... geology japan government plate tectonics geologist transformation steel mining constitutive equation hydraulic fracturing plastic strain tensile test stainless steel module plastic deformation metals & mining deformation tank fraction earthquake material constitutive equation...

... round bar specimen specimen plastic strain power law simulation cross section uniform true stress constitutive equation engineering stress strain curve exponent true stress flow stress equation new formula upstream oil & gas tensile test hollomon metals & mining...

... cyclic loading plastic strain loading external surface mechanics displacement triaxiality evolution damage variable similarity center surface model ductile damage constitutive equation cumulative plastic strain upstream oil & gas boundary condition lemaitre accumulation extension...

... loading condition. mechanics stress-strain curve application complex loading suzuki plasticity hashiguchi finite element analysis constitutive equation nonlinearly surface model cyclic loading mech plastic strain accumulation ueno loading residual stress Welding Residual Stress...

... significant difference. It is not appropriate to apply the decoupling scheme that uses a constitutive equation which cannot simulate cyclic hardening or softening to the microscopic slip deformation analyses in fatigue crack problems. slip deformation stress-strain relation deformation shear strain...

... For the analysis of embankments on soft clays, a constitutive equation was proposed, which is based on an anisotropic hardening rule and the total stress concept. The constitutive model was implemented in ABAQUS code, such that large deformation analysis can be performed accurately...

... The extended elastoplastic constitutive equation is formulated by introducing both the elastic boundary and the damage concepts for cyclic plasticity phenomena under the macroscopically elastic stress condition. These concepts are introduced to describe a pure elastic responses and a progressive...

... of this study is the development of an expert system applicable for the assessment of structural integrity throughout crack initiation and structural failure based on the Local Approach to Fracture. The generalized elasto-visco-plastic constitutive equation, which can consider the internal damage evolution...

...-liquid-solid three-phase flow in the vertical pipe have been studied by several workers. air lift system production monitoring pipe virtual mass force reservoir surveillance constitutive equation solid-liquid-air three-fluid transient flow production control boundary condition...

... in the development of constitutive equations and the failure criteria of ice under a complex stress-strain state can be found in Fish and Zaretsky (1997). In the second approach, developed by the authors (Fish, 1991a through 1994; Zaretsky and Fish, 1996a, b; Fish and Zaretsky, 1997), creep and failure of ice...

... of motion and elastic constitutive equation in clastic problem or incremental elasto-plastic constitutive equations in elasto-plastic problem. To solve these problems we use the bicharacteristic method and Zwas" method based on the finite difference method. Additionally, In order to deal with the dynamic...

... loading are investigated. In addition, texturing is emphasized and some significant governing factors are proposed. INTRODUCTION Since Kratochvil (1971) recognized a need for the constitutive equation of plastic spin, many researches have been studied on this subject. Summarizing them from...

...-plastic analysis of a thick-walled pipe, an elastic-viscoplastic model is used and a general elastic-viscoplastic constitutive equation is formulated. The influence of the plastic compressibili~ and temperature is investigated for a thick-walled pipe, using the finite element met-hod. KEY WORDS: Thick...

... ABSTRACT: A combined creep and yield model has been developed for the entire (primary, secondary and tertiary) creep and the long-term strength of frozen soil under multiaxial stress at both constant stresses and constant strain rates by a single (unified) constitutive equation. Secondary...

... the development of a constitutive equation for sea ice which reproduces its broad mechanical features particularly demanding. A new constitutive equation is presented, based on the reo lation for the transient viscous flow of sea ice (Sunder and Wu, 1989a, b) but with the addition of thermodynamics and damage...

... the modified Miner rule or" the Haibach method [21. In general, fatigue limit is unobtainable with other methods. However", it is not certain that the value of the fatigue limit derived by the above methods is always correct. exponential distribution deformation constitutive equation transition...

... including the damage effect. Key words: continuum damage mechanics, large deformation, elasto- plastic damage constitutive equation, finite element analysis INTRODUCTION Nonlinear behavior of a structure can be separated into material and geometric nonlinear effects. Geometric nonlinearities has been set...

..., and the nonlinear coupling between the ice and the interacting structures. offshore karr equation constitutive equation plane strain confinement interaction ice bar differential equation ice medium proc damage model deformation artificial intelligence ice-structure interaction...

... ABSTRACT: Studies were carried out on deformation and failure of ice under monotonic loading (0 = crt). A constitutive equation, a strength criterion and a failure strain criterion were developed for ice under constant stress rate (a = const.). The constitutive equation was developed...

... ABSTRACT: Transient behavior of viscoelastic membranes subject to cyclic loads, is studied; this may occur for membrane structures in the ocean environment. Analysis is by finite element method and the direct solution of the finite linear hereditary integrodifferential constitutive equation...