摘要
基于物质点法,首先完成了滑靴材料(C300)和滑轨材料(U75V)动态本构关系的验证,表明靴轨材料的本构模型参数(J-C模型)可以扩展至中高应变率情形,能够准确地描述材料中高应变率的动态力学行为;进而研究了由于滑靴与滑轨的摩擦造成滑靴表面的温度上升对靴轨间发生凿削临界速度的影响。结果表明:滑靴与滑轨接触表面的温升提高了靴轨间发生凿削的临界速度,靴轨间的摩擦温升对于提高火箭橇的运行速度是有利的。研究成果可为加深靴轨凿削机理认识、保证火箭橇试验系统安全高速的运行提供可靠的理论支撑。
Based on the material point method(MPM), the dynamic constitutive relationship between the slipper material(C300) and the rail material(U75 V) was verified, indicating that the constitutive model parameters of these materials’ J-C models could be extended to the case of medium-high strain rate, which could accurately describe the dynamic mechanical behavior of the material with high strain rate. Then, the influence of the temperature rise on the surface of the slipper and rail caused by friction on the critical velocity of gouging was studied. The results show that the temperature rise of the contact surface between the slipper and the rail increases the critical velocity of gouging between the slipper and the rail, and it is beneficial to improve the running speed of the rocket sled test. The research results can provide a reliable theoretical support for deepening the understanding of shoe-rail gouging mechanism and ensuring the safe and high-speed operation of the rocket sled test system.
作者
干聪
田晓耕
汪振兴
郭钊
GAN Cong;TIAN Xiao-geng;WANG Zhen-xing;GUO Zhao(State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an Advanced Dynamics Software Development Co Ltd,Xi’an 710049,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第10期143-154,共12页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(11732007)。
