摘要
针对H90黄铜合金的高速摩擦磨损行为及失效机制,利用ANSYS/LS-DYNA动力学软件建立了H90黄铜/钢球摩擦副高速滑动有限元模型,对黄铜平板的往复式高速摩擦磨损行为进行了数值模拟。结果表明,摩擦热和塑性功热造成摩擦接触表面材料急剧温升,添加材料单元的临界温度失效控制准则能够有效模拟材料因动态再结晶软化导致的失效磨损行为。高速滑动摩擦仅在距接触面表层下几十微米区域产生严重磨损,其等效应力和应变等值线呈孤岛状不连续分布特性。得到的微观变形失效特征与试验观测吻合较好。
Aiming at the high speed fiction and wear behavior and the failure mechanism of H90 brass alloy,the finite element model of high speed sliding of H90 brass/steel ball friction pair was established using ANSYS/LS-DYNA dynamics software,and the numerical simulation of the reciprocating high speed friction and wear behavior of brass slab was carried out. The results show that the friction heat and plasticity work heat causes the temperature of material on friction contacting surface increases sharply. Adding the critical temperature failure controlling criterion of material element can effectively simulate the failure wear behavior of material caused by dynamic recrystallization softening. High speed sliding friction only produces severe wear in the zone with distance dozens of microns from the contacting surface layer,and the equivalent stress and strain contour lines present discontinuous distribution characteristic with isolated island shape.The obtained microscopic deformation failure characteristic is in good agreement with that of test observation.
作者
王猛
王舜
冯小亮
郭策安
WANG Meng;WANG Shun;FENG Xiao-liang;GUO Ce-an(School of Equipment Engineering,Shenyang Ligong University,Shenyang 110159,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第9期177-183,共7页
Journal of Plasticity Engineering
基金
辽宁省教育厅科学研究经费资助项目(LG202013)。
关键词
摩擦磨损
失效机制
动态再结晶
有限元模拟
H90黄铜
friction and wear
failure mechanism
dynamic recrystallization
finite element simulation
H90 brass
