomenological correction model is formulated. The model introduces frequency-dependent parameters that account for the geometric effects on the effective moduli. These corrected moduli yield a complex Poisson's ratio that exhibits a slight frequency dependence, with a decreasing real part and an increasing loss factor. This approach enables both the quantification of geometry-induced effects in dynamic mechanical testing and the extraction of intrinsic material's viscoelastic properties.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 105963"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic analysis of a hub-FGM micro-beam based on meshless method in thermal environment 热环境下基于无网格法的轮毂- fgm微梁动力学分析

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2025-11-30 DOI: 10.1016/j.euromechsol.2025.105971

Du Chaofan , Xu Ningning , Li Liang , Yu Chuanbin , Zhang Dingguo

{"title":"Dynamic analysis of a hub-FGM micro-beam based on meshless method in thermal environment","authors":"Du Chaofan , Xu Ningning , Li Liang , Yu Chuanbin , Zhang Dingguo","doi":"10.1016/j.euromechsol.2025.105971","DOIUrl":"10.1016/j.euromechsol.2025.105971","url":null,"abstract":"<div><div>This study investigates the dynamic characteristics of rotating functionally graded material (FGM) micro-beams operating in a thermal environment, incorporating size effects, A high-order coupled dynamic model is established based on the modified couple stress theory. The formulation explicitly accounts for axial shortening induced by lateral deformation (nonlinear coupling deformation term) and employs the point interpolation method (PIM) and radial point interpolation method (RPIM) to discretize the deformation field of flexible micro-beams. Lagrange's equation of the second kind provides the governing equations. The influences of critical parameters including temperature field, rotational velocity profiles, the FGM gradient index, and size dependence are quantitatively examined. The simulation results demonstrate that thermal environment and size effect exert significant, non-negligible in influences on the dynamic analysis of FGM micro-beams. Furthermore, this study confirms the efficacy of meshless methods specifically PIM and RPIM, highlighting their potential for extension to rigid-flexible-thermal coupled multi-body system dynamics.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 105971"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damage detection in natural fiber composites using vibrational analysis and a curvature-based indicator 基于振动分析和曲率指示器的天然纤维复合材料损伤检测

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2025-12-31 DOI: 10.1016/j.euromechsol.2025.106013

Ons Lahbib, Nadia Massé, Ali El Hafidi, Philippe Leclaire

引用次数: 0

Estimation of local field statistics in highly filled composites based on an incremental mean-field homogenization scheme 基于增量平均场均匀化方案的高填充复合材料局部场统计估计

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2025-12-20 DOI: 10.1016/j.euromechsol.2025.106004

Éléonore Bourdier, Sophie Dartois, Rémi Cornaggia, Renald Brenner

{"title":"Estimation of local field statistics in highly filled composites based on an incremental mean-field homogenization scheme","authors":"Éléonore Bourdier, Sophie Dartois, Rémi Cornaggia, Renald Brenner","doi":"10.1016/j.euromechsol.2025.106004","DOIUrl":"10.1016/j.euromechsol.2025.106004","url":null,"abstract":"<div><div>This article addresses the estimation of local field statistics and effective properties of highly filled particulate composites. With this aim in view, use is made of the differential scheme in its incremental form. In this framework, accounting for the successive homogenization steps characteristic of the incremental process, we derive the expressions of first- and second-order moments of intraphase strain fields. For first-order moments, this involves the calculation of the localization tensors for each phase at each step. For the second-order moments, the approach relies on the application of the chain derivation rule throughout the process, making it possible to express the derivatives of the final effective properties as a function of the initial properties of the phases. These expressions have been validated by comparison with available analytical solution for isotropic porous media. Besides, more general microstructures have been considered with phases exhibiting high mechanical contrasts and for a wide range of volume fractions. The numerical results on local field statistics have been compared to other mean-field homogenization schemes, such as the Mori–Tanaka and Lielens models, as well as to full-field simulations on representative microstructures. These comparisons confirm the relevance of the proposed approach in the context of highly inclusionary media.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106004"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of active learning and MCMC sampling for efficient Bayesian calibration of mechanical properties 基于主动学习和MCMC采样的机械性能贝叶斯校正集成

