1.1 This guide establishes requirements and considerations for the numerical simulation of nonmodular metallic orthopaedic hip implants using finite element analysis (FEA) techniques. This guide is only applicable to stresses below the yield strength. 1.2 Purpose--This guide establishes requirements and considerations for the development of finite element models to be used in the evaluation of nonmodular metallic orthopaedic hip implant designs under static loading for the purpose of prediction of the stresses seen in the implant. A method is provided for the analysis of nonmodular metallic orthopaedic hip implants under static loading per the ISO 7206-4 standard. Recommended procedures for performing model checks and validation are provided to help determine if the analysis is proceeding along recommended guidelines. Finally, the recommended content of an engineering report covering the mechanical simulations is presented. 1.3 Limits--This document is limited in discussion to the structural analysis of nonmodular metallic orthopaedic hip implants under static loading. This guide does not consider changes to possible support conditions or load variations over time related to bone remodeling, nor does it consider the distributed bone properties of bone models, which may have implications on stress shielding. This guide is not intended to include complete descriptions of the finite element method nor its theoretical basis and formulation.
Keywordsfinite element analysis; FEA; computational simulation; orthopaedic implants; stress; strain; displacement; fatigue loading; model verification; model validation; model calibration; solution sensitivity
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as F2996-2013 and Pending Publication