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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >The Research of Continuous Water Jet Critical Shot Peening Pressure
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The Research of Continuous Water Jet Critical Shot Peening Pressure

机译：连续水射流临界喷丸强化压力的研究

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摘要

Continuous water jet critical shot peening pressure was studied through two ways of academic analysis and experimental research. Taking the nozzle whose outlet is taper constringency with column section as an example and taking jet as the total flow which is made up of countless column element flow and then making impact that jet effects on the target surface as turbulent flow jet dynamic load, concerning about target surface's elastic deformation, according to the velocity of jet, impact radius effected on target surface by jet and the dynamic water pressure effected on target surface by element flow in jet, a dynamic water pressure distributing model effected on target surface by continuous water jet shot peening is established. Taking target body as a homogeneous isotropic elastic half-space body, according to the resolution of Boussinwsq, the analysis shows stress distributing effected on target symmetry axis by load. According to the Mises yield qualification, the formula of critical shot peening pressure is presented. To validate the correctness of academic analysis, taking 45 steel as target material to do material unilateralism tension test with MTS 810 Material Test System, getting the elastic modulus and conditional yield stress of 45 steel ,and calculating the critical shot peening pressure on the condition of given shot peening. Do critical shot peening pressure experiment to 45 steel with continuous water jet and also residual stress measurement of specimen surface layer was done with X-ray stress instrument. The result indicates that the academic count value of critical shot peening pressure and experiment data inosculate basically.
机译：通过学术分析和实验研究两种方法研究了连续水射流临界喷丸强化压力。以出口为锥形截面的喷嘴为例，以射流为总流量，该总流量由无数的柱元流组成，然后以湍流射流动载荷的形式影响射流对目标表面的影响，关于根据射流的速度，射流对靶面的冲击半径以及射流中元素流对靶面的动态水压，根据靶面的弹性变形，通过连续水射流对靶面的动水压力分布模型喷丸建立。以目标体为均质各向同性弹性半空间体，根据Boussinwsq的分辨率，分析显示了应力在目标对称轴上的应力分布。根据米塞斯屈服准则，提出了临界喷丸压力的公式。为了验证理论分析的正确性，以45钢为靶材，用MTS 810材料测试系统进行材料单侧拉力试验，求得45钢的弹性模量和条件屈服应力，并计算出在以下条件下的临界喷丸压力。进行喷丸处理。用连续水射流对45钢进行临界喷丸压力试验，并用X射线应力仪进行试样表面层的残余应力测量。结果表明，临界喷丸压力的理论值与实验数据基本吻合。

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