Unsworth A, Strozzi A
School of Engineering, University of Durham.
Proc Inst Mech Eng H. 1995;209(1):59-64; discussion 71-2. doi: 10.1243/PIME_PROC_1995_209_317_02.
A finite element analysis has been performed for a hip replacement incorporating an elastomeric surface layer. The effects of assuming the elastomer as incompressible have been examined for imposed loads, by comparing the incompressible solution to that using accurately measured values for Poisson's ratio, and while deflections were found to be significantly different, the changes in maximum pressure in the contact, maximum shear stress, contact angle and angular position to maximum shear stress were all small (less than 10 per cent). Comparisons have also been made between the finite element results for ABAQUS and an asymptotic solution, and it was found to be important to use the numerical model particularly at small values of clearance.
对带有弹性体表面层的髋关节置换物进行了有限元分析。通过将不可压缩解与使用泊松比精确测量值的解进行比较，研究了将弹性体假定为不可压缩对施加荷载的影响。虽然发现挠度有显著差异，但接触处的最大压力、最大剪应力、接触角以及最大剪应力的角位置的变化都很小（小于10%）。还对ABAQUS的有限元结果与渐近解进行了比较，发现使用数值模型很重要，尤其是在间隙值较小时。
