Study on New Structure of Ultra-High Pressure WC Anvil
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摘要: 基于高压顶砧设计原理——大质量支撑原理，借助有限元仿真技术，开展了一体式超高压碳化钨顶砧新结构的设计与研究工作。研究结果表明, 采用圆角技术以及凹形支撑区技术，设计出的新结构顶砧能够降低传统碳化钨顶砧拐角处的应力集中效应，同时为碳化钨顶砧提供足够的侧向支撑作用，从而大幅提高顶砧的性能；一体式超高压碳化钨顶砧的传压效率较传统顶砧升高58.5%、破裂几率较传统顶砧降低33%、获得的极限腔体压力较传统顶砧升高44.2%，达到9.56 GPa。为大腔体、超高压环境下物质新结构与性质研究、新型功能材料的设计与合成研究提供了一种易于操作的可行性方案。Abstract: Based on the principle of massive support, the parameters of ultra-high pressure tungsten carbide (WC) anvil have been stuied by finite element method.The results indicate that the technologies of radius beveling and concave region can enhance the performence of ultra-high pressure WC anvil, by decreasing the focus phenomenon of stress and increasing the lateral support, respectively.Further more, the pressure transmission efficiency of new anvil is higher compared with the traditional anvil, which can be enhanced about 58.5%.The rate of cracking in new anvil decreases about 33% than that of traditional anvil.The highest sample cell pressure generation by new anvil increases about 44.2% compared with the traditional anvil, which changes from 6.63 GPa to 9.56 GPa.This work represents a new structure of ultra-high pressure WC anvil for study on the novel structure and properties of matter, design and synthesis of functional materials.
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图 6 碳化钨顶砧上分布的von Mises应力路径曲线图
Figure 6. Graph showing the von Mises stress in WC anvil
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