JSME international journal. Series A, mechanics and material engineering最新文献_第3页

Photoviscoelastic Stress and Strain Analysis around a Surface Groove under Rolling Contact Load 滚动接触载荷下表面沟槽周围的光粘弹性应力和应变分析

JSME international journal. Series A, mechanics and material engineering Pub Date : 1997-01-15 DOI: 10.1299/JSMEA1993.40.1_44

S. Yoneyama, Daisuke Ayame, J. Gotoh, M. Takashi

{"title":"Photoviscoelastic Stress and Strain Analysis around a Surface Groove under Rolling Contact Load","authors":"S. Yoneyama, Daisuke Ayame, J. Gotoh, M. Takashi","doi":"10.1299/JSMEA1993.40.1_44","DOIUrl":"https://doi.org/10.1299/JSMEA1993.40.1_44","url":null,"abstract":"The authors discuss the first step in the approach to the fundamental mechanism of small-scale local fracture near the contact surface between a rigid traveling roller and a viscoelastic plate which has a deep groove on the upper edge of the plate, which simulates pitting or surface cracking around the contact surface. The photoviscoelastic method is applied to investigate the time-dependent stress and strain state under the condition of nonproportional loading, taking a typical case of the interaction of stress fields due to a traveling contact load and a surface groove into account. Complicated variations of the time-dependent photoviscoelastic fringe pattern are observed near the tip of the surface groove. The time variations of not only the principal stress difference and principal strain difference, but also principal directions of stress, strain and birefringence are evaluated using a convenient computer-aided photoviscoelastic technique under the temperature at which the material shows marked viscoelastic behavior. Time variations of stress intensity factors, K I and K II , are also evaluated using the least-squares method following the technique proposed by Sanford and Dally.","PeriodicalId":143127,"journal":{"name":"JSME international journal. Series A, mechanics and material engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134376268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

The Estimation of Fracture Resistance of Orthogonal Three-Dimensional Fiber-Reinforced Composite by DCB Testing 正交三维纤维增强复合材料抗断裂性能的DCB试验评估

JSME international journal. Series A, mechanics and material engineering Pub Date : 1997-01-15 DOI: 10.1299/JSMEA1993.40.1_37

M. Ji, H. Ishikawa, M. Anahara, Y. Yasui

引用次数: 0

Molecular Dynamics Study of Impurity Effects on Grain Boundary Grooving 杂质对晶界开槽影响的分子动力学研究

JSME international journal. Series A, mechanics and material engineering Pub Date : 1997-01-15 DOI: 10.1299/JSMEA1993.40.1_15

T. Iwasaki, N. Sasaki, A. Yasukawa, N. Chiba

引用次数: 4

Applicability of Fracture Mechanics in Strength Evaluation of Functionally Graded Materials 断裂力学在功能梯度材料强度评价中的适用性

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_479

K. Tohgo, M. Sakaguchi, H. Ishii

{"title":"Applicability of Fracture Mechanics in Strength Evaluation of Functionally Graded Materials","authors":"K. Tohgo, M. Sakaguchi, H. Ishii","doi":"10.1299/JSMEA1993.39.4_479","DOIUrl":"https://doi.org/10.1299/JSMEA1993.39.4_479","url":null,"abstract":"Elastic and elastic-plastic analyses of a crack in a particulate-dispersed functionally graded material (FGM) have been carried out using a newly developed finite element method based on Tohgo-Chou-Weng's(1994, 1996) constitutive relation for particulate-reinforced composites. By setting the mechanical properties of particles and a matrix and their content graded in the thickness direction, FGMs and non-FGM are designed. From comparison of the numerical results for the FGMs and non-FGM, the influence of the gradient of the mechanical properties on a stress intensity factor and the crack tip field is discussed. The following conclusions are derived: (1) The stress intensity factor of a crack under constant boundary conditions is considerably affected by the gradient of the mechanical properties. (2) The elastic and plastic stress singular fields around a crack tip in a FGM are basically described by the fracture mechanics parameters(K 1 and J 1 ) as well as in a non-FGM, using the mechanical properties of the material at the crack tip. (3) The size of the singular field decreases with an increase in the gradient of the mechanical properties. This means that the applicability of fracture mechanics, such as the small-scale-yielding condition and the validity of the J-integral, is affected by the gradient.","PeriodicalId":143127,"journal":{"name":"JSME international journal. Series A, mechanics and material engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120914125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Analysis of Asymmetrical Sheet Rolling by Stream Function Method 流函数法分析薄板不对称轧制过程

