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学科主题临床医学
Progressive post-yield behavior of human cortical bone in compression for middle-aged and elderly groups
Leng, Huijie2; Dong, X. Neil1; Wang, Xiaodu1
关键词Cortical bone Compression Past-yield Aging Energy dissipation
刊名JOURNAL OF BIOMECHANICS
2009-03-11
DOI10.1016/j.jbiomech.2008.11.016
42期:4页:491-497
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Biophysics ; Engineering, Biomedical
资助者NIH/NIA ; NIH/NIA
研究领域[WOS]Biophysics ; Engineering
关键词[WOS]COMPACT-BONE ; MICRODAMAGE ACCUMULATION ; MECHANICAL-PROPERTIES ; ENERGY-DISSIPATION ; RESIDUAL STRENGTH ; CANCELLOUS BONE ; IN-VIVO ; DAMAGE ; FATIGUE ; QUALITY
英文摘要

In this study, a progressive loading regimen (load-dwell-unloading-dwell-reloading) was applied on bone samples to examine the compressive post-yield response of bone at increasing strain levels. Cortical bone specimens from human tibiae of two age groups (middle-aged group: 53 2 years, 4 females and 4 males, elderly group: 83 6 years, 4 females and 4 males) were loaded in compression using the progressive loading scheme. Modulus degradation, plastic deformation, viscous response, and energy dissipation of bone during post-yield deformation were assessed. Although initial modulus was not significantly different between the two age groups, the degradation of modulus with the applied strain in the elderly group was faster than in the middle-aged group. The modulus loss (or microdamage accumulation) of bone occurred prior to plastic deformation. Plastic strain had a similar linear relationship with the applied strain for both middle-aged and the elderly group although middle-aged bone yielded at a greater strain. The viscoelastic time constant changed similarly with increasing strain for the two groups, whereas a higher magnitude of stress relaxation was observed in the middle-aged group. Energy dissipation was investigated through three pathways: elastic release strain energy, hysteresis energy, and plastic strain energy. The middle-aged group had significantly greater capacity of energy dissipation than the elderly group in all three pathways. The information obtained may provide important insights in age-related effects on bone fragility. (c) 2008 Elsevier Ltd. All rights reserved.

语种英语
所属项目编号R01AG022044
资助者NIH/NIA ; NIH/NIA
WOS记录号WOS:000264507300012
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/64102
专题北京大学第三临床医学院_骨科
作者单位1.Univ Texas San Antonio, Dept Mech Engn, San Antonio, TX 78249 USA
2.Peking Univ, Hosp 3, Dept Orthopaed, Beijing 100191, Peoples R China
推荐引用方式
GB/T 7714
Leng, Huijie,Dong, X. Neil,Wang, Xiaodu. Progressive post-yield behavior of human cortical bone in compression for middle-aged and elderly groups[J]. JOURNAL OF BIOMECHANICS,2009,42(4):491-497.
APA Leng, Huijie,Dong, X. Neil,&Wang, Xiaodu.(2009).Progressive post-yield behavior of human cortical bone in compression for middle-aged and elderly groups.JOURNAL OF BIOMECHANICS,42(4),491-497.
MLA Leng, Huijie,et al."Progressive post-yield behavior of human cortical bone in compression for middle-aged and elderly groups".JOURNAL OF BIOMECHANICS 42.4(2009):491-497.
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