干聪,田晓耕,汪振兴,郭钊

• 1:西安交通大学机械结构强度与振动国家重点实验室
• 2:西安前沿动力软件开发有限责任公司

摘要(Abstract)：

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。

关键词(KeyWords)： 火箭橇测试试验;Johnson-Cook本构模型;凿削效应;物质点法;温度变化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(11732007)

作者(Author): 干聪,田晓耕,汪振兴,郭钊

DOI: 10.13289/j.issn.1009-6264.2020-0130

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