基于有限元法确立碳化钨顶锤的破裂判据

以有限元法为理论基础,通过运行大型有限元软件,成功构建了铰链式六面顶压机配套顶锤的有限元理论模型,并确立了碳化钨顶锤的破裂判据。模拟结果表明:以小斜边末尾处为应力参考点,依据第四强度理论,能够对碳化钨顶锤的性能进行更加合理的数值分析。依据此判据可知:在顶锤锤面及小斜边附近,裂纹高发区分布在小斜边附近;在顶锤轴向上,裂纹高发区分布在距离顶锤锤面30 mm处。铰链式六面顶压机配套碳化钨顶锤的有限元模型以及碳化钨顶锤破裂判据的成功构建,为实现新型碳化钨顶锤的设计与研究奠定了基础,对促进实现铰链式六面顶压机腔体大型化具有现实意义。

The Criterion for Crack of Tungsten Carbide Anvil Based on Finite Element Method

Based on finite element method, the model of tungsten carbide (WC) anvil and the criterion for crack of WC anvil used in China-type cubic high pressure apparatus have been founded successfully. The simulation results indicated that the criterion for crack of WC anvil should make the reference point at the end of bevel edge. According to the von Mises criterion, we know that in the area of anvil surface and bevel edge, the cracks are often arising around the bevel edge. In the axis of anvil, the cracks are often arising at the place which is 30 mm below anvil surface. This study may greatly help to design new type WC anvil and improve the large volume cubic anvil type high pressure techniques.