发布求助
文献互助 智能选刊 最新文献

Theoretical and Applied Mechanics Letters最新文献

筛选
英文 中文
Noise color influence on escape times in nonlinear oscillators - experimental and numerical results 噪声颜色对非线性振荡器逸出时间的影响——实验和数值结果
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-03-01 DOI: 10.1016/j.taml.2022.100420
Thomas Breunung, Balakumar Balachandran
{"title":"Noise color influence on escape times in nonlinear oscillators - experimental and numerical results","authors":"Thomas Breunung,&nbsp;Balakumar Balachandran","doi":"10.1016/j.taml.2022.100420","DOIUrl":"10.1016/j.taml.2022.100420","url":null,"abstract":"<div><p>The interplay between noise and nonlinearites can lead to escape dynamics. Associated nonlinear phenomena have been observed in various applications ranging from climatology to biology and engineering. For reasons of computational ease, in most studies, Gaussian white noise is used. However, this noise model is not physical due to the associated infinite energy content. Here, the authors present extensive experimental investigations and numerical simulations conducted to examine the impact of noise color on escape times in nonlinear oscillators. With a careful parameterization of the numerical simulations, the authors are able to make quantitative comparisons with experimental results. Through the experiments and simulations, it is illustrated that the noise color can drastically influence escape times and escape probability.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 2","pages":"Article 100420"},"PeriodicalIF":3.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46981440","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: 4
Modeling cell contractility responses to acoustic tweezing cytometry 模拟细胞对声学推特细胞术的收缩反应
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-03-01 DOI: 10.1016/j.taml.2022.100400
Suyan Zhang , Zhenzhen Fan
{"title":"Modeling cell contractility responses to acoustic tweezing cytometry","authors":"Suyan Zhang ,&nbsp;Zhenzhen Fan","doi":"10.1016/j.taml.2022.100400","DOIUrl":"10.1016/j.taml.2022.100400","url":null,"abstract":"<div><p>Acoustic tweezing cytometry (ATC) is a recently developed method for cell mechanics regulation. Targeted microbubbles, which are attached to integrins and subsequently the actin cytoskeleton, anchor, amplify and transmit the mechanical energy in an acoustic field inside the cells, eliciting prominent cytoskeleton contractile force increases in various cell types. We propose that a mechanochemical conversion mechanism is critical for the high efficiency of ATC to activate cell contractility responses. Our models predict key experimental observations. Moreover, we study the influences of ATC parameters (ultrasound center frequency, pulse repetition frequency, duty cycle, and acoustic pressure), cell areas, the number of ATC stimuli, and extracellular matrix rigidity on cell contractility responses to ATC. The simulation results suggest that it is large molecules, rather than small ions, that facilitate global responses to the local ATC stimulation, and the incorporation of visible stress fiber bundles improves the accuracy of modeling.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 2","pages":"Article 100400"},"PeriodicalIF":3.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47203076","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
Bayesian system identification and chaotic prediction from data for stochastic Mathieu-van der Pol-Duffing energy harvester 随机Mathieu van der Pol-Duffing能量采集器的贝叶斯系统辨识和混沌预测
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-03-01 DOI: 10.1016/j.taml.2022.100412
Di Liu, Shen Xu, Jinzhong Ma
{"title":"Bayesian system identification and chaotic prediction from data for stochastic Mathieu-van der Pol-Duffing energy harvester","authors":"Di Liu,&nbsp;Shen Xu,&nbsp;Jinzhong Ma","doi":"10.1016/j.taml.2022.100412","DOIUrl":"10.1016/j.taml.2022.100412","url":null,"abstract":"<div><p>In this paper, the approximate Bayesian computation combines the particle swarm optimization and sequential Monte Carlo methods, which identify the parameters of the Mathieu-van der Pol-Duffing chaotic energy harvester system. Then the proposed method is applied to estimate the coefficients of the chaotic model and the response output paths of the identified coefficients compared with the observed, which verifies the effectiveness of the proposed method. Finally, a partial response sample of the regular and chaotic responses, determined by the maximum Lyapunov exponent, is applied to detect whether chaotic motion occurs in them by a 0–1 test. This paper can provide a reference for data-based parameter identification and chaotic prediction of chaotic vibration energy harvester systems.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 2","pages":"Article 100412"},"PeriodicalIF":3.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48527741","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: 1
Hydrocephalic cerebrospinal fluid flowing rotationally with pulsatile boundaries: A mathematical simulation of the thermodynamical approach 以脉动边界旋转流动的脑积水脑脊液:热力学方法的数学模拟
