Mechanics Research Communications最新文献

Deformable tubes with various cross sectional shapes: Geometric and rheological properties 具有各种截面形状的可变形管：几何和流变特性

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-27 DOI: 10.1016/j.mechrescom.2025.104435

Mustafa Turkyilmazoglu

引用次数: 0

Multiscale investigation of seismic precursors before major earthquakes 大地震前地震前兆的多尺度调查

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-23 DOI: 10.1016/j.mechrescom.2025.104449

Leandro Ferreira Friedrich , Mariana Hamdan Padilha , Giuseppe Lacidogna , Ignacio Iturrioz

引用次数: 0

Experimental investigation of the periodic core sandwich structure: Shape of the vibration modes 周期芯芯夹层结构的实验研究：振动模态的形状

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-13 DOI: 10.1016/j.mechrescom.2025.104434

Guillaume ROBIN , Thomas HUCHARD , Marc PONÇOT , El Mostafa DAYA

引用次数: 0

Comparative investigation of the contact coated rough surface coatings using the indentation and flattened methods 采用压痕法和压平法对接触涂覆粗糙表面涂层进行对比研究

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-10 DOI: 10.1016/j.mechrescom.2025.104422

Zhaoning Sun , Bangchun Wen

引用次数: 0

Adjoint state method in the block-parametric approach to the inverse problem analysis for elastic layered packages 弹性分层包体反问题分析的块参数法伴随状态法

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-07 DOI: 10.1016/j.mechrescom.2025.104426

Alexander V. Trofimov

{"title":"Adjoint state method in the block-parametric approach to the inverse problem analysis for elastic layered packages","authors":"Alexander V. Trofimov","doi":"10.1016/j.mechrescom.2025.104426","DOIUrl":"10.1016/j.mechrescom.2025.104426","url":null,"abstract":"<div><div>Issues of efficiently calculating the gradient of the residual function play an important role in the analysis of inverse problems of any nature. One of the methods for calculating the gradient, which allows considering the “state equation” as part of the forward mapping, is the Adjoint State Method. This method is applied to inverse problems for a layered elastic package located on an elastic foundation. The materials of the package layers are generally assumed to be anisotropic and non-uniform, as are the parameters of the elastic foundation. The model/observed data of the inverse problem are the ray displacements of some points on the upper surface of the package. Formulas for the gradient components are obtained in an infinite-dimensional version using a block-parametric approach to the analysis of inverse problems. The essence of the approach lies in the special block-parametric approximation of the prior probability density and likelihood function in a set of parameters and model data of the problem. The method allows one to estimate the parameters of the prior distribution of the diagnosed values, identify and exclude outliers of measured data from the created model, and construct the estimate of the posterior probability density of unknown parameters with an acceptable resolution. The issues related to the discretization of the initial infinite-dimensional problems, comparison of the results obtained based on the adjoint state method and difference schemes of different orders of approximation for calculating the gradient components, as well as the application of the Multigrid Iterative Method for solving the forward and adjoint problems are considered.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"147 ","pages":"Article 104426"},"PeriodicalIF":1.9,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071268","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

Analytic shapes of air-filled thin-walled membranes impacted upon a variable transmural pressure 充气薄壁膜的解析形状受可变跨壁压力的影响

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-05-05 DOI: 10.1016/j.mechrescom.2025.104421

Mustafa Turkyilmazoglu

引用次数: 0

FPGA-accelerated Binary Neural Networks as a surrogate model for a viscoplastic constitutive law in impulsively loaded beams fpga加速二元神经网络作为脉冲加载梁粘塑性本构律的替代模型

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-04-29 DOI: 10.1016/j.mechrescom.2025.104420

Vasileios Polydoras, Saurabh Balkrishna Tandale, Rutwik Gulakala, Marcus Stoffel

{"title":"FPGA-accelerated Binary Neural Networks as a surrogate model for a viscoplastic constitutive law in impulsively loaded beams","authors":"Vasileios Polydoras, Saurabh Balkrishna Tandale, Rutwik Gulakala, Marcus Stoffel","doi":"10.1016/j.mechrescom.2025.104420","DOIUrl":"10.1016/j.mechrescom.2025.104420","url":null,"abstract":"<div><div>In the present study, constitutive equations are replaced by a new type of energy-efficient neural networks that lead to significantly shorter computation times. We propose this method for impulsively loaded structures exhibiting strain-rate-dependent plasticity and replacing the material law with a so-called Binarized Neural Network (BNNs) in an in-house Finite Element algorithm. BNNs share the same architecture as the Feedforward Neural Networks (FFNNs) but utilize binary layers in place of dense layers. The motivation for employing BNNs lies in the possibility that the binary operations within the binary layers can be optimized for hardware implementation. Specifically, BNNs allow for effective programming of Field Programmable Gate Arrays (FPGAs), enabling the efficient execution of BNNs forward passes in terms of computation time and energy consumption, thus improving the performance of real-time dynamic simulations. Thus in the present study, a BNN is deployed to learn the non-linear viscoplastic material law and the PYNQ Z2 FPGA board has been programmed to process the forward pass of the BNN efficiently. The computation time of the BNN forward pass in the PYNQ Z2 FPGA is 60% faster than in 13th Gen. Intel i7-13700K CPU and 26% faster than in NVIDIA GeForce RTX 4090 GPU.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"146 ","pages":"Article 104420"},"PeriodicalIF":1.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906160","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

