Journal of Applied Mechanics-Transactions of the Asme最新文献_第10页

Equilibrium Violation from the Complex Stiffness 复合刚度的平衡破坏

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-04-05 DOI: 10.1115/1.4062263

N. Makris

引用次数: 0

Self-equilibrium, Mechanism Stiffness, and Self-stress Design of General Tensegrity with Rigid Bodies or Supports: A Unified Analysis Approach 具有刚体或支承的一般张紧度的自平衡、机构刚度和自应力设计：一种统一的分析方法

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-29 DOI: 10.1115/1.4062225

Yafeng Wang, Xian Xu, Yaozhi Luo

{"title":"Self-equilibrium, Mechanism Stiffness, and Self-stress Design of General Tensegrity with Rigid Bodies or Supports: A Unified Analysis Approach","authors":"Yafeng Wang, Xian Xu, Yaozhi Luo","doi":"10.1115/1.4062225","DOIUrl":"https://doi.org/10.1115/1.4062225","url":null,"abstract":"\u0000 The use of general tensegrity systems that incorporate rigid bodies beyond axially loaded members has garnered increasing attention in practical applications. Recent preliminary studies have been conducted on the analysis and form design of general tensegrity systems with disconnecting rigid bodies. However, existing methods cannot account for connections between different rigid bodies. In practical applications, general tensegrity systems may have interconnected rigid bodies, rendering the analysis method proposed in previous studies inapplicable. To address this issue, this work proposes a comprehensive and unified analysis method for general tensegrity systems. The proposed formulation allows for the incorporation of connections between rigid bodies and general tensegrity systems with supports into the developed framework, enabling uniform analysis. Equilibrium and compatibility equations are derived through an energy approach combined with the Lagrange multiplier method. Self-stress states and mechanism modes are then computed based on these formulations. The stiffness of the mechanism mode is analyzed and validated using both the product force method and the reduced geometric stiffness matrix method. Furthermore, a prestress design approach based on Semi-Definite Programming (SDP) is proposed to determine feasible member forces that can stabilize general tensegrity systems. Illustrative examples are presented to verify the effectiveness of the proposed approach. This study expands the scope of the analysis theory for tensegrity systems and provides a fundamental and unified analysis approach that can be applied to any type of tensegrity system.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45426222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

QUANTIFICATION OF URETERAL PAIN SENSATION INDUCED BY KIDNEY STONE 肾结石所致输尿管疼痛感觉的定量测定

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-29 DOI: 10.1115/1.4062222

Yonggang Liu, Shaobao Liu, Moxiao Li, T. Lu

{"title":"QUANTIFICATION OF URETERAL PAIN SENSATION INDUCED BY KIDNEY STONE","authors":"Yonggang Liu, Shaobao Liu, Moxiao Li, T. Lu","doi":"10.1115/1.4062222","DOIUrl":"https://doi.org/10.1115/1.4062222","url":null,"abstract":"\u0000 Pain sensation induced by kidney stone (renal calculi) in ureter, a kind of visceral ducts connecting the kidneys and bladder, critically depends upon the relative size of stone to ureter. To quantify such pain sensation, we draw a parallel analogy between the mechanisms underlying skin/teeth thermal pain (which can be quantified with a holistic pain model consisting of modified Hodgkin-Huxley model and gate control theory) and mechanism of ureteral pain to extend the holistic pain model to stone-blocked ureter. We then perform finite element simulations to obtain key mechanical stresses on ureter wall exerted by a kidney stone having varying size. These stresses are subsequently adopted to calculate the voltage potential of neuron membrane in the holistic pain model and eventually a theoretical framework to quantify the dependence of ureteral pain sensation on stone size is established, for the first time. We demonstrate that ureter pain sensation increases sharply when the diameter of kidney stone becomes 7.5% to 20% larger than the inner diameter of ureter, peaking at ~20% larger; however, increasing further the stone diameter leads only to marginally exacerbated pain sensation. Other related effects on ureter pain sensation, such as ureter wall thickness, ureter stiffness, and intra-abdominal pressure (IAP), are evaluated. Results of the present study provide insightful information for urologists to diagnose and treat patients with renal calculi in a more personalized way.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44227700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Leveraging Dynamics-Induced Snap-Through Instabilities to Access Giant Deformations in Dielectric Elastomer Membranes 利用动态诱导的Snap-Through不稳定性来获取介电弹性体膜中的巨大变形

