DOI: 10.1115/1.4068096 ISSN: 0094-9930
Autofrettage of Ultra-high Pressure Valve Body: Numerical and Experimental Study
Dong Xue, Song Huang, Hu Hui, Mengfei Pang, Yunfei Long, Shijian Chen, Xiaokang Wu, Weiwei Zhou, Yongning GuoAbstract
This work proposed a technique reference on the determination of autofrettage pressure for ultra-high pressure valve. The detailed numerical autofrettage process for a valve body with 340MPa design pressure was established, where material's Bauschinger effect was considered by a Chaboche kinematic hardening model. Validating autofrettage test was conducted at 600MPa and 650MPa hydraulic pressure. The effectiveness of autofrettage result was verified by the surface strain consistency with numerical calculation as well as the existence of plastic strain unraveled by EBSD characterization.