Hadamard compatibility condition implies existence of supersonic shock waves in bi-modular materials Hadamard相容条件意味着双模材料中存在超声速激波

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-04-26 DOI: 10.1016/j.mechrescom.2025.104425

Sergey V. Kuznetsov

引用次数: 0

A modified critical plane energy–energy gradient based multiaxial fatigue life prediction model for smooth/notched specimens 基于修正临界平面能量-能量梯度的光滑/缺口试件多轴疲劳寿命预测模型

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-04-25 DOI: 10.1016/j.mechrescom.2025.104418

YiHeng Wei , Xu Zhang , Wei Ye , XuDong Li , ShiChao Zhang , He Mao , JianYao Yao

{"title":"A modified critical plane energy–energy gradient based multiaxial fatigue life prediction model for smooth/notched specimens","authors":"YiHeng Wei , Xu Zhang , Wei Ye , XuDong Li , ShiChao Zhang , He Mao , JianYao Yao","doi":"10.1016/j.mechrescom.2025.104418","DOIUrl":"10.1016/j.mechrescom.2025.104418","url":null,"abstract":"<div><div>The energy-based critical plane method has gained considerable acceptance in multiaxial fatigue life prediction, but conventional implementations fundamentally limit accuracy through oversimplified strain energy density computations. By combining the modified strain energy computation approach and critical plane criterion, a general prediction model that applicable to both smooth and notched specimens is established, in which the critical plane is determined by the maximum damage parameter. In the proposed model, the concept of energy gradient influence coefficient in terms of the energy distribution on the critical plane is defined to account for the influence of the notch. For model verification and comparison, finite element analysis (FEA) and the experimental data of GH4169, TC4 and Al7050-T7451 alloys are utilized. Quantitative evaluation shows that the proposed model has superior prediction accuracy compared to conventional energy-based models (SWT, CXH and CCB), especially when the materials generate plastic strain energy.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"146 ","pages":"Article 104418"},"PeriodicalIF":1.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878922","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

VIV of 2DOF square and 1DOF circular structures in tandem 二自由度方形和一自由度圆形结构串联的涡激振动

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-04-24 DOI: 10.1016/j.mechrescom.2025.104423

Henry Francis Annapeh, Victoria Kurushina

{"title":"VIV of 2DOF square and 1DOF circular structures in tandem","authors":"Henry Francis Annapeh, Victoria Kurushina","doi":"10.1016/j.mechrescom.2025.104423","DOIUrl":"10.1016/j.mechrescom.2025.104423","url":null,"abstract":"<div><div>This study investigates the vortex-induced vibration (VIV) of a tandem configuration consisting of a two-degree-of-freedom (2DOF) upstream square cylinder and a one-degree-of-freedom (1DOF) downstream circular cylinder. Numerical simulations are conducted using the Detached Eddy Simulation-Shear Stress Transport (DES-SST) model at Reynolds numbers ranging from 1000 to 6500 and reduced velocities between 2 and 11, with spacing ratios (<em>L/D</em>) of 3, 6, and 9. The study examines the effects of spacing ratios on hydrodynamic coefficients, oscillation amplitudes, frequency ratios, vortex shedding behavior, and the lock-in phenomenon. Results reveal that the spacing ratio significantly influences VIV dynamics, with smaller <em>L/D</em> ratios producing narrower lock-in regions and enhanced shielding effects, which lead to reduced vibration amplitudes and drag coefficients for the downstream cylinder. The maximum displacement amplitude observed in this study reaches 1D at <em>L/D</em> = 6 for the downstream structure. The upstream square cylinder exhibits relatively small oscillations, with a decrease in transverse amplitude as the spacing ratio increases. These findings provide critical insights into the dynamics of tandem structures, contributing to the improved design and operation of offshore systems subjected to VIV.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"146 ","pages":"Article 104423"},"PeriodicalIF":1.9,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890505","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