Strain最新文献_第5页

Issue Information 问题信息

IF 2.1 3区材料科学

Strain Pub Date : 2022-04-12 DOI: 10.1002/wcs.1326

F. Mentré, Sharon J. Swan, Elise S. Laffman-Johnson

引用次数: 0

Effect of microstructural variation on strain localization in double‐sided friction stir welded AA6061‐AA7075 joints 双面搅拌摩擦焊AA6061 - AA7075接头显微组织变化对应变局部化的影响

IF 2.1 3区材料科学

Strain Pub Date : 2022-04-08 DOI: 10.1111/str.12413

A. Garg, A. Bhattacharya

{"title":"Effect of microstructural variation on strain localization in double‐sided friction stir welded AA6061‐AA7075 joints","authors":"A. Garg, A. Bhattacharya","doi":"10.1111/str.12413","DOIUrl":"https://doi.org/10.1111/str.12413","url":null,"abstract":"In friction stir welding (FSW), the inhomogeneous microstructure significantly affects the mechanical performance of the joints. The present study investigates the influence of microstructural asymmetry along the thickness on strain localization during tensile test using the digital image correlation technique and fracture morphology for double‐sided FSW (DS‐FSW) AA6061‐AA7075 joints. In top and bottom slices of the transverse tensile sample, nonhomogenous strain localization is noted in heat affected zone (HAZ) of the advancing side (AS), that is, AA6061‐T6, and also presents higher tensile strength. However, in the middle slice of the transverse sample, larger region including thermo‐mechanically affected zone and HAZ undergoes strain localization and exhibits higher elongation at failure. In longitudinal specimens, the strain distribution is homogeneous up to uniform elongation followed by strain concentration at a localised region and fracture. Electron backscatter diffraction revealed that the extent of dynamic recrystallization on the retreating side (AA7075‐T61) is higher than that observed on the AS of the weld. The grain orientation spread map showed a high fraction of recrystallized grains at the weld centre. Presence of major shear textures components B/B¯ and C both below the tool shoulder and weld centre regions are observed from pole figures. The recrystallized texture components P ({011}<112>), Goss ({110}<001>), Rotated Goss ({110}<110>), Cube ({001}<100>) and shear texture ({001}<110>) components is also noted at the weld centre. Middle slice both for longitudinal and transverse sample showed the finest dimple size on the fracture surfaces. The strain localization behaviour and tensile performance assessed for transverse and longitudinal samples can be helpful to find the load orientation dependency and safe design of DS‐FSW joints.","PeriodicalId":51176,"journal":{"name":"Strain","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48182313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Calibrating constitutive models with full‐field data via physics informed neural networks 通过物理信息神经网络用全场数据校准本构模型

IF 2.1 3区材料科学

Strain Pub Date : 2022-03-30 DOI: 10.1111/str.12431

Craig M. Hamel, K. Long, S. Kramer

{"title":"Calibrating constitutive models with full‐field data via physics informed neural networks","authors":"Craig M. Hamel, K. Long, S. Kramer","doi":"10.1111/str.12431","DOIUrl":"https://doi.org/10.1111/str.12431","url":null,"abstract":"The calibration of solid constitutive models with full‐field experimental data is a long‐standing challenge, especially in materials that undergo large deformations. In this paper, we propose a physics‐informed deep‐learning framework for the discovery of hyperelastic constitutive model parameterizations given full‐field surface displacement data and global force‐displacement data. Contrary to the majority of recent literature in this field, we work with the weak form of the governing equations rather than the strong form to impose physical constraints upon the neural network predictions. The approach presented in this paper is computationally efficient, suitable for irregular geometric domains, and readily ingests displacement data without the need for interpolation onto a computational grid. A selection of canonical hyperelastic material models suitable for different material classes is considered including the Neo–Hookean, Gent, and Blatz–Ko constitutive models as exemplars for general non‐linear elastic behaviour, elastomer behaviour with finite strain lock‐up, and compressible foam behaviour, respectively. We demonstrate that physics informed machine learning is an enabling technology and may shift the paradigm of how full‐field experimental data are utilized to calibrate constitutive models under finite deformations.","PeriodicalId":51176,"journal":{"name":"Strain","volume":"59 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42230046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Issue Information 问题信息

