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Strain effects on valence band structure in bulk and thin film In0.7Ga0.3As was presented, including in-plane biaxial and uniaxial stress. The impact on energy band splitting and warping, and effective mass are evaluated by 6×6 k·p method. The dependence of the valence band structures on the body thickness was also studied.
A single crankshaft of 8L250 diesel engine using a finite element model is established, which used Pro-E and ANSYS-workbench software in this paper, and a finite element analysis is done in force and displacement boundary conditions. The maximum stress point is found, and under the premise of not affecting the basic structure of the crankshaft the optimization improvements to reduce the stress concentration...
DRS-1 high normal stress direct and residual shear apparatus was used to study the direct shear mechanical characteristics of the sand with different granular diameter under different normal stress. The results show that for three kinds of sand (coarse sand, medium sand and fine sand) the curve of shear stress-shear displacement presents strain softening when the normal stress, σ, is less than, or...
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