Journal of Applied Mechanics最新文献_第7页

Wrinkling of Tympanic Membrane Under Unbalanced Pressure. 不平衡压力下鼓膜的起皱。

IF 2.6

Journal of Applied Mechanics Pub Date : 2017-04-01 Epub Date: 2017-02-08 DOI: 10.1115/1.4035858

Bo Wang, Pravarsha Ghanta, Sandra Vinnikova, Siyuan Bao, Junfeng Liang, Hongbing Lu, Shuodao Wang

引用次数: 5

Design of Stretchable Electronics Against Impact. 抗冲击可拉伸电子元件的设计。

IF 2.6

Journal of Applied Mechanics Pub Date : 2016-10-01 Epub Date: 2016-08-10 DOI: 10.1115/1.4034226

J H Yuan, M Pharr, X Feng, John A Rogers, Yonggang Huang

引用次数: 12

A Mechanics Model for Sensors Imperfectly Bonded to the Skin for Determination of the Young's Moduli of Epidermis and Dermis. 一种用于测定表皮和真皮层杨氏模量的与皮肤不完全结合传感器的力学模型。

IF 2.6

Journal of Applied Mechanics Pub Date : 2016-08-01 Epub Date: 2016-05-30 DOI: 10.1115/1.4033650

J H Yuan, Y Shi, M Pharr, X Feng, John A Rogers, Yonggang Huang

引用次数: 16

Effect of Fiber Crimp on the Elasticity of Random Fiber Networks With and Without Embedding Matrices. 纤维卷曲对有和无嵌入矩阵随机光纤网络弹性的影响。

IF 2.6

Journal of Applied Mechanics Pub Date : 2016-04-01 Epub Date: 2016-01-27 DOI: 10.1115/1.4032465

Ehsan Ban, Victor H Barocas, Mark S Shephard, Catalin R Picu

{"title":"Effect of Fiber Crimp on the Elasticity of Random Fiber Networks With and Without Embedding Matrices.","authors":"Ehsan Ban, Victor H Barocas, Mark S Shephard, Catalin R Picu","doi":"10.1115/1.4032465","DOIUrl":"https://doi.org/10.1115/1.4032465","url":null,"abstract":"Fiber networks are assemblies of one-dimensional elements representative of materials with fibrous microstructures such as collagen networks and synthetic nonwovens. The mechanics of random fiber networks has been the focus of numerous studies. However, fiber crimp has been explicitly represented only in few cases. In the present work, the mechanics of cross-linked networks with crimped athermal fibers, with and without an embedding elastic matrix, is studied. The dependence of the effective network stiffness on the fraction of nonstraight fibers and the relative crimp amplitude (or tortuosity) is studied using finite element simulations of networks with sinusoidally curved fibers. A semi-analytic model is developed to predict the dependence of network modulus on the crimp amplitude and the bounds of the stiffness reduction associated with the presence of crimp. The transition from the linear to the nonlinear elastic response of the network is rendered more gradual by the presence of crimp, and the effect of crimp on the network tangent stiffness decreases as strain increases. If the network is embedded in an elastic matrix, the effect of crimp becomes negligible even for very small, biologically relevant matrix stiffness values. However, the distribution of the maximum principal stress in the matrix becomes broader in the presence of crimp relative to the similar system with straight fibers, which indicates an increased probability of matrix failure.","PeriodicalId":508156,"journal":{"name":"Journal of Applied Mechanics","volume":"83 4","pages":"0410081-410087"},"PeriodicalIF":2.6,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4032465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34580224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Analytical Solution for Whirling Speeds and Mode Shapes of a Distributed-Mass Shaft With Arbitrary Rigid Disks. 任意刚盘分布质量轴的转速和振型解析解。

IF 2.6

Journal of Applied Mechanics Pub Date : 2014-03-01 Epub Date: 2013-09-19 DOI: 10.1115/1.4024670

Jong-Shyong Wu, Foung-Tang Lin, Huei-Jou Shaw

引用次数: 17

Modeling of Interior Ballistic Gas-Solid Flow Using a Coupled Computational Fluid Dynamics-Discrete Element Method. 基于计算流体动力学-离散元耦合方法的内弹道气固流动建模。

IF 2.6

Journal of Applied Mechanics Pub Date : 2013-05-01 Epub Date: 2013-04-19 DOI: 10.1115/1.4023313

