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基于超声激励技术研究孔隙率对杨氏模量的影响

发表时间:2014-05-15  浏览量:1752  下载量:716
全部作者: 王成成,林江莉,陈科,尹光福
作者单位: 四川大学材料科学与工程学院
摘 要: 基于超声激励技术,结合有限元数值仿真模拟超声激励实体无孔材料,使其产生振动,获取其声学响应信号,对比该实体无孔材料开孔后的声学响应信号,调整实体无孔材料的有效杨氏模量,直至2次信号的差异最小,以此推算出开孔后材料的有效杨氏模量,然后改变孔隙的数量与分布以研究孔隙对多孔材料杨氏模量的影响。研究发现:对于孔隙均匀分布的多孔材料,其有效杨氏模量随孔隙率的增大而减小,具有一定的规律性,并且多个孔对有效杨氏模量的改变量等于各单个孔改变量之和。这为在体无损检测组织工程材料的孔隙率提供了可能。
关 键 词: 特种功能无机非金属材料;超声激励;组织工程支架材料;有限元仿真;孔隙
Title: Porosity effect on Young’s modulus based on ultrasound vibrometry
Author: WANG Chengcheng, LIN Jiangli, CHEN Ke, YIN Guangfu
Organization: College of Materials Science and Engineering, Sichuan University
Abstract: Based on ultrasound vibrometry, combined with the finite element numerical simulation, this paper incentives the non-porous solid material to vibrate in response to the acoustic signal, and gets its acoustic response signal, and then compares with the response signal of the above entity material with pores. On this basis, the non-porous solid material Young’s modulus is adjusted to make the smallest difference between the two acoustic response signals, on this account the effective Young’s modulus of the porous material is calculated. The above-mentioned simulation experiment is replicated with the changes of the quantity and distribution of pores. The study reveals the effective Young’s modulus of the porous material with a uniform distribution decreases with increasing pores, which has a certain regularity. And the change of the multiple pores to the effective Young’s modulus is equal to the sum of the variation of individual pore. This provides the possibility for the non-destructive testing porosity of scaffold.
Key words: special function inorganic nonmetal material; ultrasound vibrometry; tissue engineering scaffold material; finite element simulation; porosity
发表期数: 2014年5月第9期
引用格式: 王成成,林江莉,陈科,等. 基于超声激励技术研究孔隙率对杨氏模量的影响[J]. 中国科技论文在线精品论文,2014,7(9):871-875.
 
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