基于三维有限元法模拟分析六面顶顶锤的热应力

以有限元法为理论分析手段模拟分析了国产六面顶压机配套顶锤内部的温度场和热应力分布.探寻出了XKY-6×2000 MN型六面顶压机顶锤内部的温度场分布以及热应力取值.模拟结果表明加热顶锤内部温度分布不均匀，不均匀的温度分布产生了热剪切应力，热剪切应力峰值达到0.62 GPa，分布在41.5°小斜面上.加热顶锤内部的剪切应力值较非加热锤内部的剪切应力值高出18.0％.模拟分析结果与金刚石的高压合成实验事实相符，在理论上解释了加热顶锤使用寿命较非加热顶锤使用寿命短的原因，此项工作对于提高大顶锤使用寿命，降低生产 关键词： 热应力 顶锤 有限元法 工业金刚石

Finite element simulations of thermal-stress on cemented tungsten carbide anvil used in cubic high pressure apparatus

Based on the theoretical analysis, we performed finite element simulation of high pressure experiment in multi-anvil devices （XKY-6×2000 MN） to determine the temperature and the stress in WC anvil. The simulated results show that the temperature is not uniform, and the ununiform temperature can produce thermal-shear stress in the anvil. The peak value of thermal-shear stress lies on the beveling edge of the anvil, the peak value of thermal-shear stress is 0.62 GPa, which is 18 percent that of unheated anvil. The simulation results have been verified by high pressure synthesis experiment. We developed a new method to simulate the stress of WC anvil at high pressure and high temperature. This would greatly help the design of anvil with safe dimension.