Acta Mechanica Solida Sinica最新文献

Three-Dimensional Phase-Field Simulation of Stress-Assisted Two-Way Shape Memory Effect and Its Cyclic Degradation of Single-Crystal NiTi Shape Memory Alloy

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-09-25 DOI: 10.1007/s10338-024-00504-5

Bo Xu, Chao Yu, Chong Wang, Qingyuan Wang, Guozheng Kang

{"title":"Three-Dimensional Phase-Field Simulation of Stress-Assisted Two-Way Shape Memory Effect and Its Cyclic Degradation of Single-Crystal NiTi Shape Memory Alloy","authors":"Bo Xu, Chao Yu, Chong Wang, Qingyuan Wang, Guozheng Kang","doi":"10.1007/s10338-024-00504-5","DOIUrl":"10.1007/s10338-024-00504-5","url":null,"abstract":"<div><p>In this work, a three-dimensional crystal-plasticity-based phase-field model considering three kinds of inelastic deformation mechanisms, i.e., martensitic transformation, dislocation slip in austenite, and dislocation slip in martensite, is established to simulate the stress-assisted two-way shape memory effect (SATWSME) of NiTi single crystals and its cyclic degradation. The simulation results show that the ability of the SATWSME of NiTi single crystal increases as increasing the constant stress in the range discussed in this work (10–100 MPa), which is due to the increase of reoriented martensite formed in the cooling process due to the enhanced variant-selection capability of increased constant stress. The martensitic transformation and its reverse in the cyclic process reflecting the SATWSME show more and more obvious localization characteristics, resulting in the accumulation of significantly heterogeneous plastic deformation (mainly caused by the dislocation slip in austenite), which leads to the cyclic degradation of SATWSME. The simulation results and the conclusions drawn from this work are helpful for further understanding the mechanism of functional cyclic degradation of NiTi alloys.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"37 6","pages":"858 - 872"},"PeriodicalIF":2.0,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Coupling Effects and Resonant Characteristics of Rotating Composite Thin-Walled Beams in Hygrothermal Environments 湿热环境中旋转复合薄壁梁的耦合效应和共振特性

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-09-19 DOI: 10.1007/s10338-024-00516-1

Ling Yuan, Liang Li, Weidong Zhu, Long Wang, Xiaoyu Lu, Yinghui Li

引用次数: 0

Nonlinear Bending of FG-CNTR Curved Nanobeams in Thermal Environments 热环境中 FG-CNTR 弯曲纳米梁的非线性弯曲

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-09-09 DOI: 10.1007/s10338-024-00524-1

Yuanyuan Zhang, Yanxin Li, Guoyong Zhang, Xin Zhang

引用次数: 0

Coupled Solutions for Two-Dimensional Decagonal Piezoelectric Quasicrystals with Cracks 有裂缝的二维十边形压电准晶体的耦合解

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-09-06 DOI: 10.1007/s10338-024-00517-0

Xiang Mu, Zhaowei Zhu, Liangliang Zhang, Yang Gao

引用次数: 0

Deep-Learning-Coupled Numerical Optimization Method for Designing Geometric Structure and Insertion-Withdrawal Force of Press-Fit Connector 设计压入式连接器几何结构和插拔力的深度学习耦合数值优化方法

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-30 DOI: 10.1007/s10338-024-00521-4

