Mechanics of Cohesive-frictional Materials最新文献_第8页

An interal length scale in dynamic strain localization of multiphase porous media 多相多孔介质动态应变局部化的内部长度尺度

Mechanics of Cohesive-frictional Materials Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1484(199909)4:5<443::AID-CFM69>3.0.CO;2-6

H. W. Zhang, L. Sanavia, B. Schrefler

引用次数: 67

Determination of parameters of a hypoplastic constitutive model from properties of grain assemblies 从晶粒组合体特性确定欠塑性本构模型参数

Mechanics of Cohesive-frictional Materials Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1484(199909)4:5<461::AID-CFM71>3.0.CO;2-P

I. Herle, G. Gudehus

引用次数: 443

A new joint element for the analysis of media having discrete discontinuities 用于分析具有离散不连续介质的一种新的联合单元

Mechanics of Cohesive-frictional Materials Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1484(199909)4:5<487::AID-CFM76>3.0.CO;2-Z

J. Lee, G. Pande

引用次数: 11

Isotropic and anisotropic descriptions of damage in concrete structures 混凝土结构损伤的各向同性和各向异性描述

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-09 DOI: 10.1002/(SICI)1099-1484(199907)4:4<339::AID-CFM65>3.0.CO;2-J

Stéphanie Fichant, Christian La Borderie, Gilles Pijaudier-Cabot

{"title":"Isotropic and anisotropic descriptions of damage in concrete structures","authors":"Stéphanie Fichant, Christian La Borderie, Gilles Pijaudier-Cabot","doi":"10.1002/(SICI)1099-1484(199907)4:4<339::AID-CFM65>3.0.CO;2-J","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(199907)4:4<339::AID-CFM65>3.0.CO;2-J","url":null,"abstract":"Scalar damage models are very often implemented in computational analyses in order to predict the response and failure modes of concrete and reinforced concrete structures. In most situations, however, damage is not isotropic but has preferential directions. Therefore, there have been many questions about the pertinence and range of applicability of isotropic, scalar, damage models for describing a degradation process which is strongly geometrically oriented. In order to assess what are the limitations of such a simplifying assumption, a comparative study is presented. The constitutive relations used for this purpose derive from the same class of models with a gradual enhancement of the description of damage. The scalar damage model is compared to another model where damage-induced orthotropy is described, with the possibility of rotation of the principle axes of orthotropy. Both models incorporate crack closure effects and a plasticity damage coupling. Structural analyses on bending beams, compression-shear and tension-shear concrete panels are presented. Although it may appear to be simplistic, the scalar damage model provides accurate predictions when failure is mainly due to uniaxial extension. Crack closure introduces an additional anisotropy which is important in compression-shear problems. Finally, damage-induced anisotropy seems important when failure is due to multiaxial extensions, such as in shear-tension problems. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"4 4","pages":"339-359"},"PeriodicalIF":0.0,"publicationDate":"1999-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(SICI)1099-1484(199907)4:4<339::AID-CFM65>3.0.CO;2-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72311059","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: 140

Thermodynamically based mixture models of saturated and unsaturated soils 基于热力学的饱和和非饱和土壤混合模型

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-09 DOI: 10.1002/(SICI)1099-1484(199907)4:4<295::AID-CFM64>3.0.CO;2-9

K. Hutter, L. Laloui, L. Vulliet

{"title":"Thermodynamically based mixture models of saturated and unsaturated soils","authors":"K. Hutter, L. Laloui, L. Vulliet","doi":"10.1002/(SICI)1099-1484(199907)4:4<295::AID-CFM64>3.0.CO;2-9","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(199907)4:4<295::AID-CFM64>3.0.CO;2-9","url":null,"abstract":"Many geotechnical problems are conditioned by the coupling effects between the solid matrix and fluid transport, in particular in unsaturated zones: construction of embankments, cyclic loading of road foundations, environmental engineering, etc. An understanding of the behaviour of saturated/unsaturated soils is therefore important for the design and analysis of those geostructures. In this paper, the Svendsen–Hutter thermodynamic theory of a mixture of isotropic visco-elastic materials is summarized and applied to the formulation of field equations for saturated/unsaturated, compressible/incompressible soils. Emphasis is on the presentation of differences in the formulation, the roles of thermodynamics and configurational as well as saturation pressures. The theory is illustrated by studying (1) viscous mixtures (saturated binary/ternary mixtures and unsaturated binary mixtures) and (2) the statics of elastic soils. Several variants of this modern thermodynamic theory are presented. We establish a thermodynamic basis for well-known concepts of effective stress in saturated and unsaturated soils. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"4 4","pages":"295-338"},"PeriodicalIF":0.0,"publicationDate":"1999-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(SICI)1099-1484(199907)4:4<295::AID-CFM64>3.0.CO;2-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72311062","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: 122