Cheng Cheng, Xiaobing Zhang

{"title":"Modeling of Interior Ballistic Gas-Solid Flow Using a Coupled Computational Fluid Dynamics-Discrete Element Method.","authors":"Cheng Cheng, Xiaobing Zhang","doi":"10.1115/1.4023313","DOIUrl":"https://doi.org/10.1115/1.4023313","url":null,"abstract":"In conventional models for two-phase reactive flow of interior ballistic, the dynamic collision phenomenon of particles is neglected or empirically simplified. However, the particle collision between particles may play an important role in dilute two-phase flow because the distribution of particles is extremely nonuniform. The collision force may be one of the key factors to influence the particle movement. This paper presents the CFD-DEM approach for simulation of interior ballistic two-phase flow considering the dynamic collision process. The gas phase is treated as a Eulerian continuum and described by a computational fluid dynamic method (CFD). The solid phase is modeled by discrete element method (DEM) using a soft sphere approach for the particle collision dynamic. The model takes into account grain combustion, particle-particle collisions, particle-wall collisions, interphase drag and heat transfer between gas and solid phases. The continuous gas phase equations are discretized in finite volume form and solved by the AUSM+-up scheme with the higher order accurate reconstruction method. Translational and rotational motions of discrete particles are solved by explicit time integrations. The direct mapping contact detection algorithm is used. The multigrid method is applied in the void fraction calculation, the contact detection procedure, and CFD solving procedure. Several verification tests demonstrate the accuracy and reliability of this approach. The simulation of an experimental igniter device in open air shows good agreement between the model and experimental measurements. This paper has implications for improving the ability to capture the complex physics phenomena of two-phase flow during the interior ballistic cycle and to predict dynamic collision phenomena at the individual particle scale.","PeriodicalId":508156,"journal":{"name":"Journal of Applied Mechanics","volume":"80 3","pages":"0314031-314036"},"PeriodicalIF":2.6,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4023313","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32394103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

A Two-Scale Computational Model of pH-Sensitive Expansive Porous Media. ph敏感膨胀多孔介质的双尺度计算模型。

IF 2.6

Journal of Applied Mechanics Pub Date : 2013-03-01 Epub Date: 2013-02-04 DOI: 10.1115/1.4023011

Ranena V Ponce F, Márcio A Murad, Sidarta A Lima

{"title":"A Two-Scale Computational Model of pH-Sensitive Expansive Porous Media.","authors":"Ranena V Ponce F, Márcio A Murad, Sidarta A Lima","doi":"10.1115/1.4023011","DOIUrl":"https://doi.org/10.1115/1.4023011","url":null,"abstract":"We propose a new two-scale model to compute the swelling pressure in colloidal systems with microstructure sensitive to pH changes from an outer bulk fluid in thermodynamic equilibrium with the electrolyte solution in the nanopores. The model is based on establishing the microscopic pore scale governing equations for a biphasic porous medium composed of surface charged macromolecules saturated by the aqueous electrolyte solution containing four monovalent ions [Formula: see text]. Ion exchange reactions occur at the surface of the particles leading to a pH-dependent surface charge density, giving rise to a nonlinear Neumann condition for the Poisson-Boltzmann problem for the electric double layer potential. The homogenization procedure, based on formal matched asymptotic expansions, is applied to up-scale the pore-scale model to the macroscale. Modified forms of Terzaghi's effective stress principle and mass balance of the solid phase, including a disjoining stress tensor and electrochemical compressibility, are rigorously derived from the upscaling procedure. New constitutive laws are constructed for these quantities incorporating the pH-dependency. The two-scale model is discretized by the finite element method and applied to numerically simulate a free swelling experiment induced by chemical stimulation of the external bulk solution.","PeriodicalId":508156,"journal":{"name":"Journal of Applied Mechanics","volume":"80 2","pages":"0209031-2090314"},"PeriodicalIF":2.6,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4023011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32394099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Analytical Study of Two Pin-Loaded Holes in Unidirectional Fiber-Reinforced Composites. 单向纤维增强复合材料中两个针脚加载孔的分析研究。

IF 2.6

Journal of Applied Mechanics Pub Date : 2013-03-01 Epub Date: 2013-01-22 DOI: 10.1115/1.4007226

Mohammad Mahdi Attar

引用次数: 15

Analytical Study of a Pin-Loaded Hole in Unidirectional Laminated Composites With Triangular and Circular Fibers. 三角形和圆形纤维单向层合复合材料针脚加载孔的分析研究。

IF 2.6

Journal of Applied Mechanics Pub Date : 2013-03-01 Epub Date: 2013-01-25 DOI: 10.1115/1.4007212

Hossein Robati, Mohammad Mahdi Attar

引用次数: 11

Highly Nonlinear Solitary Waves for the Assessment of Dental Implant Mobility. 高度非线性孤立波在牙种植体移动性评估中的应用。