The use of curve wizard method for generating rough surface in CAD model and data transferring analysis in CAE model

Abstract

The contacting surfaces in the biomedical implants, e.g. artificial hip and knee impants, have a rough surface in the micro scale. The computational modelling of the contacting surface between implants with respect to the rough surfaces require are conducted using finite element modelling in CAE software. The rough surface of the contacting components can be modelled as a homogeneous rough surface which derived from equation in Matlab. Then the rough surface is exported to CAD and CAE model. A geometrical deviation can be appear during data transfer in the CAD and CAE model. This paper aims to study the geometrical analysis of the data transfer from mathematical models in Matlab to CAD models in SolidWorks and CAE models in ABAQUS software. In the CAD model, especially in SolidWorks, the rough surface generation process, which is imported from other file format, can be performed in 3 modes: automatic creation method, guided creation method and curve wizard method. The geometrical analysis is conducted on a sinusoidal rough surface model, especially at the peak of height, the valley depth, and the rough surface wavelength with respects to the three types of surface generation method. The result show that homogeneous rough surface successfully transferred to CAD model and CAE model using curve wizard method with the highest geometrical accuracy. The deviation in this method is less than 1 percent on average on 4 locations on the sinusoidal rough surface model. In the automatic creation method, and the guided creation method, the resulted rough surface is less acurate which is indicated by the higher geometrical deviation.