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Constitutive models for impacted morsellised cortico-cancellous bone

机译:杂碎的皮质-松质骨的本构模型

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Constitutive models are developed, based on the results of confined compression testing, to describe the visco-elastic, and non-linear elasto-plastic behaviour of morsellised cortico-cancellous bone (MCB). It is found that the elastic modulus, E of MCB can be expressed as a linear function of the applied pressure, p. E varied from 3 to 30 N/mm(2) for pressures up to 1 N/mm(2). The visco-elastic behaviour of MCB can be described using a fourth-order Prony series. The plastic behaviour of MCB can be described using a Drucker Prager Cap (DPC) yield criterion, in which consolidation behaviour is described using an exponential function. The developed relationships allow MCB to be included in a realistic manner in finite element models, for example of the acetabular construct, following revision hip arthroplasty, carried out using the SlooffLing impaction grafting technique. (C) 2005 Elsevier Ltd. All rights reserved.
机译:基于有限压缩测试的结果,开发了本构模型,以描述细碎的皮质-松质骨(MCB)的粘弹性和非线性弹塑性行为。可以发现,MCB的弹性模量E可以表示为施加压力p的线性函数。对于高达1 N / mm(2)的压力,E从3到30 N / mm(2)不等。可以使用四阶Prony系列描述MCB的粘弹行为。可以使用Drucker Prager Cap(DPC)屈服准则来描述MCB的塑性行为,其中使用指数函数描述固结行为。所建立的关系允许将MCB以逼真的方式包含在有限元模型中,例如,在髋关节置换术之后,使用SlooffLing冲击移植技术进行的髋臼构造。 (C)2005 Elsevier Ltd.保留所有权利。

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