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首页> 外文期刊>Journal of Materials Research >Indentation experiments and simulation of ovine bone using a viscoelastic-plastic damage model
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Indentation experiments and simulation of ovine bone using a viscoelastic-plastic damage model

机译：利用粘弹塑性损伤模型进行压痕实验和模拟羊骨

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摘要

Indentation methods have been widely used to study bone at the micro- and nanoscales. It has been shown that bone exhibits viscoelastic behavior with permanent deformation during indentation. At the same time, damage due to microcracks is induced due to the stresses beneath the indenter tip. In this work, a simplified viscoelastic-plastic damage model was developed to more closely simulate indentation creep data, and the effect of the model parameters on the indentation curve was investigated. Experimentally, baseline and 2-year postovariectomized (OVX-2) ovine (sheep) bone samples were prepared and indented. The damage model was then applied via finite element analysis to simulate the bone indentation data. The mechanical properties of yielding, viscosity, and damage parameter were obtained from the simulations. The results suggest that damage develops more quickly for OVX-2 samples under the same indentation load conditions as the baseline data.
机译：压痕方法已被广泛用于研究微米和纳米级的骨骼。已经表明，骨表现出在压痕过程中具有永久变形的粘弹性行为。同时，由于压头尖端下方的应力而导致由于微裂纹而引起的损坏。在这项工作中，开发了简化的粘弹塑性损伤模型以更紧密地模拟压痕蠕变数据，并研究了模型参数对压痕曲线的影响。实验中，准备并压痕基线和卵巢切除后2年（OVX-2）绵羊（绵羊）骨样品。然后通过有限元分析应用损伤模型以模拟骨骼压痕数据。通过模拟获得了屈服，粘度和损伤参数的机械性能。结果表明，在与基准数据相同的压痕载荷条件下，OVX-2样品的损伤发展更快。

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  • 来源
    《Journal of Materials Research》 |2012年第1期|p.368-377|共10页
  • 作者

    Yang Zhao; Ziheng Wu; Simon Turner; Jennifer MacLeay; Glen L. Niebur; Timothy C. Ovaert;

  • 作者单位

    Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556;

    Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556;

    Department of Clinical Sciences, College of Veterinary Medicine & Biomedical Sciences, Colorado State University,Fort Collins, Colorado 80523;

    Department of Clinical Sciences, College of Veterinary Medicine & Biomedical Sciences, Colorado State University,Fort Collins, Colorado 80523;

    Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556;

    Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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