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-29 DOI: 10.1115/1.4062224

Christopher Cooley, R. Lowe

{"title":"Leveraging Dynamics-Induced Snap-Through Instabilities to Access Giant Deformations in Dielectric Elastomer Membranes","authors":"Christopher Cooley, R. Lowe","doi":"10.1115/1.4062224","DOIUrl":"https://doi.org/10.1115/1.4062224","url":null,"abstract":"\u0000 Achieving extreme deformations without electrical breakdown has been a longstanding challenge in the dielectric elastomer community. In this paper, we present a novel approach for accessing giant in-plane stretches in circular dielectric elastomer membranes by leveraging nonlinear dynamics, specifically short-duration voltage pulses. These voltage pulses – applied about nominal bias voltages where the large-stretch equilibrium does not experience dielectric breakdown – create transient stretches that, if sufficiently large, cause the membrane to dynamically snap-through to its large-stretch equilibrium. These giant deformations are reversible; pulsed voltage drops can return the membrane from its large-stretch equilibrium to its small-stretch equilibrium. Parametric analyses are used to determine combinations of pulse amplitude and duration that result in snap-through. Corresponding through-thickness electric fields are shown to be below stretch-dependent dielectric strengths from the literature, suggesting practical feasibility. Unlike other techniques for accessing extreme stretches in dielectric elastomers, the present approach relies on voltage control alone; it therefore does not require altering the external mechanical forces that cause pre-stretch and can be applied without modifying the elastomer's mechanical compliance. This research demonstrates that carefully designed voltage pulses may permit existing and emerging soft material technologies to access extreme, large-stretch equilibria without dielectric breakdown.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42759976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Asymptotically Accurate Analytical Solution for Timoshenko-like Deformation of Functionally Graded Beams 梯度梁类Timoshenko变形的渐近精确解析解

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-29 DOI: 10.1115/1.4062223

Amandeep, Satwinder Singh, S. Padhee

引用次数: 1

Curved Ring Origami: Bistable Elastic Folding for Magic Pattern Reconfigurations 曲环折纸：用于魔术图案重构的双稳态弹性折叠

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-29 DOI: 10.1115/1.4062221

Jize Dai, Lu Lu, Sophie Leanza, J. Hutchinson, R. Zhao

{"title":"Curved Ring Origami: Bistable Elastic Folding for Magic Pattern Reconfigurations","authors":"Jize Dai, Lu Lu, Sophie Leanza, J. Hutchinson, R. Zhao","doi":"10.1115/1.4062221","DOIUrl":"https://doi.org/10.1115/1.4062221","url":null,"abstract":"\u0000 Ring origami has emerged as a robust strategy for designing foldable and deployable structures due to its impressive packing abilities achieved from the snap-folding mechanism. In general, polygonal rings with rationally designed geometric parameters can fold into compacted three-loop configurations with curved segments, which result from the internal bending moment in the folded state. Inspired by the internal bending moment-induced curvature in the folded state, we explore how this curvature can be tuned by introducing initial natural curvature to the segments of the polygonal rings in their deployed stress-free state, and study how this initial curvature affects their folded configurations. Taking a clue from straight-segmented polygonal rings that fold into overlapping curved loops, we find it is possible to reverse the process by introducing curvature into the ring segments in the stress-free initial state such that the rings fold into a straight-line looped pattern with “zero” area. This realizes extreme packing. In this work, by a combination of experimental observation, finite element analysis, and theoretical modeling, we systematically study the effect of segment curvature on folding behavior, folded configurations, and packing of curved ring origami with different geometries. It is anticipated that curved ring origami can open a new avenue for the design of foldable and deployable structures with simple folded configurations and high packing efficiency.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41416394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

A Cohesive-Zone-Based Contact Mechanics Analysis of Delamination in Homogeneous and Layered Half-Spaces Subjected to Normal and Shear Surface Tractions 基于黏结带的均匀和分层半空间中受法向和剪切表面牵引的分层接触力学分析

