Experimental validation of a microcracking-based toughening mechanism for cortical bone

被引:116
|
作者
Vashishth, D
Tanner, KE
Bonfield, W
机构
[1] Rensselaer Polytech Inst, Dept Biomed Engn, Jonsson Engn Ctr, Troy, NY 12180 USA
[2] Univ London Queen Mary & Westfield Coll, Interdisciplinary Res Ctr Biomed Mat, London E1 4NS, England
[3] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
关键词
cortical bone fracture; crack growth resistance; frontal process zone; crack propagation velocity; antler;
D O I
10.1016/S0021-9290(02)00319-6
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
It has been proposed that cortical bone derives its toughness by forming microcracks during the process of crack propagation Q. Biomech. 30 (1997) 763; J. Biomech. 33 (2000) 1169). The purpose of this study was to experimentally validate the previously proposed microcrack-based toughening mechanism in cortical bone. Crack initiation and propagation tests were conducted on cortical bone compact tension specimens obtained from the antlers of red deer. For these tests, the main fracture crack was either propagated to a predetermined crack length or was stopped immediately after initiating from the notch. The microcracks produced in both groups of specimens were counted in the same surface area of interest around and below the notch, and crack growth resistance and crack propagation velocity were analyzed. There were more microcracks in the surface area of interest in the propagation than in initiation specimens showing that the formation of microcracks continued after the initiation of a fracture crack. Crack growth resistance increased with crack extension, and crack propagation velocity vs. crack extension curves demonstrated the characteristic jump increase and decrease pattern associated with the formation of microcracks. The scanning electron micrographs of crack initiation and propagation displayed the formation of a frontal process zone and a wake, respectively. These results support the microcrack-based toughening mechanism in cortical bone. Bone toughness is, therefore, determined by its ability to form microcracks during fracture. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:121 / 124
页数:4
相关论文
共 50 条
  • [21] Prestress Due to Dimensional Changes Caused by Demineralization: A Potential Mechanism for Microcracking in Bone
    Yener N. Yeni
    Mitchell B. Schaffler
    Gary Gibson
    David P. Fyhrie
    Annals of Biomedical Engineering, 2002, 30 : 217 - 225
  • [22] Microcracking damage and the fracture process in relation to strain rate in human cortical bone tensile failure
    Zioupos, Peter
    Hansen, Ulrich
    Currey, John D.
    JOURNAL OF BIOMECHANICS, 2008, 41 (14) : 2932 - 2939
  • [23] Experimental investigation on the influence of weak interlayers on sandstone rockburst and associated microcracking mechanism
    Ren, Fuqiang
    Song, Tengyuan
    Ma, Ke
    Karakus, Murat
    INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2024, 182
  • [24] Modeling and experimental validation on temperature diffusion mechanism in high-speed bone milling
    Chen Qi-sen
    Liu Yu
    Dong Qiu-shi
    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2020, 286
  • [25] ON GROWTH OF CORTICAL BONE AND MECHANISM OF OSTEON FORMATION
    AMPRINO, R
    ACTA ANATOMICA, 1963, 52 (03): : 177 - &
  • [26] Reaction-induced microcracking: An experimental investigation of a mechanism for enhancing anatectic melt extraction
    Inst. for Mineralogy and Petrography, Swiss Fed. Institute of Technology, Zurich 8092, Switzerland
    不详
    不详
    不详
    Geology, 7 (591-594):
  • [28] Validation of speed of sound for the assessment of cortical bone maturity
    Rose, EC
    Hagenmüller, M
    Jonas, IE
    Rahn, BA
    EUROPEAN JOURNAL OF ORTHODONTICS, 2005, 27 (02) : 190 - 195
  • [29] Effects of cortical bone perforation on experimental guided bone regeneration
    Nishimura, I
    Shimizu, Y
    Ooya, K
    CLINICAL ORAL IMPLANTS RESEARCH, 2004, 15 (03) : 293 - 300
  • [30] Reaction-induced microcracking: An experimental investigation of a mechanism for enhancing anatectic melt extraction
    Connolly, JAD
    Holness, MB
    Rubie, DC
    Rushmer, T
    GEOLOGY, 1997, 25 (07) : 591 - 594