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2026-01-12 DOI: 10.1016/j.euromechsol.2026.106015

Leon Riccius , Iuri B.C.M. Rocha , Joris Bierkens , Hanne Kekkonen , Frans P. van der Meer

{"title":"Integration of active learning and MCMC sampling for efficient Bayesian calibration of mechanical properties","authors":"Leon Riccius , Iuri B.C.M. Rocha , Joris Bierkens , Hanne Kekkonen , Frans P. van der Meer","doi":"10.1016/j.euromechsol.2026.106015","DOIUrl":"10.1016/j.euromechsol.2026.106015","url":null,"abstract":"<div><div>Recent advancements in Markov chain Monte Carlo (MCMC) sampling and surrogate modelling have significantly enhanced the feasibility of Bayesian analysis across engineering fields. However, the selection and integration of surrogate models and cutting-edge MCMC algorithms, often depend on ad-hoc decisions. A systematic assessment of their combined influence on accuracy and efficiency is notably lacking. The present work offers a comprehensive comparative study, employing a scalable case study in computational mechanics focused on the inference of spatially varying material parameters, that sheds light on the impact of methodological choices for surrogate modelling and sampling. We show that a priori training of the surrogate model introduces large errors in the posterior estimation even in low to moderate dimensions. We introduce a simple active learning strategy based on the path of the MCMC algorithm that is superior to all a priori trained models, and determine its training data requirements. We demonstrate that the choice of the MCMC algorithm has only a small influence on the amount of training data but no significant influence on the accuracy of the resulting surrogate model. Further, we show that the accuracy of the posterior estimation largely depends on the surrogate model, but not even a tailored surrogate guarantees convergence of the MCMC. Finally, we identify the forward model as the bottleneck in the inference process, not the MCMC algorithm. While related works focus on employing advanced MCMC algorithms, we demonstrate that the training data requirements render the surrogate modelling approach infeasible before the benefits of these gradient-based MCMC algorithms on cheap models can be reaped.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106015"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing the futuristic dielectric elastomer minimum energy structures using artificial neural networks (ANN) 基于人工神经网络的未来电介质弹性体最小能量结构设计

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI: 10.1016/j.euromechsol.2026.106034

Bhaskar Anupam, Keshav Purviya, Ankur Miglani, Aman Khurana

{"title":"Designing the futuristic dielectric elastomer minimum energy structures using artificial neural networks (ANN)","authors":"Bhaskar Anupam, Keshav Purviya, Ankur Miglani, Aman Khurana","doi":"10.1016/j.euromechsol.2026.106034","DOIUrl":"10.1016/j.euromechsol.2026.106034","url":null,"abstract":"<div><div>Dielectric elastomer minimum energy structures (DEMES) have gained significant attention for their ability to switch between multiple equilibrium states. These structures are formed when a pre-stretched elastomer film adheres to an inextensible frame and achieves equilibrium through energy minimization. Traditional methods for analyzing DEMES mechanics-numerical, theoretical, and experimental are often labor-intensive and time-consuming. This paper introduces the application of artificial neural network (ANN) techniques to predict the behavior of DEMES-based actuators efficiently. Using the Levenberg–Marquardt and Bayesian Regularization algorithms, the performance of two prototypes: the four-arm gripper and the flapping-wing actuator previously studied experimentally and numerically in <span><span>Khurana et al. (2024a)</span></span>, is predicted. The ANN-based approach demonstrates excellent agreement with the numerical results while significantly reducing computation time. This study highlights the potential of ANN techniques as a fast and reliable tool for the parametric evaluation of DEMES structures, streamlining the design and analysis process. Future applications of DEMES, enhanced by ANN-based predictive models, include the development of adaptive soft robotics, bio-inspired actuators, and energy-efficient morphing structures. These advancements could lead to intelligent material systems with real-time control capabilities for biomedical devices, aerospace engineering, and wearable technologies.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106034"},"PeriodicalIF":4.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of the soft behavior of nematic elastomers over a range of temperature and strain rates 向列弹性体在一定温度和应变速率下的软性能表征

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI: 10.1016/j.euromechsol.2026.106035

Alice Kutsyy , Adeline Wihardja , Victoria Lee , Kaushik Bhattacharya

引用次数: 0