...-deflection behavior involves both bending and torsional elastoplastic deformations of the pipe, phenomena which have not been previously studied in the context of the dynamic problem of pipe whip. Initially, neglecting ovalization and local collapse (kinking), the bent pipe is modeled as a beam, using...

... at cell level while maintaining the history of plastic deformation at ligament level. First, the phenomenological elastoplastic constitutive behavior of the ligaments composing the unit cell is modeled. Then, using the constitutive ligament model, the effective unit cell response is obtained from...

...-plastic regime, such as stick-slip problems, and also for metals and alloys with low or moderate yield stress. 13 01 2009 02 06 2009 14 12 2009 14 12 2009 alloys elasticity elastoplasticity finite element analysis friction high-temperature effects integral equations...

...Yanchen Du; Shulin Wang Elastoplastic deformation occurs widely in engineering impact. Although many empirical solutions of elastoplastic impact between two spheres have been obtained, the analytical solution, verified by means of other methods, to the impact model has not been put forward...

...Jehuda Tirosh; Sharon Peles The intention of this study is to predict the fatigue-safe long life behavior of elastoplastic porous materials subjected to zero-tension fluctuating load. It is assumed that the materials contain a dilute amount of voids (less than 5%) and obey Gurson’s model of plastic...

... models: a mesh overlay technique, whose basic idea is to create a different FE model for each material definition (fractional derivative viscoelastic and elastoplastic), all with identical meshes but with different material definition, and sharing the same nodes. Fractional-derivative viscoelasticity...

... for nanoindenter calibration have been used to verify the theoretical results. 22 01 2008 30 06 2008 22 08 2008 calibration elastoplasticity finite element analysis friction indentation mechanical testing micromechanics plastic deformation The advent of instrumented...

... interaction. An ensemble-volume averaging technique is conducted to obtain the overall elastoplastic constitutive behavior for amorphous nanocomposites with randomly distributed spherical nanoparticles. Explicit expressions of the effective elastic stiffness and yield function in terms of the constituent...

... investigated. 16 04 2007 11 06 2007 27 02 2008 elastoplasticity fast Fourier transforms mechanical contact plastic deformation rolling friction shear modulus sliding friction stress-strain relations vibrations The wear experiment reported in ( 1 ) of a copper pin sliding...

... and the sleeve, assuming the sleeve is elastic and the specimen is elastoplastic with a Drucker–Prager plasticity model. The first part of the paper briefly explains the experimental technique and how the stress-strain curves obtained during the test are interpreted. A simple and straightforward approach...

... wavy surface and an engineering rough surface in order to examine its capability of evaluating the elasto-plastic contact behaviors of nominally flat surfaces. 04 12 2006 14 05 2007 15 02 2008 elastoplasticity fast Fourier transforms mechanical contact numerical analysis...

...Izhak Etsion 06 01 2007 20 03 2007 sliding friction elastoplasticity slip adhesion shear strength The authors presented a model for sliding inception that is essentially based on the 1949 Mindlin approach (see Ref. 1 ) for frictional contact with extension to elastic...

... elastoplasticity cracks integral equations For a homogeneous elastic material, Rice ( 1 ) introduced the path-independent J contour integral and derived it as the (potential) energy release rate G defined by 1 G = − d Π d a where Π is the potential energy...

... in the coordinates of Mohr. The results in this work demonstrate the capability of thermodynamically consistent gradient-dependent elastoplastic model formulations to suppress the localized failure modes of the classical plasticity that take place when the hardening/softening modulus H ¯ equals the critical value...

...Ricardo Schiava; Guillermo Etse In this work an elastoplastic constitutive theory for unsaturated soils is presented. The proposed material model is formulated in the general framework of the theory of porous media and of the flow theory of plasticity. The model is based on an extension of the well...

... are orthotropic and elastoplastic. Basic assumptions of the proposed model and the resulting equations are first presented in the paper. The numerical algorithm developed for the implementation in a three-dimensional (3D) finite element nonlinear program is also described. The paper is completed with application...

... Model Considering Elastic, Elastoplastic, and Plastic Deformation ,” ASME J. Tribol. 0742-4787 10.1115/1.1537744 , 125 , pp. 232 – 240 . Johnson , K. L. , 1968 , “ Deformation of a Plastic Wedge by a Rigid Flat Die Under the Action of a Tangential Force ,” J. Mech. Phys. Solids 0022...

... deformation elastoplasticity The contact between two rough surfaces has a strong influence on the phenomena of friction, wear, and lubrication, as well as on the conduction of heat and electricity. In general, the structure of most surfaces appears to be random on a small scale. Statistical...

.... Danielsson and Grenestedt 1 manufactured and tested various graded combinations of Divinycell PVC based foams, and showed that a number of benefits could be obtained. aluminium polymer foams bifurcation yield stress elastoplasticity impact strength elastic constants 23 February 2004...

... spherical caps’ static stability around λ = 4.0 . The base diameter of tested caps is about 176 mm, i.e., much larger than reported in Ref. 4 . carbon steel buckling elasticity elastoplasticity 14 09 2004 18 02 2005 2005 American Society of Mechanical Engineers ...