摘要
用相对线密度ρ描述骨小梁上裂纹的分布;利用均匀化方法研究了微裂纹的密度、长度和方向对骨小梁刚度的影响。骨小梁的刚度与微裂纹的长度密切相关,当微裂纹长度增加时,与微裂纹垂直方向上的骨小梁刚度下降很快;骨小梁的刚度与微裂纹的密度密切相关,当微裂纹的密度增大时,3个方向上的刚度以相同的比率缓慢下降,以对与裂纹垂直方向的E影响最大;骨小梁的刚度与裂纹的方向也有密切关系。松质骨的力学性质与其微结构和骨小梁的力学性质有关;松质骨的损伤主要与骨小梁的损伤和损伤分布有关。
The homogenization theory was used to discuss the rigidity of the trabecular bone. The rigidity of the trabecular bone depended fundamentally on the length and the density of the microcracks. The rigidity in three directions decreased at the same rate as the density of the microcracks increases, which affectd the elastic modulus E in the direction perpendicular to microcrack most deeply.The extended direction of microcrack also affectd the rigidity of the trabecular bone. The mechanical characteristic of cancellous bone depended on the microstructure and the mechanical characteristic of the trabecular bone. The damage of cancellous bone mainly depended on the damage of trabecular bone and distribution of the microcracks on trabecular bone.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第2期169-173,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
教育部博士学科点专项基金资助项目(20020183026)
国家自然科学基金资助项目(10372034)
吉林省科技发展计划资助项目(20010527).
关键词
骨小梁
微裂纹
弹性模量
均匀化方法
trabecular bone
microcrack
elastic modulus
homogenization method
