European Journal of Mechanics A-Solids最新文献_第10页

Possible cohesive fracture path leading to the rapidest failure of ductile materials under dynamic tension 可能导致韧性材料在动拉作用下快速破坏的内聚断裂路径

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-24 DOI: 10.1016/j.euromechsol.2025.105811

Bian Xu , Hongsheng Yang , Zhenhua Song , Fenghua Zhou , Yuxuan Zheng

{"title":"Possible cohesive fracture path leading to the rapidest failure of ductile materials under dynamic tension","authors":"Bian Xu , Hongsheng Yang , Zhenhua Song , Fenghua Zhou , Yuxuan Zheng","doi":"10.1016/j.euromechsol.2025.105811","DOIUrl":"10.1016/j.euromechsol.2025.105811","url":null,"abstract":"<div><div>Fracture velocity for a solid undergoing high-rate plastic flow with an internal fracture depends on a cohesive fracture path at a fracture point and momentum transport process from the surrounding medium to a fracture point. Assuming a more complex nonlinear relationship between fracture cohesion and fracture opening displacement, fracture evolution under different damage models, critical fracture time, Mott wave propagation distance, and analytical or numerical solutions of the average size of fragments are derived in this study. A step-like cohesive fracture path leads to the quickest fracture process, with the step stress on the fracture point being 2/3 of its strength, while maintaining constant fracture strength and energy among all conceivable cohesive fracture paths. For a wide range of loading strain rates, the damage time had a minimum value regardless of the damage evolution path selected for material failure for various damage models. Results obtained in this study based on the principle of rapidest unloading provide a reference to study the intrinsic damage mechanisms in fracture processes.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105811"},"PeriodicalIF":4.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739384","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

Electromechanical modeling of localized micro-scale piezoelectric interaction at impact site 冲击现场局部微尺度压电相互作用的机电建模

IF 4.2 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-23 DOI: 10.1016/j.euromechsol.2025.105799

Milad Hasani , Sam Riahi , Alireza Rezania

{"title":"Electromechanical modeling of localized micro-scale piezoelectric interaction at impact site","authors":"Milad Hasani , Sam Riahi , Alireza Rezania","doi":"10.1016/j.euromechsol.2025.105799","DOIUrl":"10.1016/j.euromechsol.2025.105799","url":null,"abstract":"<div><div>The non-conformal contact between a moving spherical ball and a fixed piezoelectric layer results in a micro-scale contact area. This research investigates the localized micro-scale piezoelectric interaction at the contact area on the piezoelectric layer's electrical response under the impact excitation. The ball indentation causes time-variable 3D mechanical stress and electric displacement distributions around the impact site in the piezoelectric layer. In this study, an innovative semi-analytical model is developed that divides the piezoelectric layer into two zones. This technique enables 2D-axisymmetric analysis of non-axially symmetric patches, reducing computational complexity. The results indicate that a high-voltage zone appears beneath the contact area, which can significantly contribute to the piezoelectric's electrical response. For instance, under a specific impact excitation and electrical boundary condition, the peak voltage across the piezoelectric thickness reaches 600 V while the output voltage is 1 V. Validation and comparison against experimental tests and the FEM method confirm the accuracy and efficiency of this model in the prediction of piezoelectric's transient voltage signal and voltage peak applicable to energy harvesting and sensory applications. Finally, the developed model is applied in the practical optimization of an implantable energy harvester for biomedical applications.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105799"},"PeriodicalIF":4.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724007","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

Enhancing the creep resistance of 3D-printed polylactic acid at varied operating temperatures by heat treatment: An experimental and numerical analysis 通过热处理提高3d打印聚乳酸在不同工作温度下的抗蠕变性能：实验和数值分析

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-23 DOI: 10.1016/j.euromechsol.2025.105813

Siddharth Kumar , Shrushti Maheshwari , Arbinndo Sinha , Zafar Alam , Sarthak S. Singh

{"title":"Enhancing the creep resistance of 3D-printed polylactic acid at varied operating temperatures by heat treatment: An experimental and numerical analysis","authors":"Siddharth Kumar , Shrushti Maheshwari , Arbinndo Sinha , Zafar Alam , Sarthak S. Singh","doi":"10.1016/j.euromechsol.2025.105813","DOIUrl":"10.1016/j.euromechsol.2025.105813","url":null,"abstract":"<div><div>Creep deformation significantly affects polymer design, especially for polylactic acid (PLA), which is prone to deformation at high temperatures. This study investigates the impact of heat treatment as a post-processing technique on the short-term creep behavior of 3D-printed PLA, emphasizing the role of increased crystallinity in improving creep resistance. PLA samples were analyzed in untreated (UT) and heat-treated (HT) states at temperatures of 75 °C and 90 °C for varying curing durations, with differential scanning calorimetry employed to measure crystallinity levels. Creep tests conducted in tensile mode at room temperature (27 °C) revealed that the PLA sample heat-treated at 90 °C for 2 h (HT90(2h)) exhibited the highest resistance to creep deformation. Further evaluations at elevated temperatures (37 °C and 47 °C) indicated that HT90(2h) had a reduced creep rate than UT, with effectiveness enhanced by a factor of 1.85 at 47 °C. Increased crystallinity inhibits chain mobility in crystalline lamella, improving stiffness and creep resistance. A nonlinear viscoelastic Burgers model was utilized to predict the creep response under varying thermal and mechanical loads, with the model parameters dependent on crystallinity, stress, and temperature. The multi-curve optimization technique in MATLAB was used to analyze loading and unloading behavior at different stresses and temperatures. The linear viscoelastic Burgers model could trace the creep data at 27 °C, while the nonlinear version captured the creep response with increasing stress at elevated temperatures. Thus, heat treatment enhances PLA's creep resistance, improving its suitability for high-temperature, long-term mechanical applications.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105813"},"PeriodicalIF":4.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704261","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

