Materials fail by the nucleation and propagation of a crack, the critical condition of which is quantitatively described by fracture mechanics that uses an intensity of singular stress field characteristically formed near the crack-tip. However, the continuum assumption basing fracture mechanics obscures the prediction of failure of materials at the nanoscale due to discreteness of atoms. Here,...

Carbon fiber-reinforced plastic (CFRP) is used widely in aerospace. The cutting mechanism of CFRP markedly different from that metals due to anisotropic and non-homogeneous material structure. mechanisms are highly dependent on the fiber orientation. quality machined surface can be affected by fracture models. In this paper, based elastic foundation beam theory Hertzian contact theory, mechanic...

Numerical methods such as boundary element and finite element methods are widely used for the stress analysis in solid mechanics. This study presents boundary element method based on the displacement discontinuity formulation to solve general problems of interaction between hydraulic fracturing and discontinuities. The crack tip element and a higher order boundary displacement collocation techn...

The mechanical strength of pharmaceutical compacts is an important in-process control parameter to ensure that tablets have sufficient strength to withstand handling during production, transport and use. The introduction of the “Brazilian test” into the pharmaceutical sciences by Fell and Newton has enabled a fundamental understanding of the stresses involved in the breaking of compacts and pro...

The modelling of fracture initiation and propagation is a nontrivial problem in computational mechanics. However, it an area that extremely important engineering applications, requiring accurate robust numerical methods can be applied to variety materials. This paper presents the development new approach, which combines material, or configurational, forces material point method (MPM), for finit...

Herein, Compact-Testing (CT ) and Charpy V-Notch (CVN) testing have been done on four Friction-Stir-Processed (FSPed) samples: BM (Base-Metal), FS (FSPed-Sample), FN5 (FSP Nano-ZrO2-coated/560 rpm rotational speed) and FN9 (FSP Nano-ZrO2-coated/900 rpm), to investigate the KIC and the dominant parameters on it for St 37 steel. Experiments are also surveyed and validated by ABAQUS. Results showe...

Abstract An influence of the bi-material interface between a steel substrate and thin protective layer applied through laser cladding was investigated. A range elastic properties thicknesses were considered to cover behaviour short crack in selected materials such as bronze, nickel or cobalt alloys. The special case terminating directly at investigated, which is connected necessity application ...

Results of molecular-mechanics simulations of axial and torsional deformations of a single wall carbon nanotube are used to find Young’s modulus, the shear modulus, and the wall thickness of an equivalent continuum tube made of a linear elastic isotropic material. These values are used to compare the response of the continuum tube in bending and buckling with that obtained from the molecular me...

numerical methods such as boundary element and finite element methods are widely used for the stress analysis in solid mechanics. this study presents boundary element method based on the displacement discontinuity formulation to solve general problems of interaction between hydraulic fracturing and discontinuities. the crack tip element and a higher order boundary displacement collocation techn...

A cohesive element formulation is proposed that provides a general framework to approximate experimentally measured Traction–Separation Law (TSL) shapes. Unlike other approaches, it does not assume specific TSL shapes, such as bi-linear or exponential. The shapes are defined generally, in piecewise-linear fashion, and Mode I shear (Mode II III) TSLs can have different Furthermore, added general...