Automatic Pre-Mesh CAD Data Repairing

Automatic pre-mesh CAD data repairing

Computer aided design (CAD) models are the starting point for many downstream applications such as mesh generation, structural/fluid/thermal analysis, rapid prototyping, numerical controlled machining, casting, computer graphics. Each of these downstream applications are strongly dependent on the accuracy and consistency of the input geometry, but due to numerical problems, imprecise design, so...

Aspects of Automatic CAD Model Pre-Processing and Access in Mesh Generation

This paper addresses the problem of CAD geometric model pre-processing, also known as CAD repair and the problems of the CAD model accessibility by downstream applications. Methods, invariant from the specific software implementation and algorithms of the CAD repair for Finite Element type applications are given. Problems of the CAD model direct and indirect interfaces to applications, based on...

Automatic Recognition of Features from Cad Models for Mesh Generation

Automatic recognition of features from CAD models is one of the key technologies for mesh generation. This paper studies the algorithm for automatic recognition of features from CAD models in STL data format. Firstly, a new STL data file with topological connection is constructed for the calculation. Secondly, the coplanar relationships among all the triangle facets are constructed initially. T...

Mesh Segmentation for Cad Applications

Segmentation of meshes has received a lot of attention in recent years, due to its growing number of applications. In this paper, we discuss properties that have been used in the literature to evaluate segmentation algorithms. Then, we describe some applications of segmentation in CAD. For each application, we review one of our segmentation algorithms that is suitable for the problem. We focus ...

A Generic CAD-Mesh Interface