Acoustic wave behavior in rotating functionally graded piezomagnetic media with impedance boundaries 具有阻抗边界的旋转功能梯度压磁介质中的声波行为

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-23 DOI: 10.1016/j.euromechsol.2025.105786

S. Guha , V. Gupta , M. Biswas , M. Mahanty , B.P. Sarangi , A. Haty , S. Nain

{"title":"Acoustic wave behavior in rotating functionally graded piezomagnetic media with impedance boundaries","authors":"S. Guha , V. Gupta , M. Biswas , M. Mahanty , B.P. Sarangi , A. Haty , S. Nain","doi":"10.1016/j.euromechsol.2025.105786","DOIUrl":"10.1016/j.euromechsol.2025.105786","url":null,"abstract":"<div><div>This study examines the reflection characteristics of coupled waves in a functionally graded piezomagnetic medium, incorporating rotational dynamics and impedance boundary conditions. A comprehensive theoretical framework is developed by integrating flexomagnetic coupling, strain gradient elasticity, micro-rotational inertia, and spatial material gradation. The surface is modeled with impedance-type boundary conditions to simulate realistic interface behaviors. A secular equation governing wave motion is derived, and the reflection characteristics of five distinct coupled wave modes are analyzed in terms of energy ratios, dispersion relations, and incidence angle variations. Numerical simulations demonstrate that both rotation and impedance boundaries significantly influence the redistribution of energy among reflected waves, while functional grading enhances anisotropic responses. The presence of rotational motion alters the dynamic coupling between wave modes, and impedance boundaries introduce partial energy absorption and phase shifts, offering refined control over wave propagation. These findings are especially relevant for designing advanced sensors, actuators, and surface acoustic wave (SAW) devices in magneto-electro-elastic systems. The study contributes a novel wave reflection framework by integrating functionally graded properties, rotational effects, and boundary impedance, offering new insights into energy transfer mechanisms under complex material and boundary conditions.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105786"},"PeriodicalIF":4.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704258","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

Schwarzite-inspired hybrid cellular structures for energy absorption applications 受schwarzite启发的混合细胞结构的能量吸收应用

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-17 DOI: 10.1016/j.euromechsol.2025.105775

V. Udaysankar , Sudhir Sastry Y.B. , N. Vu-Bac , S.R. Mahmoud , T. Rabczuk , P.R. Budarapu

{"title":"Schwarzite-inspired hybrid cellular structures for energy absorption applications","authors":"V. Udaysankar , Sudhir Sastry Y.B. , N. Vu-Bac , S.R. Mahmoud , T. Rabczuk , P.R. Budarapu","doi":"10.1016/j.euromechsol.2025.105775","DOIUrl":"10.1016/j.euromechsol.2025.105775","url":null,"abstract":"<div><div>Inspired by Schwarzites, a novel hybrid cellular structure is proposed for energy absorption applications. The Schwarzite-inspired unit cell is reinforced by introducing a stiffener in its open region, which is further enhanced by incorporating an extruded geometry (referred to as an “extruder”) within the stiffener to maximize energy absorption. Structural optimization is carried out using quasi-static crush analysis, leading to the selection of the optimized unit cell 2 (UC2) for all subsequent studies. The impact resistance of the proposed unit cell is evaluated through bullet impact simulations, targeting pre-selected weak points on a sandwich structure composed of a UC2 core and Aluminum faceplates. This configuration demonstrates resistance to bullet velocities of up to 115 m/s at arbitrary impact locations. Subsequently, the Aluminum faceplates are replaced with carbon fiber reinforced polymer (CFRP) faceplates featuring various ply orientations. The use of CFRP results in a maximum reduction in bullet penetration depth of 17.81%. Among the different configurations, the [0/90/0/90] cross-ply orientation exhibits the least penetration depth and is therefore recommended. Finally, air blast simulations are conducted on sandwich structures incorporating cores made from UC2, bamboo spiderweb (BS), hierarchical honeycomb (HH), and stiffened honeycomb (SH) designs. Among these, the UC2 core exhibits the highest bending stiffness and the lowest back-face deflection, indicating uniform structural stiffness. Consequently, this design eliminates the need for multi-stage layering or strategic core offsetting.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105775"},"PeriodicalIF":4.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686100","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