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-17 DOI: 10.1115/1.4062141

J. Cen, K. Komvopoulos

{"title":"A Cohesive-Zone-Based Contact Mechanics Analysis of Delamination in Homogeneous and Layered Half-Spaces Subjected to Normal and Shear Surface Tractions","authors":"J. Cen, K. Komvopoulos","doi":"10.1115/1.4062141","DOIUrl":"https://doi.org/10.1115/1.4062141","url":null,"abstract":"\u0000 A contact mechanics analysis of interfacial delamination in elastic and elastic-plastic homogeneous and layered half-spaces due to normal and shear surface tractions induced by indentation and sliding was performed using the finite element method. Surface separation at the delamination interface was controlled by a surface-based cohesive zone constitutive law. The instigation of interfacial delamination was determined by the critical separation distance of interface node pairs in mixed-mode loading based on a damage initiation criterion exemplified by a quadratic relation of the interfacial normal and shear tractions. Stiffness degradation was characterized by a linear relation of the interface cohesive strength and a scalar degradation parameter, which depended on the effective separation distances corresponding to the critical effective cohesive strength and the fully degraded stiffness, defined by a mixed-mode loading critical fracture energy criterion. Numerical solutions of the delamination profiles, the subsurface stress field, and the development of plasticity illuminated the effects of indentation depth and sliding distance on interfacial delamination in half-spaces with different elastic-plastic properties, interfacial cohesive strength, and layer thickness. Simulations yielded insight into the layer and substrate material property mismatch on interfacial delamination. A notable contribution of the present study is the establishment of a computational methodology for developing plasticity-induced cumulative damage models for multilayered structures.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41756371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Energy Dissipation on an elastic interface as a metric for evaluating three friction models 弹性界面上的能量耗散作为评价三种摩擦模型的度量

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-16 DOI: 10.1115/1.4062138

I. Lawal, M. Brake

{"title":"Energy Dissipation on an elastic interface as a metric for evaluating three friction models","authors":"I. Lawal, M. Brake","doi":"10.1115/1.4062138","DOIUrl":"https://doi.org/10.1115/1.4062138","url":null,"abstract":"\u0000 The effect of three different friction interface models on an elastic half-space is presented. Three constitutive friction models are studied: Coulomb, Soil-Concrete Interface and Bouc-Wen, using a computational mechanics framework that can represent the contact patch's material response to static and dynamic surface tractions. This response is observed as strains and stresses present from reciprocating sliding using an elasto-plastic friction(EPF) algorithm that also captures energy dissipation and hysteresis due to friction sliding. Additionally, the use of the 4-parameter Bouc-Wen model represents a new development in contact mechanics that allows microslip of the contact interface to be modeled. Hysteresis loops are generated for the three friction models based on a quasi-static assumption. This algorithm is built into a meso-scale FEM solver that is able to simulate different loading conditions and provide insight about how the friction models respond to load conditions and inform on experimental data. The energy dissipation from reciprocating friction sliding will be generated for each friction model as a metric that captures surface wear and potentially material damage.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47718190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Multilayer Shells Interacting Through Friction 多层壳通过摩擦相互作用

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-16 DOI: 10.1115/1.4062139

M. Alaydin, Y. Bazilevs

引用次数: 0

The Mechanics Difference Between The Outer Torus and Inner Torus 外环面与内环面的力学差异

IF 2.6 4区工程技术

Journal of Applied Mechanics-Transactions of the Asme Pub Date : 2023-03-14 DOI: 10.1115/1.4062136

B. Sun, Guangming Song

{"title":"The Mechanics Difference Between The Outer Torus and Inner Torus","authors":"B. Sun, Guangming Song","doi":"10.1115/1.4062136","DOIUrl":"https://doi.org/10.1115/1.4062136","url":null,"abstract":"\u0000 The formulation used by the most of studies on elastic torus are either Reissner mixed formulation or Novozhilov's complex-form one, however, for vibration and some displacement boundary related problem of torus, those formulations face a great challenge. It is highly demanded to have a displacement-type formulation for torus. In this paper, we will carry on author's previous work [B.H. Sun, Closed-form solution of axisymmetric slender elastic toroidal shells. J. of Engineering Mechanics, 136 (2010) 1281-1288.], and with the help of our own maple code, we are able to simulate some typical problems of torus. The numerical results are verified by both finite element analysis and H. Reissner's formulation. Our investigations show that both deformation and stress response of an elastic torus are sensitive to the radius ratio, and suggest that the analysis of a torus should be done by using the bending theory of a shell, and also reveal that the inner torus is stronger than outer torus due to the property of their Gaussian curvature. One of the most interesting discovery is that the crowns of a torus are the turning point of the Gaussion curvature at ϕ = 0, π, where the mechanics response of inner and outer torus is almost separated.","PeriodicalId":54880,"journal":{"name":"Journal of Applied Mechanics-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45959591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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