基于COMSOL多孔压电陶瓷力学性能模拟

Simulation of Mechanical Properties of Porous Piezoelectric Ceramics Based on COMSOL

针对创伤、炎症和肿瘤等导致的骨缺损这一修复和重建难题,围绕铌酸钾钠无铅压电陶瓷骨架多孔结构设计的问题开展研究。多孔结构的性能与孔洞形状密切相关,为探明不同孔洞形状对铌酸钾钠陶瓷骨架多孔结构力学性能的影响,采用COMSOL Multiphysics有限元软件对孔洞形状不同的多孔结构建立三维模型并进行静力模拟,分析在受压条件下不同多孔结构力学性能的变化规律。研究结果表明:孔洞截面形状不同时,正方形孔洞结构体压缩时的力学性能优于圆形孔洞结构体和三角形孔洞结构体;截面正方形孔洞数量不同时,截面为16个正方形孔结构体的压缩性能优于截面为25和36个正方形孔结构体。

In order to repair and reconstruct bone defects caused by trauma,inflammation and tumor,the porous structure design of lead-free piezoelectric ceramic skeleton with potassium sodium niobate was studied.The performance of porous structures is closely related to the shape of pores.In order to find out the influence of different shapes of pores on the mechanical performance of porous structures of potassium sodium niobate ceramic skeleton,the finite element software COMSOL Multiphysics is used to simulate the holes of different shapes to establish three-dimensional models and carry out static simulation,and the mechanical performance of different porous structures under pressure are analyzed.The results show that the mechanical performance of square cavity structures under compression are better than those of circular cavity structures and triangular cavity structures.When the number of square holes is different,the compression performance of 16 square holes is better than that of 25 and 36 square holes.