Archive of Applied Mechanics最新文献_第9页

Peridynamic computations of wave propagation and reflection at material interfaces 波在材料界面传播和反射的周动力计算

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-22 DOI: 10.1007/s00419-024-02646-x

Kai Partmann, Manuel Dienst, Kerstin Weinberg

引用次数: 0

Simple diagnosis for layered structure using convolutional neural networks 利用卷积神经网络对分层结构进行简单诊断

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-21 DOI: 10.1007/s00419-024-02661-y

Daiki Tajiri, Tatsuru Hioki, Shozo Kawamura, Masami Matsubara

{"title":"Simple diagnosis for layered structure using convolutional neural networks","authors":"Daiki Tajiri, Tatsuru Hioki, Shozo Kawamura, Masami Matsubara","doi":"10.1007/s00419-024-02661-y","DOIUrl":"10.1007/s00419-024-02661-y","url":null,"abstract":"<div><p>In this study, we propose a structural health monitoring and diagnostic method for layered (multi-story) structures using a convolutional neural network (CNN). The proposed method is a primary diagnostic one, and its purpose is to allow quick identification of the location of an abnormality after detecting it. An abnormality is defined as a decrease in the stiffness characteristics (spring constant) of the outer wall of a multi-story structure when it deteriorates or is damaged. The proposed method has the following features. A modal circle is generated by multiplying the frequency response functions (FRFs) simulated by a mathematical model and the FRFs from the actual structure, in frequency space, and then a CNN learns the features of the abnormality from the modal circle and diagnoses it in the actual multi-story structure. We first verified the validity of the proposed method by considering a three-story structure as a numerical example. When the method was applied to three types of abnormal conditions, it was shown that the abnormal diagnosis could be performed correctly. Next, we constructed an experimental model of a three-story structure, and realized three types of abnormal conditions similar to those in the numerical model. We verified the applicability of the proposed method and showed that correct diagnosis of an abnormality was possible. Both the validity and applicability of the proposed method were thus confirmed.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 11","pages":"3135 - 3155"},"PeriodicalIF":2.2,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00419-024-02661-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction method for elastic modulus of resin-mineral composites considering the effects of pores and interfacial transition zones 考虑孔隙和界面过渡区影响的树脂-矿物复合材料弹性模量预测方法

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-20 DOI: 10.1007/s00419-024-02647-w

Hui Li, Hua Huang, Ruotong Wang, Huiyang Huang, Runlan Guo

{"title":"Prediction method for elastic modulus of resin-mineral composites considering the effects of pores and interfacial transition zones","authors":"Hui Li, Hua Huang, Ruotong Wang, Huiyang Huang, Runlan Guo","doi":"10.1007/s00419-024-02647-w","DOIUrl":"10.1007/s00419-024-02647-w","url":null,"abstract":"<div><p>Resin-mineral composite materials (RMC) have attracted much attention due to their excellent dynamic properties. However, the mechanical models related to RMC have not fully considered the complex interactions between components and interface transition zones (ITZ), and have also given less consideration to the influence of initial defects in the material, resulting in lower prediction accuracy of RMC mechanical models. To address the problem, based on composite sphere model, generalized autonomous method, and improved Mori–Tanaka method, the theoretical prediction model of RMC elastic modulus considering the influence of ITZ and pores is established in this study. Then, based on the micromechanical analysis method and combined with the theoretical data, the numerical prediction model of RMC elastic modulus considering the impact of pores and ITZ is founded. Furthermore, the influence of ITZ, pore, aggregate, and matrix parameters on the elastic modulus of RMC is investigated. The research results indicate that: (1) The error between the predicted RMC effective elastic modulus and the corresponding experimental values is within a reasonable range, indicating that the theoretical and numerical models proposed in this study are theoretically feasible. (2) ITZ and pore parameters have remarkable impact on the effective elastic modulus of RMC, indicating that it is indispensable to take into account ITZ and pores. (3) It is the elastic modulus of RMC that can be sensitive concerning the volume fraction and effective modulus of aggregate and matrix. The research results provide a theoretical basis for the design and application of RMC.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2859 - 2876"},"PeriodicalIF":2.2,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737473","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

Freeze-thaw effect-induced unidirectional extension of crack and rock fracture analysis 冻融效应引起的裂缝单向扩展与岩石断裂分析

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-20 DOI: 10.1007/s00419-024-02651-0

Tian Xiang, Wenhua Chen

{"title":"Freeze-thaw effect-induced unidirectional extension of crack and rock fracture analysis","authors":"Tian Xiang, Wenhua Chen","doi":"10.1007/s00419-024-02651-0","DOIUrl":"10.1007/s00419-024-02651-0","url":null,"abstract":"<div><p>In cold regions, the water in rock fissures may freeze due to external temperature, leading to crack expansion and propagation, which induces rock damage. In this work, the rock fracture due to uniaxial expansion of tension cracks under freezing conditions was studied, and different pressures acting on the crack surfaces were analyzed from the fracture mechanics perspective. The corresponding physical model was also developed. Considering the physical and mechanical degradation, the damage to fracture toughness caused by freeze-thaw cycles was determined, and improvements were made to the existing brittle phase field finite element model (PFM). Numerical simulations and calculations were carried out at different stages throughout the entire freeze-thaw cycle to obtain the crack expansion morphological features at different stages. The results showed that hydrostatic pressure and freezing pressure are the primary loads driving the crack expansion, with freezing pressure playing a dominant role, whereas hydrostatic pressure contributes relatively little. The freezing period is the main stage of crack expansion governing the crack morphology. The thawing period accelerates the crack propagation rate, leading to rock failure. Also, the inclination angle of cracks may significantly influence rock failure. In general, rock failure results from different combinations of the initiation, expansion and connection of primary cracks under freeze-thaw action .</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2921 - 2940"},"PeriodicalIF":2.2,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737475","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

