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is the thickness of arch ring; l is the roof span; σmax is the maximum normal stress during the bending of the mid span section of the roof. According to the rock strength theory, plastic failure occurs when... shows that when the stope span is 30 m and the roof thickness is 10 m, the roof comprehensive safety factor is 1.12, which indicates the roof is in a stable state. Key words: deep mining; high stress......
system satisfies the following assumptions: 1) There is no normal stress and shear stress at the free surface of soil, and the soil is infinite in the radial direction. The bottom of the fictitious... J. Cent. South Univ. (2020) 27: 3839-3851 DOI: https://doi.org/10.1007/s11771-020-4503-y Torsional dynamic response of tapered pile considering compaction effect and stress diffusion effect GUAN......
to the radius of the shaft theoretically under the ideal elastic-plastic model and the radical thickness of the surface plastic region is zero, which indicates that the shear stress on the cross section... distributed. Under uniaxial tension, from the elastic stage to the yielding stage and before the necking stage, due to the equal transmission law of uniaxial tensile stress, the distribution of normal......
J. Cent. South Univ. (2021) 28: 1505-1518 DOI: https://doi.org/10.1007/s11771-021-4700-3 Analytical model of shear mechanical behaviour of bolted rock joints considering influence of normal stress... along the rock bolt as if the rock bolt is a rail. The normal stress can inhibit the guide rail effect and reduce the axial force on bolts. However, this factor is not considered by the existing......
is near the compressive limit of diamond material (1.9- 6.9 GPa). Both the maximum tensile stress in thickness direction (σy) and tensile shear stress between two materials occur in the outer edge... residual stress using stress release method In order to investigate the influence of substrate thickness on the thermal residual stress of the diamond table, a procedure called stress release method......
processes was separately measured, and the thickness distribution rule was mainly discussed. Then, the normal distribution function based on statistical analysis for the geometry size of various...为15.8%.此外,截面A-A的最大尺寸偏差为0.19 mm,截面B-B的最大尺寸偏差为0.28 mm.两个典型截面的壁厚分布及尺寸精度均满足设计要求. 关键词:6063铝合金;内高压成形;壁厚分布;尺寸精度 中图分类号:TG394 文献标志码:A Thickness distribution and size deviation of 6063......
Stress corrosion cracking susceptibility of 7A52 aluminum alloy ZHAO Jun-jun(赵军军), WANG Wei-xin(王卫欣), CAI Zhi-hai(蔡志海), ZHANG Ping(张 平) Institute of Remanufacture Engineering, Academy of Armored Force Engineering, Beijing 100072, China Received 28 July 2006; accepted 15 September 2006 Abstract: The stress corrosion sensitivity of 7A52 aluminum alloy was investigated in the artificial......
Evaluation of stress concentration for planar tubular joints M. F. GHANAMEH1, D.THEVENET2, A. ZEGHLOUL1 1. Laboratory of Mechanics and Physics of Materials - U.M.R. CNRS N° 7554, University... stress distribution at the joint intersection of structures. Moreover, the actual load condition of a tubular joint can be any combination of the above three basic load cases, for this reason, a combined......
, and the thickness direction stress is the smallest. The center of the cladding is in the tensile stress condition. The longitudinal tensile stress is higher than the lateral or thickness direction stress... to the contraction in each direction is different. The tensile stress is different. The longitudinal stress is the largest, the transverse stress is the second, and the thickness direction stress is the smallest......
in the normal direction is proportional to the wall thickness whereas the axial counterpart is inversely proportional to the wall thickness. At the same time, both of normal and axial conductive thermal... ARTICLE J. Cent. South Univ. (2019) 26: 2224-2233 DOI: https://doi.org/10.1007/s11771-019-4168-6 Effects of wall thickness and material on flame stability in a planar micro-combustor LIU Lei(刘磊)1......