Mingzhi Wang, Bingyu Hou, Weidong Wang

{"title":"Deep-Learning-Coupled Numerical Optimization Method for Designing Geometric Structure and Insertion-Withdrawal Force of Press-Fit Connector","authors":"Mingzhi Wang, Bingyu Hou, Weidong Wang","doi":"10.1007/s10338-024-00521-4","DOIUrl":"https://doi.org/10.1007/s10338-024-00521-4","url":null,"abstract":"<p>The press-fit connector is a typical plug-and-play solderless connection, and it is widely used in signal transmission in fields such as communication and automotive devices. This paper focuses on inverse designing and optimization of geometric structure, as well as insertion-withdrawal forces of press-fit connector using artificial neural network (ANN)-assisted optimization method. The ANN model is established to approximate the relationship between geometric parameters and insertion-withdrawal forces, of which hyper-parameters of neural network are optimized to improve model performance. Two numerical methods are proposed for inverse designing structural parameters (Model-I) and multi-objective optimization of insertion-withdrawal forces (Model-II) of press-fit connector. In Model-I, a method for inverse designing structure parameters is established, of which an ANN model is coupled with single-objective optimization algorithm. The objective function is established, the inverse problem is solved, and effectiveness is verified. In Model-II, a multi-objective optimization method is proposed, of which an ANN model is coupled with genetic algorithm. The Pareto solution sets of insertion-withdrawal forces are obtained, and results are analyzed. The established ANN-coupled numerical optimization methods are beneficial for improving the design efficiency, and enhancing the connection reliability of the press-fit connector.</p>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"2015 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Size-Dependent Analysis of Strain Energy Release Rate of Buckling Delamination Based on the Modified Couple Stress Theory 基于修正耦合应力理论的屈曲分层应变能释放率尺寸依赖性分析

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-29 DOI: 10.1007/s10338-024-00520-5

Siyu He, Feixiang Tang, Xiuming Liu, Zhongjie Gao, Fang Dong, Sheng Liu

{"title":"Size-Dependent Analysis of Strain Energy Release Rate of Buckling Delamination Based on the Modified Couple Stress Theory","authors":"Siyu He, Feixiang Tang, Xiuming Liu, Zhongjie Gao, Fang Dong, Sheng Liu","doi":"10.1007/s10338-024-00520-5","DOIUrl":"10.1007/s10338-024-00520-5","url":null,"abstract":"<div><p>In micro-electro-mechanical systems, interface expansion issues are commonly encountered, and due to their small size, they often exist at the micro- or nano-scale. The influence of the micro-structural effect on interface mechanics cannot be ignored. This paper focuses on studying the impact of micro-structural effect on interface crack propagation. Modified couple stress theory (MCST) is used to study the buckling delamination of ultra-thin film-substrate systems. The equivalent elastic modulus (EEM) and equivalent flexural rigidity (EFR) are derived based on MCST. Substituting EEM and EFR into the classical Kirchhoff plate theory, the governing equations of ultra-thin film-substrate system with micro-structural effect can be obtained. The finite element method (FEM) was used to calculate the critical strain energy release rate for crack extension. Differences between the three theoretical approaches of MCST, classical theory (CT), and FEM were compared. The effects of stress ratio <span>(frac{sigma }{{sigma_{c} }})</span>, initial crack length, film thickness, and micro-structural effect parameters on crack extension were analyzed. The results show that the FEM calculations coincide with the CT calculations. The stress ratio <span>(frac{sigma }{{sigma_{c} }})</span>, initial crack length, film thickness, and micro-structural effect parameters have significantly influence crack extension.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"37 6","pages":"989 - 1002"},"PeriodicalIF":2.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Modeling of Sandwich MRE Resonator and Band Gap Adjustment of Metamaterial Beam 三明治 MRE 谐振器建模与超材料光束带隙调整

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-28 DOI: 10.1007/s10338-024-00500-9

Zhihong Gao, Xueyi Zhang, Yu Xue, Jinhui Liu, Jinqiang Li, Zhiguang Song

引用次数: 0

Effects of Strain and Strain Rates on Microstructure Evolution Within ASB of TC4 应变和应变速率对 TC4 ASB 内部微观结构演变的影响

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-27 DOI: 10.1007/s10338-024-00518-z

