This paper presents a new dimensional decomposition method for obtaining probabilistic characteristics of crack-driving forces and reliability analysis of general cracked structures subject to random loads, material properties, and crack geometry. The method involves a novel function decomposition permitting lower-variate approximations of a crack-driving force or a performance function, Lagran...

This study presents a numerical modelling framework based on complex variable meshless methods, which can accurately and efficiently track arbitrary crack paths in two-dimensional linear elastic solids. The key novelty of this work is that the proposed scheme enables direct element-free approximation for solutions fracture mechanics problems. moving least-squares with group simple polynomial ba...

A study has been conducted to evaluate the mechanical and fatigue crack propagation properties of wire + arc additively manufactured ER70S-6 components. parallel-built deposition strategy was employed fabricate wall. The hardness values were slightly higher at bottom top wall due presence Widmanstätten ferrite carbides. characterization in both orientations; parallel perpendicular direction sho...

A recently developed peridynamic (PD) shell model based on the ordinary state-based theory is adopted to evaluate stress intensity factors (SIFs) under in-plane loading. Strain and components are obtained by introducing differential operator. In order mixed-mode SIFs, domain form of interaction integral employed. The adaptive dynamic relaxation technique utilized obtain steady-state solutions, ...

In mode II interlaminar fracture toughness tests of composite laminates, the evaluated based on linear elastic mechanics deviates from true due to material nonlinearity matrix. this study, an elastoplastic finite-element analysis was performed a new quasi-static test, i.e., doubly end-notched tension (DENT) investigate difference between perceived energy release rate and J-integral. The effect ...

Recent advances in single molecule mechanics have made it possible to investigate the mechanical anisotropy of protein stability in great detail. A quantitative prediction of protein unfolding forces at experimental time scales has so far been difficult. Here, we present an elastically bonded network model to describe the mechanical unfolding forces of green fluorescent protein in eight differe...

This work investigated how the structure size affects quasi-static and fatigue behaviors of graphene polymer nanocomposites, a topic that has been often overlooked. The results showed both failure these materials scale nonlinearly with due to presence significant fracture process zone (FPZ) ahead crack tip induced by nanomodification. Such complicated effect scaling in either or scenario cannot...

Examining a nonlinear instability of sliding rate on a frictional interface of elastic bodies, we investigate whether laboratory-constrained frictional relations suggest universal scaling under even the simplest of configurations. We find blowup solutions by solving an equivalent, classical problem in fracture mechanics. The solutions are fixed points of a dynamical system and we show that thei...