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_598

Y. Hwang, T. Chen

引用次数: 11

Simulation of Microfracture Process and Fracture Strength in 2-Dimensional Polycrystalline Materials 二维多晶材料微断裂过程及断裂强度模拟

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_548

Byung‐Nam Kim, Hidehumi Naitoh, S. Wakayama, M. Kawahara

{"title":"Simulation of Microfracture Process and Fracture Strength in 2-Dimensional Polycrystalline Materials","authors":"Byung‐Nam Kim, Hidehumi Naitoh, S. Wakayama, M. Kawahara","doi":"10.1299/JSMEA1993.39.4_548","DOIUrl":"https://doi.org/10.1299/JSMEA1993.39.4_548","url":null,"abstract":"Microfracture processes of microcracking and crack propagation are simulated along with fracture strengths for 2-dimensional alumina polycrystals which have thermal anisotropy within a grain. Microcracks are generated by thermally induced residual stresses at a grain boundary. The stress concentration near the microcrack is calculated numerically by the body force method, and superposed on the pre-existing residual stress. Stress intensity factors at the microcrack tip are also obtained by the method, and the location at which the next microfracture occurs is determined by the competition between microcracking and crack propagation in the new stress state. The microfracture stress increases with the progress of the fracture and decreases after maximum indicating a fracture strength. In many cases, the propagation of microcracks induces an unstable fracture. With decreasing grain size and increasing grain boundary toughness, the number of microfractures prior to the unstable state decreases, while the fracture strengths increase. For alumina of grain size 17.5 μm, when the fracture toughness of the grain boundary is 0.6 times that of the grain or greater, unstable fracture occurs prior to stable microcracking.","PeriodicalId":143127,"journal":{"name":"JSME international journal. Series A, mechanics and material engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Characteristics of static and fatigue strength of alumina ceramic joints 氧化铝陶瓷接头的静强度和疲劳强度特性

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_613

F. Tamai, K. Hirano

引用次数: 3

A Continuum Interface Debonding Model and Application to Matrix Cracking of Composites 连续界面脱粘模型及其在复合材料基体开裂中的应用

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_496

F. Ma, K. Kishimoto

引用次数: 13

Simulation of AE Generation Behavior in 2-Dimensional Polycrystals by Using the Body Force Method 用体力法模拟二维多晶体声发射行为

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_633

Byung‐Nam Kim, Hidehumi Naitoh, S. Wakayama

{"title":"Simulation of AE Generation Behavior in 2-Dimensional Polycrystals by Using the Body Force Method","authors":"Byung‐Nam Kim, Hidehumi Naitoh, S. Wakayama","doi":"10.1299/JSMEA1993.39.4_633","DOIUrl":"https://doi.org/10.1299/JSMEA1993.39.4_633","url":null,"abstract":"AE (Acoustic Emission) generation behavior during microfracture process of 2-dimensional alumina polycrystals is simulated along with its characteristic parameters, by assuming that a microfracture corresponds to an AE event. The microfracture process is simulated by using the body force method. Various AE generation behaviors are predicted as a function of the grain boundary toughness (Kcb), the grain size and the distribution state of residual stresses due to crystalline anisotropy. The predicted AE events have a tendency to occur at higher stress with increasing K cb and with decreasing grain size. By the fracture-mechanical calculation of the crack opening volume, the relative variation of AE amplitude is also simulated. The actual AE measurements are carried out in vacuum for two kinds of alumina with different grain size, and compared with the simulated results. The cumulative AE event curve for 11.5 μm grain size shows good agreement with the simulation when the K cb is 0.35 times the grain toughness (K cg ), and that for 28.2μm shows good agreement with the simulation at K cb =0.45K cg . The results of AE location for both the simulation and the measurement show the similar characteristics of the scattered distribution over the stressed fields.","PeriodicalId":143127,"journal":{"name":"JSME international journal. Series A, mechanics and material engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133200309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Fracture Mechanics Study of Ring Crack Initiation in Ceramics by Sphere Indentation 陶瓷球形压痕引发环形裂纹的断裂力学研究

JSME international journal. Series A, mechanics and material engineering Pub Date : 1996-10-15 DOI: 10.1299/JSMEA1993.39.4_489

Kohji Ohgushi, M. Ichikawa

引用次数: 7