Measurement of shot velocity using particle image velocimetry and numerical analysis of residual stress at two shot peening conditions
Measurement of shot velocity using particle image velocimetry and numerical analysis of residual stress at two shot peening conditions
复制标题
使用粒子图像测速仪测量喷丸速度并在两种喷丸条件下对残余应力进行数值分析
DOI：
10.1299/mej.20-00152
复制
发表时间：
2020
影响因子：
4.4
通讯作者：
N. Ma
中科院分区：
文献类型：
--
作者：
T. Ohta;N. Ma
喷丸处理应用于许多制造零件，通过在表面附近引入压缩残余应力来提高金属的疲劳强度。残余压应力的分布主要取决于弹丸直径、弹丸速度、入射角和喷丸时间，而喷丸时间又影响覆盖率。在这项研究中，使用粒子图像测速仪（PIV）测量射击在两个不同的空气压力的射击速度。采用有限元方法分析了高强铝合金（A7075-T6）板材喷丸强化过程中残余应力的分布。将注射加速至距喷嘴出口约200 mm的间隔距离。测得的最大喷射速度与空气压力的0.59次方成比例地增加。分析的残余应力分布，使用测量的弹丸速度与PIV通过试样的厚度与两种类型的喷丸条件下，具有不同的空气压力和入射角的测量一致。本研究验证了喷丸速度测量技术和喷丸残余应力分析的数值模型。
Shot peening is applied to many manufactured parts to improve the fatigue strength of metals by introducing compressive residual stress near the surface. The distribution of compressive residual stress is mainly determined by shot diameter, shot velocity, angle of incidence, and peening time which affects coverage. In this study, the shot velocity was measured using particle image velocimetry (PIV) for shots fired at two different air pressures. The finite element method was used to analyze the residual stress distribution in a high strength aluminum alloy (A7075-T6) plate during shot peening. The shot was accelerated up to a standoff distance of approximately 200 mm from the nozzle outlet. The measured maximum shot velocity increased proportionally to the air pressure to the 0.59th power. The analyzed residual stress distributions using measured shot velocity with PIV through the thickness of the specimen agreed well with the measurements under two types of peening conditions with differing air pressure and angle of incidence. The shot velocity measurement technology and the numerical model for analysis of the shot peening residual stres were both validated in this study.
日本喷丸强化协会（金属疲劳与喷丸强化）
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
林武文;吉田英代;H.Soyama
通讯作者：
H.Soyama