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100418
Hemalatha Balasundaram , Senthamilselvi Sathyamoorthi , Unai Fernandez-Gamiz , Samad Noeiaghdam , Shyam Sundar Santra
{"title":"Hydrocephalic cerebrospinal fluid flowing rotationally with pulsatile boundaries: A mathematical simulation of the thermodynamical approach","authors":"Hemalatha Balasundaram ,&nbsp;Senthamilselvi Sathyamoorthi ,&nbsp;Unai Fernandez-Gamiz ,&nbsp;Samad Noeiaghdam ,&nbsp;Shyam Sundar Santra","doi":"10.1016/j.taml.2022.100418","DOIUrl":"10.1016/j.taml.2022.100418","url":null,"abstract":"<div><p>To study the kinematics of flow rate and ventricular dilatation, an analytical perturbation approach of hydrocephalus has been devised. This research provides a comprehensive investigation of the characteristics of cerebrospinal fluid (CSF) flow and pressure in a hydrocephalic patient. The influence of hydrocephalic CSF, flowing rotationally with realistic dynamical characteristics on pulsatile boundaries of subarachnoid space, was demonstrated using a nonlinear controlling system of CSF. An analytical perturbation method of hydrocephalus has been developed to investigate the biomechanics of fluid flow rate and the ventricular enlargement. In this paper presents a detailed analysis of CSF flow and pressure dynamics in a hydrocephalic patient. It was elaborated with a nonlinear governing model of CSF to show the influence of hydrocephalic CSF, flowing rotationally with realistic dynamical behaviors on pulsatile boundaries of subarachnoid space. In accordance with the suggested model, the elasticity factor changes depending on how much a porous layer, in this case the brain parenchyma, is stretched. It was improved to include the relaxation of internal mechanical stresses for various perturbation orders, modelling the potential plasticity of brain tissue. The initial geometry that was utilised to create the framework of CSF with pathological disease hydrocephalus and indeed the output of simulations using this model were compared to the actual progression of ventricular dimensions and shapes in patients. According to this observation, the non - linear and elastic mechanical phenomena incorporated into the current model are probably true. Further modelling of ventricular dilation at a normal pressure may benefit from the existence of a valid model whose parameters approximate genuine mechanical characteristics of the cerebral cortex.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100418"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42980853","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: 1
Assembly and disassembly mechanics of a spherical snap fit 球形卡扣配合的装配和拆卸机制
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100403
Xiao-Lin Guo, Bo-Hua Sun
{"title":"Assembly and disassembly mechanics of a spherical snap fit","authors":"Xiao-Lin Guo,&nbsp;Bo-Hua Sun","doi":"10.1016/j.taml.2022.100403","DOIUrl":"10.1016/j.taml.2022.100403","url":null,"abstract":"<div><p>The snap fit is a common mechanical mechanism. We have studied the spherical snap fit carefully for its physical asymmetry, which is easy to assemble but difficult to disassemble. Because of the complexity of spherical snap fit, it is difficult to get a theoretical formula to describe its physical asymmetry. In this paper, the pushing assembly and pulling disassembly of spherical snap fit are studied by both finite element analysis and experiments. The theoretical formulaes of spherical snap fit have been obtained based on numerical simulations and theoretical results of cylindrical snap fit.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100403"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45515887","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
Machine learning in mechanics 力学中的机器学习
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100416
Xiang Yang, Jianchun Wang
{"title":"Machine learning in mechanics","authors":"Xiang Yang,&nbsp;Jianchun Wang","doi":"10.1016/j.taml.2022.100416","DOIUrl":"10.1016/j.taml.2022.100416","url":null,"abstract":"","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100416"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44511303","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: 1
On interaction between freely moving bodies and fluid in a channel flow 通道流动中自由运动的物体与流体的相互作用
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100413
Qingsong Liu , Samire Yazar , Frank Smith
{"title":"On interaction between freely moving bodies and fluid in a channel flow","authors":"Qingsong Liu ,&nbsp;Samire Yazar ,&nbsp;Frank Smith","doi":"10.1016/j.taml.2022.100413","DOIUrl":"10.1016/j.taml.2022.100413","url":null,"abstract":"<div><p>The interaction between free fast-moving bodies (or particles) and the fluid surrounding them is studied, motivated by applications in different branches of industry, biomedicine, the environment and science such as flying droplets, ice growth, dust, impacts, food grains, sport, complexity and storms. New inviscid-based modelling and results on the behaviour of two interacting bodies inside a channel flow are described. This is followed by discussion of the more-bodies extension with a view to treating arrays of bodies in a rational manner. Significant dependences on initial conditions and on the comparative body masses and moments of inertia are found for the occurrence of body-body impacts as opposed to wall-body impacts and for the associated impact times.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100413"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43595025","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: 1
