Three-dimensional enriched finite elements are used to compute mixed-mode stress intensity factors (SIFs) for three-dimensional cracks in elastic functionally graded materials (FGMs) that are subject to general mixed-mode loading. The method, which advantageously does not require special mesh configuration/modifications and post-processing of finite element results, is an enhancement of previou...

in this study, behavior of pin-loaded glass fiber reinforced with polyethylene laminated composites with different stacking sequence and different dimensions has been observed experimentally and stress analysis was performed using ansys software. the aim is to investigate stresses, failure strength and failure mode of composite laminates containing a pin loaded hole when the material exhibits l...

The initiating explosive devices are prohibited in rock breaking near the goaf of the highly gassy mine. It is effective and applicable to cracking the hard roof with static cracking agent. By testing the static cracking of cubic limestone (size: 200 × 200 × 200 mm) with true triaxial rock mechanics testing machine under the effect of bidirectional stress and by monitoring the evolution process...

Abstract. Eddy current testing using a pickup coil is usually applied to the surface detection of cracks because of its high frequency. However, for metal infrastructure, detection of not only the surface but also internal cracks is desired. Therefore, we have developed a low-frequency eddy current testing system to inspect interior structures using a magneto-resistive (MR) sensor with a wide m...

Near edge "ne structure has the potential to solve problems related to localised electronic states and bonding. Theory and calculation provide the link between electronic or structural properties and features observed in an electron loss spectrum. A hierarchy of approximations for the calculation of near edge structure features is introduced and the importance of using a self-consistent charge ...

An experimental study of cracks that develop during the annealing of hydrogen-rich amorphous silica films deposited on crystalline silicon substrates shows an interesting duality of behaviour. Cracks in films deposited on cubic (001) silicon surfaces tend to form in two principal directions, cube-edge directions such as [100] or diagonal directions [110] and, while the [100] cracks are straight...