Using the slant cracks with smaller slant angle ofβ=45 deg,the effect on modeⅠstress intensity factor (K_Ⅰ)_(mes) and modeⅡstress intensity factor(K_Ⅱ)_(mes) due to the compressive residual stress and the crack surface contact were discussed.

With the X-ray stressmeasurer, the residual stress of machined surface was measured when aluminum alloy be fine-cutted by cemented carbide on different cutting condition.

Through the analysis of the microstructure,hardness and the distribution of residual stress of the die working surface machined by WEDM,the influences of WEDM on the quality of the die working surface are stated.

Study on paclobutrazol(MET)remains in rape seeds and soil;

The results indicate that the essential strain found according to recrystallization rule is not only closer to actual value but also more accordant with theoretic results, than by calculating the rate of remnant strain.

By using the deformation model proposed in paper [1] and the calculated results of the stresses, the expressions of tensile and compressive elastic moduli and yield strengths in the absence of thermal residual stresses were derived, which exhibit good agreement with the experimental results.