Hyperelastic nature of the Hoek–Brown criterion Hoek-Brown准则的超弹性性质

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-17 DOI: 10.1016/j.euromechsol.2025.105782

I. Fontana , G. Bacquaert , D.A. Di Pietro , K. Kazymyrenko

引用次数: 0

The vibration-collision behavior during the diaphragm's fracture in hypersonic impulse facilities 高超声速冲激装置中膜片断裂时的振动碰撞行为

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-16 DOI: 10.1016/j.euromechsol.2025.105789

Linjie Huang, Jiahao Zhang, Xia Song, Gun Li, Jiang Lai

引用次数: 0

Modeling the mechanical behavior of coated masonry elements using surface stress theory 用表面应力理论模拟涂覆砌体构件的力学行为

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-16 DOI: 10.1016/j.euromechsol.2025.105779

Simona Di Nino , Giuseppe Rosi , Francesco D’Annibale

引用次数: 0

Dynamic analysis and design optimization of hemispherical dielectric elastomer generator for efficient energy harvesting 半球形介质弹性体高效能量收集发生器的动态分析与优化设计

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-11 DOI: 10.1016/j.euromechsol.2025.105787

Aoyu Xiao , Demin Zhao , Zewen Gu , Jianlin Liu , Fuhao Liu

{"title":"Dynamic analysis and design optimization of hemispherical dielectric elastomer generator for efficient energy harvesting","authors":"Aoyu Xiao , Demin Zhao , Zewen Gu , Jianlin Liu , Fuhao Liu","doi":"10.1016/j.euromechsol.2025.105787","DOIUrl":"10.1016/j.euromechsol.2025.105787","url":null,"abstract":"<div><div>Dielectric elastomer energy generators (DEG), serving as efficient vibration energy harvesters, hold great potential in energy reuse and environmental energy exploitation. This study proposes a hemispherical DEG that employs pre-stretching and out-of-plane expansion deformation mode to achieve high-efficiency energy harvesting. For the proposed DEG, considering the viscoelasticity and electrostriction of DE materials, the study establishes a dynamic model of the hemispherical DEG based on the fractional viscoelastic model and the deformation-dependent electrostriction model. The model is then verified through experiments. Moreover, the influence of excitation parameters and structural parameters on the dynamic response of the proposed system is systematically investigated to better select the appropriate range of design parameters. Based on the established theoretical foundation, this paper leverages deep neural networks (DNN) combined with genetic algorithms (GA) to circumvent the complex dynamic solving process, and establishes a mapping relationship between multiple parameters and the energy output of the hemispherical DEG and seeks design solutions that maximize output power under different energy harvesting environmental conditions. This work provides new insights into the design and modeling of high-performance DEGs, which aids in the design and optimization of DEGs in low-frequency vibration environments.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105787"},"PeriodicalIF":4.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662996","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

Peridynamics modelling on corrosion fatigue behaviours of an iron-based alloy considering mechanochemical effects 考虑力学效应的铁基合金腐蚀疲劳行为的周动力学建模

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-07-10 DOI: 10.1016/j.euromechsol.2025.105785

Han Wang , Kai Huang , Weizhe Wang , Licheng Guo

{"title":"Peridynamics modelling on corrosion fatigue behaviours of an iron-based alloy considering mechanochemical effects","authors":"Han Wang , Kai Huang , Weizhe Wang , Licheng Guo","doi":"10.1016/j.euromechsol.2025.105785","DOIUrl":"10.1016/j.euromechsol.2025.105785","url":null,"abstract":"<div><div>The fatigue failure process is significantly accelerated in the presence of corrosion, a phenomenon widely observed in engineering practice. Accurately predicting the corrosion fatigue behaviours of materials remains challenging owing to the limited knowledge of the synergic effects of corrosion and fatigue loads. This paper proposes a new peridynamic simulation method to analyze corrosion fatigue problems based on authors' previous work, which considers mechanochemical effects to exhibit coupling between corrosion and material deformations. To validate the reasonability of the proposed method, corrosion fatigue tests on an iron-based (Fe-based) alloy are conducted to acquire experimental benchmarks. Then, numerical simulations based on the proposed method are conducted, whose results are compared with testing results, also simulation results obtained by previous simulation method. The proposed method not only provides accurate predictions on corrosion fatigue properties (the simulated fatigue limit is 249 MPa, the same with the tested one), but also increases accuracy on lifetime predictions by 66 % compared with authors’ previous work. The proposed method not only provides a unified simulation method in dealing with complex mechanical problems considering both continuity and discontinuity, such as corrosion fatigue, but also provides good accuracy in predictions of corrosion fatigue properties, making such method both theoretical-meaningful and engineering-practical.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"114 ","pages":"Article 105785"},"PeriodicalIF":4.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631108","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