Precipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional tool. A macrograph of the cross section butt-welded joint shows classical zones for such welding, namely nugget zone, thermo-mechanically affected zone and heat zone. Scanning Electron Microscopy displays grain refining re-formation precipitates in Micro-hardness measurements cross-section perpendicular...

Cohesive zone model (CZM) is commonly used to deal with the nonlinear ahead of crack tips in materials elastoplastic deformation behavior. This capable predicting behavior initiation and growth. In this paper, CZM-based finite element analysis (FEA) performed examine effects processing parameters (i.e., clay nanoparticle volume fraction aspect ratio) mechanical behaviors a polymeric matrix rein...

There is a great risk of roof falls in the advance support section mining face (ASSoMF), and it difficult to control roof. Based on soft Lijiahao coal mine, this paper studies stress distribution ASSoMF space-time evolution surrounding rock plastic zone by using theoretical analysis numerical simulation, reveals its failure mechanism. effect resistance zone, proposed that should mainly adapt ro...

Nowadays, honeypots are widely used to divert attackers from the original target and keep them busy within a decoy environment. DeMilitarized Zone (DMZ) is an important zone for network administrators, because many of the services to the public network is provided at this zone. Many of the security tools such as firewalls, intrusion detection systems and several other secu...

In the process of excavation hydraulic tunnels across fault zone, surrounding rock often lose steady and collapse, which will threaten personal security. this paper, a 3D model was established according to Hami pumped storage power station in Xinjiang. The variation stress, deformation plastic zone under condition full section without support timely after are compares analysis. calculated resul...

In this simulation study, we analyzed the geomechanical response of two known Class 3 permafrost deposits: the Mallik (Northwest Territories, Canada) deposit and Mount Elbert (Alaska, USA) deposit. Gas was produced from these deposits at constant pressure using horizontal wells placed at the top of the hydrate layer (HL). The depressurization-induced dissociation begins at the well bore, and th...