Qiang Zhou, Qilin Xiong, Zhaoquan Zeng

{"title":"Effects of Strain and Strain Rates on Microstructure Evolution Within ASB of TC4","authors":"Qiang Zhou, Qilin Xiong, Zhaoquan Zeng","doi":"10.1007/s10338-024-00518-z","DOIUrl":"10.1007/s10338-024-00518-z","url":null,"abstract":"<div><p>Adiabatic shear band (ASB), a typical failure mechanism in a metal at high strain rates, is hardly controllable or predictable to some extent. The development of the microstructure plays a crucial role in its formation. In this paper, the effect of strain rate on the development of microstructure in ASB of titanium alloy TC4 is investigated using hat-shaped specimens with the split-Hopkinson pressure bar device. The results show that the fracture strength of TC4 is significantly dependent on the shear strain rate. The increase in fracture strength from a strain rate of 11,300 s<sup>−1</sup> to 24,930 s<sup>−1</sup> is much higher than that from 24,930 s<sup>−1</sup> to 35,620 s<sup>−1</sup>, which can be attributed to the effect of strain rate on dislocation evolution. Microstructures in both as-received and deformed states are investigated using various characterization techniques such as electron backscatter diffraction and X-ray diffraction. The region of ASB clearly shows three different microstructural features: random distribution of coarse grains (as received), distribution of elongated grains (transition zone), and distribution of equiaxed nanocrystals (shear-localized zone). The width of ASB increases with the strain rate. The possible reason for this is that the higher the strain rate, the larger the region where dynamic recrystallization (DRX) occurs due to the accumulation of a large number of dislocations. In the middle of ASB, a significant decrease in low-angle grain boundaries (LAGBs) and a large increase in high-angle grain boundaries are observed. The texture of specimens, especially the {11–20} and {10–10} planes, changes significantly during shear deformation at high strain rates. The mechanism of continuous dynamic recrystallization can well explain the formation and evolution of DRX within the ASB.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"37 6","pages":"958 - 966"},"PeriodicalIF":2.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Coupled Thermo-Mechanical Peridynamics Simulation for Analyzing Failure of ECC Under High-Temperature Loads 用于分析高温载荷下 ECC 故障的热机械周流体力学耦合模拟

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-20 DOI: 10.1007/s10338-024-00502-7

Xihong Zhang, Keyan Li, Jiyu Tang, Zhanqi Cheng

引用次数: 0

The Analysis of Bending of an Elastic Beam Resting on a Nonlinear Winkler Foundation with the Galerkin Method 用 Galerkin 方法分析非线性温克勒地基上弹性梁的弯曲情况

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-20 DOI: 10.1007/s10338-024-00515-2

Chuanshu Wei, Huimin Jing, Aibing Zhang, Bin Huang, Gamal M. Ismail, Ji Wang

{"title":"The Analysis of Bending of an Elastic Beam Resting on a Nonlinear Winkler Foundation with the Galerkin Method","authors":"Chuanshu Wei, Huimin Jing, Aibing Zhang, Bin Huang, Gamal M. Ismail, Ji Wang","doi":"10.1007/s10338-024-00515-2","DOIUrl":"10.1007/s10338-024-00515-2","url":null,"abstract":"<div><p>Elastic beams resting on an elastic foundation are frequently encountered in civil, mechanical, aeronautical, and other engineering disciplines, and the analysis of static and dynamic deflections is one of the essential requirements related to various applications. The Galerkin method is a classical mathematical method for solving differential equations without a closed-form solution with a wide range of applications in engineering and scientific fields. In this study, a demonstration is presented to solve the nonlinear differential equation by transforming it into a series of nonlinear algebraic equations with the Galerkin method for asymptotic solutions in series, and the nonlinear deformation of beams resting on the nonlinear foundation is successfully solved as an example. The approximate solutions based on trigonometric functions are utilized, and the nonlinear algebraic equations are solved both numerically and iteratively. Although widely used in linear problems, it is worth reminding that the Galerkin method also provides an effective approach in dealing with increasingly complex nonlinear equations in practical applications with the aid of powerful tools for symbolic manipulation of nonlinear algebraic equations.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"37 6","pages":"903 - 909"},"PeriodicalIF":2.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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