Remeshing and eigenvalue stabilization in the finite cell method for structures undergoing large elastoplastic deformations 在有限单元法中对发生大弹塑性变形的结构进行重网格化和特征值稳定化处理

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-20 DOI: 10.1007/s00419-024-02644-z

Roman Sartorti, Wadhah Garhuom, Alexander Düster

引用次数: 0

Τuning the response of bubble-based metamaterials with short transient pulses 用短瞬态脉冲Τuning气泡超材料的响应

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-19 DOI: 10.1007/s00419-024-02655-w

Vicky Kyrimi

引用次数: 0

Memory impacts on skin tissue responses exposed to harmonic heat during thermal therapy 记忆对热疗过程中接触谐波热的皮肤组织反应的影响

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-18 DOI: 10.1007/s00419-024-02660-z

Rakhi Tiwari, Ahmed E. Abouelregal, Kiran Kumari, Pappu Kumar

{"title":"Memory impacts on skin tissue responses exposed to harmonic heat during thermal therapy","authors":"Rakhi Tiwari, Ahmed E. Abouelregal, Kiran Kumari, Pappu Kumar","doi":"10.1007/s00419-024-02660-z","DOIUrl":"10.1007/s00419-024-02660-z","url":null,"abstract":"<div><p>The present article contributes a new novel mathematical model influenced with the memory effect that endeavours to record the thermal responses inside a living tissue exposed to an oscillatory heat input on its outer surface. Heat transport inside the tissue is modelled with the hyperbolic equation involving three relaxation times. Analytical solutions of the significant field quantities—temperature, displacement and thermal stress are determined in the frequency domain by adopting the Laplace transform mechanism. Computational results are derived by inverting the field quantities from frequency domain to the physical domain. Memory influences are forecasted on the propagation of the thermo-mechanical waves inside the tissue by obtaining the influences of the kernel functions and time-delay quantity on the physical fields. Impact of the relaxation times is pronounced on the variances of the waves’ constituents. Graphical outcomes speculate that inclusion of the phase lags in heat transfer model supresses and stabilizes the speed of the waves. This study may support to the medical practitioners during thermal therapy and to develop the precised clinical equipment.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"3119 - 3134"},"PeriodicalIF":2.2,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737476","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

Moving crack caused by SH-wave propagating in a composite strip under distinct loading constraints 不同加载约束条件下复合材料带材中传播的 SH 波引起的移动裂纹

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-17 DOI: 10.1007/s00419-024-02649-8

Santan Kumar, Ram Prasad Yadav, Renu

{"title":"Moving crack caused by SH-wave propagating in a composite strip under distinct loading constraints","authors":"Santan Kumar, Ram Prasad Yadav,  Renu","doi":"10.1007/s00419-024-02649-8","DOIUrl":"10.1007/s00419-024-02649-8","url":null,"abstract":"<div><p>The crux of the present investigation is to come up with a mathematical model for the analysis of moving interfacial crack caused by SH-wave propagating in a composite strip featuring dissimilar orthotropic material. Wiener–Hopf methodology along with complex variable transform technique has been applied to determine the closed form analytical expression of SIF (stress intensity factor). Two different types of loading constraints, viz. NHL (non-harmonic loading) and HL (harmonic loading), on the edges of the crack have been studied. In addition to this, some special cases, viz. constant loading and stress free condition, following aforementioned loading constraints have also been taken into account for the moving crack in the considered composite strip. The limiting case for static condition leading to resonance-type phenomena has been presented for the subject under investigation. When computed numerically and depicted graphically, the profound impacts of distinct material and geometrical parameters on SIF for distinct loading constraints have also been manifested. The computational results bring out the fact that stress intensity factor falls off with rise in crack velocity when the edges of the crack are under NHL, whereas SIF shows reverse nature for HL.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2889 - 2908"},"PeriodicalIF":2.2,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717649","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

Analytical solutions for nonlinear axisymmetric deformations of circular plates by using innovative orthogonal power function series 利用创新的正交幂函数序列分析解决圆板的非线性轴对称变形问题

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-17 DOI: 10.1007/s00419-024-02648-9

Da-Guang Zhang

{"title":"Analytical solutions for nonlinear axisymmetric deformations of circular plates by using innovative orthogonal power function series","authors":"Da-Guang Zhang","doi":"10.1007/s00419-024-02648-9","DOIUrl":"10.1007/s00419-024-02648-9","url":null,"abstract":"<div><p>The primary objective of this paper is to introduce innovative orthogonal power function series aimed at obtaining accurate nonlinear analytical solutions for axisymmetric circular thin plates. The main features of this paper are as follows: The deflection is expanded by the innovative orthogonal power function series. The Airy stress function, which satisfies the geometric deformation compatibility equation, responds to the nonlinear coupling relationships between the plate deflection and the in-plane force or displacement boundary conditions. The nonlinear algebraic equations are obtained by the energy variational method. Many comparisons are made with the results of related researchers. The present accurate solutions not only allow the problems to be solved perfectly and provide the most reliable basis for engineering design but also set new benchmarks for the verification of various nonlinear numerical and approximate analytical solutions. The developed methodology represents a significant improvement, providing better accuracy and computational efficiency compared to historical approaches. Therefore, the present method is more worthy of promotion.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2877 - 2887"},"PeriodicalIF":2.2,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717704","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

An accurate and efficient method for calculating surface waves in one-dimensional ideal and defective semi-infinite periodic structures 计算一维理想和缺陷半无限周期结构中表面波的精确高效方法

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-17 DOI: 10.1007/s00419-024-02656-9

B. W. Yan, Z. F. Tang, Q. Gao

引用次数: 0