The mechanical property of the coating is greatly improved due to the polishing and squeezing of the free particles. The micro hardness doubles and the tensile intensity increases by over 90%.
电铸层的机械性能也得到了明显的改善，显微硬度和抗拉强度比传统电铸工艺提高了一倍左右。
The stress intensity factors K1 of various position of welded joint were measured by single edge precracked tensile specimen.
用单边预裂纹拉伸试样测定了焊接接头各部位的应力强度因子K1值。
Then, the criteria of hydraulic fracturing of different tensile cracks are discussed. The mechanism and formula for stress intensity factor are put forward.
然后研究压剪断裂的力学机理，分析有水压力作用的压剪断裂应力强度应力的计算及其断裂判据。
Then, the criteria of hydraulic fracturing of different tensile cracks are discussed. The mechanism and formula for stress intensity factor are put forward.
然后研究压剪断裂的力学机理，分析有水压力作用的压剪断裂应力强度应力的计算及其断裂判据。
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