ALSIM Merge

Overview

Autonomous Meshing

Autonomous cars already exist, so why should anybody these days spend manual time on mesh preparation? This is a task for a machine. Software MERGE is a one-click way to prepare the mesh for multi-bodies or complex topological objects for 3D printing. The underlying software is already in use for paint shop applications: here it prepares a body in white starting from a CAD geometry fully automatically with 5-8 hours computational time on a desktop machine while requiring less than 15 minutes of manual work. As an input, tessellated data can be imported from several sources including automatic interfaces. This allows extraction of the data of multi-bodies from CAD. However, these data are often defective and not manifold. In addition, the describing surface is not represented in an exact way. The only exact information one can rely on at this stage is the position of the vertices of the mesh: they are located directly on the surface. The edges and areas of the triangles may deviate from the original surface. Thus, the vertices are kept and the rest is dismissed or enhanced if necessary. The underlying software uses several techniques to repair, connect and maintain the surface geometry by not only keeping the boundary representation exact but even by enhancing its quality. A volumetric (tetrahedral, hexahedral or hybrid) mesh is then automatically and efficiently constructed from the repaired surface mesh if required.

Download the paper, which reveals the techniques enabling the above-described functionalities here.

One Click: Multipart CAD to 3D Mesh

The manual or semi-automatic preparation of triangular and tetrahedral meshes for simulations is a very time-consuming task. The mesh preprocessing software MERGE masters this task fully automatically and in a considerably shorter timeframe. It takes CAD or STL data as input, repairs invalid meshes and connects them together. The small gaps between the input objects are automatically closed and even glancing intersections can be cut off. The output can be supplied in different variations, either as a mesh that minimizes the number of elements, as a mesh consisting of high-quality surface triangles, or as a conforming tetrahedral mesh. All are possibilities that are suitable for CFD or CAE simulations. Connecting the meshes of an entire car body can be done in (as little as) a few hours and does not require any manual work.

Download the paper, which reveals the techniques enabling the above-described functionalities here.

Automatic CAD Data Preparation for CAE

Simulations need high-quality mesh representations as input which are often manually prepared. The fully automatic mesh preprocessor software MERGE avoids this time-consuming task. The software CAD or STL data as input repairs invalid meshes and merges the input objects together. Small gaps between the input objects are automatically closed. The output surface mesh can be supplied in two different methods, either as a mesh that minimizes the number of elements or as a mesh consisting of high-quality triangles, ready for 3D meshing. A closed and connected surface mesh of an entire car body can be prepared overnight in a fully automatic manner.

Download the paper, which reveals the techniques enabling the above-described functionalities here.