The buckling of rate dependent structures is not a topic often discussed in the literature. Methods to predict such exist, but only few experimental works have been published, and even less when considering thick shell structures. In this work we are interested elasto-visco-plastic hemi-egg shells. We follow modelling/experimental approach analyse problem. Buckling experiments at room temperatu...

Abstract In this survey paper, we present a multiscale post-processing method in exploration. Based on physically relevant mollifier technique involving the elasto-oscillatory Cauchy–Navier equation, mathematically describe extractable information within 3D geological models obtained by migration as is commonly used for geophysical exploration purposes. More explicitly, developed approach extra...

A three-dimensional (3D) representative volume element (RVE) model was developed for analyzing effective mechanical behavior of fiber-reinforced ceramic matrix composites with imperfect interfaces. In the model, the fiber is assumed to be perfectly elastic until its tensile strength, and the ceramic material is modeled by an elasto-plastic Drucker-Prager constitutive law. The RVE model is then ...

We present a 3D adhesion model based on the JKR theory applied locally for all contacting asperity couple and the calculations account the van der Waals interaction beside the externally applied force. Thus, equilibrium of the system is determined by an extremum in the free total energy and subsequently the contact and the adhesion parameters are computed for that particular position. The model...

of the Thesis Dislocation-Based Finite Element Modelling of Elasto-plastic Material Deformation

Although negligible at macroscopic scales, capillary forces become dominant as the sub-millimetric scales of micro-electro-mechanical systems (MEMS) are considered. We review various situations, not limited to micro-technologies, where capillary forces are able to deform elastic structures. In particular, we define the different length scales that are relevant for 'elasto-capillary' problems. W...

A Meshless Local Petrov-Galerkin (MLPG) method has been developed for solving 3D elastodynamic problems. It is derived from the local weak form of the equilibrium equations by using the general MLPG concept. By incorporating the moving least squares (MLS) approximations for trial and test functions, the local weak form is discretized, and is integrated over the local sub-domain for the transien...

Abstract A mixed u–p edge-based smoothed particle finite element formulation is proposed for computational simulations of viscous flow. In order to improve the accuracy standard method, and face-based smoothing operations on displacement gradient are 2D 3D analyses, respectively. Consequently, spatial integration involving operator performed domains. The constitutive model based an elasto-visco...

A physically based elasto-visco-plastic constitutive model is presented and compared to experimental results for a DD14 mild steel. The model requires significantly fewer material parameters compared to other visco-plasticity models from the literature while exhibiting very good accuracy. Accordingly, the parameter identification is simple and intuitive, requiring a relatively small set of expe...

We present a numerical method for computing elasto-plastic ows in metals. The method uses a conservative Eulerian formulation of elasto-plasticity together with a higher-order Godunov nite diierence method combined with tracking of material boundaries. The Eulerian approach avoids the problem of mesh distortion caused by a Lagrangian remap, and can be easily extended to the computation of ows i...