Exit problem of stochastic SIR model with limited medical resource 有限医疗资源下随机SIR模型的退出问题
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100393
Y.C. Mao, X.B. Liu
{"title":"Exit problem of stochastic SIR model with limited medical resource","authors":"Y.C. Mao,&nbsp;X.B. Liu","doi":"10.1016/j.taml.2022.100393","DOIUrl":"10.1016/j.taml.2022.100393","url":null,"abstract":"<div><p>Nonlinearity and randomness are both the essential attributes for the real world, and the case is the same for the models of infectious diseases, for which the deterministic models can not give a complete picture of the evolution. However, although there has been a lot of work on stochastic epidemic models, most of them focus mainly on qualitative properties, which makes us somewhat ignore the original meaning of the parameter value. In this paper we extend the classic susceptible-infectious-removed (SIR) epidemic model by adding a white noise excitation and then we utilize the large deviation theory to quantitatively study the long-term coexistence exit problem with epidemic. Finally, in order to extend the meaning of parameters in the corresponding deterministic system, we tentatively introduce two new thresholds which then prove rational.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100393"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43275758","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: 1
Stability analysis of the projectile based on random center manifold reduction 基于随机中心流形约简的弹丸稳定性分析
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100385
Yong Huang, Chunyan Yang
{"title":"Stability analysis of the projectile based on random center manifold reduction","authors":"Yong Huang,&nbsp;Chunyan Yang","doi":"10.1016/j.taml.2022.100385","DOIUrl":"10.1016/j.taml.2022.100385","url":null,"abstract":"<div><p>The center manifold method has been widely used in the field of stochastic dynamics as a dimensionality reduction method. This paper studied the angular motion stability of a projectile system under random disturbances. The random bifurcation of the projectile is studied using the idea of the Routh-Hurwitz stability criterion, the center manifold reduction, and the polar coordinates transformation. Then, an approximate analytical presentation for the stationary probability density function is found from the related Fokker–Planck equation. From the results, the random dynamical system of projectile generates three different dynamical behaviors with the changes of the bifurcation parameter and the noise strength, which can be a reference for projectile design.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100385"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47160729","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
A review on stress determination and control in metal-based additive manufacturing 金属基增材制造中应力测定与控制研究进展
IF 3.4 3区 工程技术
Theoretical and Applied Mechanics Letters Pub Date : 2023-01-01 DOI: 10.1016/j.taml.2022.100396
Haoyang Luo , Xing Sun , Le Xu , Wei He , Xiaoyu Liang
{"title":"A review on stress determination and control in metal-based additive manufacturing","authors":"Haoyang Luo ,&nbsp;Xing Sun ,&nbsp;Le Xu ,&nbsp;Wei He ,&nbsp;Xiaoyu Liang","doi":"10.1016/j.taml.2022.100396","DOIUrl":"10.1016/j.taml.2022.100396","url":null,"abstract":"<div><p>Metal additive manufacturing (MAM) is an emerging and disruptive technology that builds three-dimensional (3D) components by adding layer-upon-layer of metallic materials. The complex cyclic thermal history and highly localized energy can produce large temperature gradients, which will, in turn, lead to compressive and tensile stress during the MAM process and eventually result in residual stress. Being an issue of great concern, residual stress, which can cause distortion, delamination, cracking, etc., is considered a key mechanical quantity that affects the manufacturing quality and service performance of MAM parts. In this review paper, the ongoing work in the field of residual stress determination and control for MAM is described with a particular emphasis on the experimental measurement/control methods and numerical models. We also provide insight on what still requires to be achieved and the research opportunities and challenges.</p></div>","PeriodicalId":46902,"journal":{"name":"Theoretical and Applied Mechanics Letters","volume":"13 1","pages":"Article 100396"},"PeriodicalIF":3.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45544354","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: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信