A non-destructive testing method on Glass Fibre Reinforced Polymer (GFRP) after high velocity impact event using single stage gas gun (SSGG) is presented. Specimens of Ctype and E-type fibreglass reinforcement, which were fabricated with 6mm, 8mm, 10mm and 12mm thicknesses and size 100 mm x 100 mm, were subjected to a high velocity impact with three types of bullets: conical, hemispherical and ...

The interesting fight between crackers518 and DRM systems is not a match just for the sake of entertainment. It also has consequences in the real world. The cracker itself is not the most terrible danger. He is only one person who uses the forbidden digital right for own purposes. It gets more dangerous when he shares his knowledge on cracking with others. Everybody has access to all kinds of i...

The effects of hydrostatic extrusion on particle cracking and on the subsequent tensile properties of some prototypical particlereinforced metal–matrix composites are investigated. In most cases, tensile failure occurs through a plastic instability in accordance with the Considere criterion for necking. The corresponding failure strain is therefore dictated by the global flow and hardening char...

The weldability of GTD-111 nickel-based superalloy by pulsed Nd:YAG laser welding with an average power of 250 W was studied, and the microstructural evolution and cracking characteristics were also investigated. The solidification cracking of the fusion zone (FZ) and the intergranular liquation cracking in the heat affected zone (HAZ) were observed in the joint. Solidification cracking was cau...

the fact that contraction produced by melting ice I offsets expansion produced by melting high-pressure ice phases. Solid– We explore the hypothesis that passage through an eccentricsolid phase transitions cause negligible satellite expansion. Lithity-pumping resonance could lead to the resurfacing of Ganyospheric stresses caused by expansion of 2% over 10 to 10 mede. To do so, we couple R. Mal...

Plastic cracking of concrete such as plastic settlement and plastic shrinkage cracking is directly related to the bleeding of concrete, which is a natural time-dependent process in a fresh concrete mix. A portion of the mixing water together with very fine materials finds its way to the surface of the concrete during this process. The rapid rate of initial bleeding slows down with the elapsed t...

Fewer reports regarding the portable FDM machine has encourage the study about the capability of the machine to be used as sacrificial master pattern in investment casting for small production of castings. This study presents an analysis of cracking on ceramic shell during burnout process to determine the maximum value of the hoop stress towards pattern itself and also hoop stress on ceramic sh...

concrete is one of the most important construction materials widely using in hydraulic structures, such as lining of irrigation canals. concrete durability might be decreased due to the environmental or inner factors with physical, chemical or mechanical reactions. since, the climatologically condition is variable in most part of the country, local studies are needed to evaluate of the weakness...

Abstract Permeability enhancement of low permeability coal seams is a key tool in mine gas extraction and utilization. Numerical investigations are used to analyze the geometric parameters drilled cavity effect initial pressure on explosion explore potential original blasting enhancing crack penetration seams. On basis these analyses, changes characteristic body under examined. The results show...