IF 2.1 3区材料科学

Strain Pub Date : 2022-03-14 DOI: 10.1111/str.12391

引用次数: 0

Microtubule Organization Is Essential for Maintaining Cellular Morphology and Function. 微管组织对维持细胞形态和功能至关重要

3区材料科学

Strain Pub Date : 2022-03-07 eCollection Date: 2022-01-01 DOI: 10.1155/2022/1623181

Lijiang Huang, Yan Peng, Xuetao Tao, Xiaoxiao Ding, Rui Li, Yongsheng Jiang, Wei Zuo

{"title":"Microtubule Organization Is Essential for Maintaining Cellular Morphology and Function.","authors":"Lijiang Huang, Yan Peng, Xuetao Tao, Xiaoxiao Ding, Rui Li, Yongsheng Jiang, Wei Zuo","doi":"10.1155/2022/1623181","DOIUrl":"10.1155/2022/1623181","url":null,"abstract":"<p><p>Microtubules (MTs) are highly dynamic polymers essential for a wide range of cellular physiologies, such as acting as directional railways for intracellular transport and position, guiding chromosome segregation during cell division, and controlling cell polarity and morphogenesis. Evidence has established that maintaining microtubule (MT) stability in neurons is vital for fundamental cellular and developmental processes, such as neurodevelopment, degeneration, and regeneration. To fulfill these diverse functions, the nervous system employs an arsenal of microtubule-associated proteins (MAPs) to control MT organization and function. Subsequent studies have identified that the disruption of MT function in neurons is one of the most prevalent and important pathological features of traumatic nerve damage and neurodegenerative diseases and that this disruption manifests as a reduction in MT polymerization and concomitant deregulation of the MT cytoskeleton, as well as downregulation of microtubule-associated protein (MAP) expression. A variety of MT-targeting agents that reverse this pathological condition, which is regarded as a therapeutic opportunity to intervene the onset and development of these nervous system abnormalities, is currently under development. Here, we provide an overview of the MT-intrinsic organization process and how MAPs interact with the MT cytoskeleton to promote MT polymerization, stabilization, and bundling. We also highlight recent advances in MT-targeting therapeutic agents applied to various neurological disorders. Together, these findings increase our current understanding of the function and regulation of MT organization in nerve growth and regeneration.</p>","PeriodicalId":51176,"journal":{"name":"Strain","volume":"22 1","pages":"1623181"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8920689/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85426175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non‐parametric stress field estimation for history‐dependent materials: Application to ductile material exhibiting Piobert–Lüders localization bands 历史相关材料的非参数应力场估计：应用于显示Piobert–Lüders局部化带的韧性材料

IF 2.1 3区材料科学

Strain Pub Date : 2022-02-27 DOI: 10.1111/str.12410

Raphaël Langlois, M. Coret, J. Réthoré

引用次数: 4

The quasi‐static crush response of electron‐beam‐melt Ti6Al4V body‐centred‐cubic lattices: The effect of the number of cells, strut diameter and face sheet 电子束熔融Ti6Al4V体心立方晶格的准静态挤压响应:细胞数、支撑直径和面片的影响

