Damage models for ductile materials typically need to be parameterized, often with the appropriate parameters changing a given material depending on loading conditions. This can make parameterizing these computationally expensive, since an inverse problem must solved each condition. Using standard modeling techniques requires hundreds or thousands of high-fidelity computer simulations estimate ...

The use of high strength steel (HSS) cold-formed hollow section is significant interest in the construction sector due to competitive costs. accurate simulation ductile fracture failure at micro and macro scale critical for improving validity predicting structural behaviour HSS sections welded joints. In this study, S700 material studied using Gurson-Tvergaard-Needleman (GTN) damage model. Repr...

Ductile-brittle fracture transition was investigated using compact tension (CT) specimens from -70 o C to 40 o C for a carbon steel. Large deformation finite element analysis has been carried out to simulate the stable crack growth in the compact tension (CT, a/W=0.6), three point-point bend (SE(B), a/W=0.1) and centre-cracked tension (M(T), a/W=0.5) specimens. Experimental crack tip opening di...

We perform a large-scale statistical analysis (>2000 independent simulations) of the elongation and rupture of gold nanowires, probing the validity and scope of the recently proposed ductile-to-brittle transition that occurs with increasing nanowire length [Wu et al. Nano Lett. 2012, 12, 910-914]. To facilitate a high-throughput simulation approach, we implement the second-moment approximation ...

The enrichment of coalbed methane (CBM) and the outburst of gas in a coal mine are closely related to the nanopore structure of coal. The evolutionary characteristics of 12 coal nanopore structures under different natural deformational mechanisms (brittle and ductile deformation) are studied using a scanning electron microscope (SEM) and low-temperature nitrogen adsorption. The results indicate...