A careful analysis of low-frequency seismic events on Soufrièere Hills volcano, Montserrat, points to a source mechanism that is non-destructive, repetitive, and has a stationary source location. By combining these seismological clues with new field evidence and numerical magma flow modelling, we propose a seismic trigger model which is based on brittle failure of magma in the glass transition....

This paper was to verify the STAGS (general shell, geometric and material nonlinear) code and the critical crack-tip-opening angle (CTOA) fracture criterion for predicting stable tearing in cracked panels that fail with severe out-of-plane buckling. Materials considered ranged from brittle to ductile behavior. Test data used in this study are reported elsewhere. The STAGS code was used to model...

In order to investigate the application of JH-2 (Johnson-Holmquist-2) constitutive model in concrete, a series parameters study have been conducted evaluate C30 concrete. The finite element analysis software ABAQUS is utilized simulate compression test three-dimensional standard concrete based on ALE adaptive mesh and damage failure criterion deletion function. numerical 3D pile foundation simp...

A trabecular bone tissue with its complex microstructural morphology can demonstrate a and random pattern of fracture. This paper analyses the effect material’s mechanical behaviour on failure modelling human bone. For this purpose, 3D unit cell was obtained from scans distal tibia performed high-resolution peripheral quantitative computed tomography (HR-pQCT). In simulations, two types fractur...

An experimental investigation of the performance reinforced concrete continuous slabs is presented in this paper, following exposure to different compartment fires. The influence that several factors, including fire scenarios, reinforcement ratio, and bar arrangement, have on deflections, strains, crack patterns, failure modes analysed. Results compared uniform case, localized or extended punch...

This chapter addresses the mechanisms by which instabilities can develop in rocks in the nominally ductile regime under conditions that the authors believe are relevant to Earth. We will not address brittle failure or frictional sliding processes in detail, but much of our discussion will be couched in terms of knowledge gained in studies of these processes. As a consequence, we will begin by d...

Unstable and unpredictable disease control in diabetes or asthma, with frequent hospitalisations, is frequently referred to as 'brittle'. We describe two cases of Addison's disease with recurrent hospitalisations in hypo-adrenal crises. Both patients had significant psychosocial disruption, and failure to take hydrocortisone replacement therapy was admitted in one and biochemically proven in th...