IF 2.1 3区材料科学

Strain Pub Date : 2022-02-22 DOI: 10.1111/str.12411

M. Güden, Alican Tuncay Alpkaya, Burcu Arslan Hamat, Burak Hızlı, A. Taşdemirci, A. Tanrıkulu, H. Yavaş

{"title":"The quasi‐static crush response of electron‐beam‐melt Ti6Al4V body‐centred‐cubic lattices: The effect of the number of cells, strut diameter and face sheet","authors":"M. Güden, Alican Tuncay Alpkaya, Burcu Arslan Hamat, Burak Hızlı, A. Taşdemirci, A. Tanrıkulu, H. Yavaş","doi":"10.1111/str.12411","DOIUrl":"https://doi.org/10.1111/str.12411","url":null,"abstract":"The effect of the number of cells, strut diameter and face sheet on the compression of electron‐beam‐melt (EBM) Ti6Al4V (Ti64) body‐centred‐cubic (BCC) lattices was investigated experimentally and numerically. The lattices with the same relative density (~0.182) were fabricated with and without 2‐mm‐thick face sheets in 10 and 5 mm cell size, 8–125 unit cell (two to five cells/edge) and 2 and 1 mm strut diameter. The experimental compression tests were further numerically simulated in the LS‐DYNA. Experimentally two bending‐dominated crushing modes, namely, lateral and diagonal layer crushing, were determined. The numerical models however exhibited merely a bending‐dominated lateral layer crushing mode when the erosion strain was 0.4 and without face‐sheet models showed a diagonal layer crushing mode when the erosion strain was 0.3. Lower erosion strains promoted a diagonal layer crushing mode by introducing geometrical inhomogeneity to the lattice, leading to strain localisation as similar to the face sheets which introduced extensive strut bending in the layers adjacent to the face sheets. The face‐sheet model showed a higher but decreasing collapse strength at an increasing number of cells, just as opposite to the without face‐sheet model, and the collapse strength of both models converged when the number of cells was higher than five‐cell/edge. The decrease/increase of the collapse strengths of lattices before the critical number of cells was claimed mainly due to the size‐imposed lattice boundary condition, rather than the specimen volume. The difference in the experimental collapse strengths between the 5‐ and the 10‐mm cell‐size lattices was ascribed to the variations in the microstructures—hence the material model parameters between the small‐diameter and the large‐diameter EBM‐Ti64 strut lattices.","PeriodicalId":51176,"journal":{"name":"Strain","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48059492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

3D optical flow for large CT data of materials microstructures 材料微观结构大CT数据的三维光流

IF 2.1 3区材料科学

Strain Pub Date : 2022-02-22 DOI: 10.1111/str.12412

Tessa Nogatz, C. Redenbach, K. Schladitz

引用次数: 3

A novel experimental method to characterise the shear strength of concrete based on pre‐stressed samples 一种基于预应力试件表征混凝土抗剪强度的新实验方法

IF 2.1 3区材料科学

Strain Pub Date : 2022-01-30 DOI: 10.1111/str.12407

P. Forquin, R. Abdul‐Rahman, D. Saletti

引用次数: 1

A new localized inverse identification method for high temperature testing under resistive heating: Application to the elastic‐viscoplastic behaviour of L‐PBF processed In718 一种新的电阻加热高温测试局部逆识别方法：应用于L‐PBF处理In718的弹粘塑性行为

IF 2.1 3区材料科学

Strain Pub Date : 2022-01-19 DOI: 10.1111/str.12409

Feng Gao, B. Macquaire, Yancheng Zhang, M. Bellet

{"title":"A new localized inverse identification method for high temperature testing under resistive heating: Application to the elastic‐viscoplastic behaviour of L‐PBF processed In718","authors":"Feng Gao, B. Macquaire, Yancheng Zhang, M. Bellet","doi":"10.1111/str.12409","DOIUrl":"https://doi.org/10.1111/str.12409","url":null,"abstract":"The mechanical behaviour of the nickel‐based superalloy In718, as processed from laser powder bed fusion (L‐PBF) additive manufacturing, is characterized at high temperature, from 800 to 1100°C. Samples built by L‐PBF are submitted to sequences combining uniaxial tensile load at different prescribed velocities, and relaxation steps of different durations, operated under resistive heating under vacuum, with a home‐developed testing machine. Tests are equipped with force evolution measurement, with infra‐red field imaging and thermocouples to capture the non‐uniform temperature distributions induced by resistive heating, and with digital image correlation to capture the non‐linear displacement fields. An inverse finite element strategy is developed to identify the parameters of a temperature‐dependent elastic‐viscoplastic behaviour model. The strategy is based on (i) direct finite element simulations of tests, (ii) a cost function expressing the distance between calculated and measured quantities, and (iii) a minimization algorithm. Direct numerical simulations are performed on a limited part of the working zone of samples, the zone of interest, with applied boundary conditions provided by DIC records and with an imposed temperature distribution provided by infra‐red imaging. The cost function is based on the force evolution only, for a series of different tests operated at different nominal temperatures. Optimum values of constitutive parameters are obtained by minimizing the cost function value, which is achieved with the home‐developed optimization platform MOOPI. Finally, the identified parameters are discussed with respect to the literature.","PeriodicalId":51176,"journal":{"name":"Strain","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44161937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3