摘要
多孔材料不仅可以减少材料消耗,还可降低材料的弹性模量,使其达到与自然人体骨弹性模量相匹配的效果。由于Ti6Al4V具有很好的生物相容性,多孔Ti6Al4V的研究在生物医学领域中尤为重要。研究了相近孔隙率下,空心立方、G7、中心立方结构的力学性能,通过扫描电镜及金相实验,分别对SLM加工制造的表观形貌和微观组织进行分析。通过压缩实验及Abaqus有限元分析的方法,将两种方式得出的应力-应变曲线进行了比较,发现模拟结果较好的预测多孔材料的最大抗压强度,并通过等效应力和等效塑性应变云图解释了实际实验中这三种晶胞结构产生相应失效形式的原因。
Porous materials can not only reduce the material consumption,but also reduce the elastic modulus of material,so that it can match the natural human bone elastic modulus.The study of porous Ti6Al4V is particularly important in the biomedical field because of its good biocompatibility.The mechanical property of hollow cube,G7 and central cubic structures with similar porosity were studied.The apparent morphology and microstructure of SLM fabrication were analyzed by scanning electron microscopy and metallographic experiments.Secondly,through the compression experiment and the Abaqus finite element analysis method,the comparison of the stress-strain curve was obtained by the two ways,the simulation can better predict the maximum compressive strength of porous material.The practical experiments of the three causes of failure forms corresponding cell structure is explained by equivalent stress and equivalent plastic strain nephogram.
作者
张建国
赵晟
胡凤玲
宋亮
周琼
张而耕
ZHANG Jianguo;ZHAO Sheng;HU Fengling;SONG Liang;ZHOU Qiong;ZHANG Ergeng(School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Department of Stomatology,Zhongshan Hospital,Fudan University,Shanghai 200032,China;Department of Stomatology,Shanghai Fifth People's Hospital,Fudan University,Shanghai 200240,China;Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment,Shanghai Institute of Technology,Shanghai 201418,China)
出处
《热加工工艺》
北大核心
2023年第10期43-47,共5页
Hot Working Technology
基金
上海市自然科学基金项目(19ZR1455100)
上海市闵行区自然科学研究课题项目(2019MHZ039)。