Strain localization measurements in undrained plane-strain biaxial tests on Hostun RF sand Hostun RF砂不排水平面应变双轴试验中的应变局部化测量

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-09 DOI: 10.1002/(SICI)1099-1484(199907)4:4<419::AID-CFM70>3.0.CO;2-1

Moncef Mokni, Jacques Desrues

引用次数: 181

Validation of a plasticity bond model for steel reinforcement 钢筋塑性粘结模型的验证

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-09 DOI: 10.1002/(SICI)1099-1484(199907)4:4<361::AID-CFM66>3.0.CO;2-F

James V. Cox, Leonard R. Herrmann

{"title":"Validation of a plasticity bond model for steel reinforcement","authors":"James V. Cox, Leonard R. Herrmann","doi":"10.1002/(SICI)1099-1484(199907)4:4<361::AID-CFM66>3.0.CO;2-F","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(199907)4:4<361::AID-CFM66>3.0.CO;2-F","url":null,"abstract":"The validation of a plasticity model for bond between ribbed, steel bars and concrete is discussed. The model relates local slip and radial dilation to bond stress and radial confinement stress, i.e. it provides an interface characterization of the behaviour of a finite-thickness region around the bar—the bond zone. The validation study considers experimental results from six independent investigations. The specimens are all pull-out specimens but differ significantly in size and configuration. Models for each specimen, based on a single bond model calibration, reproduce the experimental results with acceptable accuracy. The response over the full range of slip and the mode of failure are examined. Some of the model's strengths, weaknesses, and potential improvements are discussed. For the most part, the models predicts the experimental bond strength within 20 per cent and exhibits the potential to predict both pull-out and splitting failures. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"4 4","pages":"361-389"},"PeriodicalIF":0.0,"publicationDate":"1999-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(SICI)1099-1484(199907)4:4<361::AID-CFM66>3.0.CO;2-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72311060","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: 30

A constitutive model for compaction of granular media, with account for deformation induced anisotropy 考虑变形各向异性的颗粒介质压实本构模型

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-09 DOI: 10.1002/(SICI)1099-1484(199907)4:4<391::AID-CFM68>3.0.CO;2-0

Jan Brandt, Larsgunnar Nilsson

{"title":"A constitutive model for compaction of granular media, with account for deformation induced anisotropy","authors":"Jan Brandt, Larsgunnar Nilsson","doi":"10.1002/(SICI)1099-1484(199907)4:4<391::AID-CFM68>3.0.CO;2-0","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(199907)4:4<391::AID-CFM68>3.0.CO;2-0","url":null,"abstract":"A constitutive model is proposed for the cold compaction of metal powders. It relies on classical concepts for elasto-plastic materials. For cemented carbides, which is the current application of the model, it is shown by experimental data that there develops significant anisotropy during a non-isostatic compaction. The model encompasses anisotropy through a kinematic hardening mechanism. For a certain state of hardening the back stress magnitude depends on the mean stress, such that there is a rotation (around the origin) of the yield surface. The need for a two-dimensional hardening parameter set, the relative density and a measure of the intensity of the anisotropy, is demonstrated. A compactness tensor P that holds the current relative density as det(P) and the directionality of the compaction history is conceived. The flow direction is derivable from a non-associated flow potential, but is more easily represented as the ratio of magnitude of deviatoric plastic increment to magnitude of volumetric plastic increment. The basic assumption of a flow potential is needed only to establish the form of the deviatoric flow component. Various functions of the model are mapped by series expansions from irregularly spaced experimental data in the sense of least-square fits. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"4 4","pages":"391-418"},"PeriodicalIF":0.0,"publicationDate":"1999-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(SICI)1099-1484(199907)4:4<391::AID-CFM68>3.0.CO;2-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72311061","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: 66

A constitutive model for compaction of granular media, with account for deformation induced anisotropy 考虑变形诱导各向异性的粒状介质压实本构模型

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1484(199907)4:4<391::AID-CFM68>3.0.CO;2-0

J. Brandt, L. Nilsson

引用次数: 65

Thermodynamically based mixture models of saturated and unsaturated soils 基于热力学的饱和和非饱和土混合模型

Mechanics of Cohesive-frictional Materials Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1484(199907)4:4<295::AID-CFM64>3.0.CO;2-9

K. Hutter, L. Laloui, L. Vulliet

引用次数: 121