Two Interesting Examples of Mesh Glueing

The mesh glueing feature in ADINA is a practical and powerful technique suitable for many types of analyses. It was introduced in ADINA 8.3 and has been extensively used. The feature was already described in a previous News, in which we focused on the use of a fine mesh in a certain region and successively coarser meshes elsewhere (as used, for example, in a multi-scale analysis).

In this News we show results obtained in two different glueing examples. The first involves a mechanical arm that is given an initial impact moment load causing it to rotate freely, as shown in the movie. The arm is made up of several components glued together as shown in the above figure. Each component is meshed separately causing all glued surfaces to have non-matching meshes. A dynamic analysis is performed with large deformations. The time integration scheme published by Bathe, see ref. below, and available in ADINA is used for conservation of energy (see graph below). As well known, the Newmark method is not suitable for the dynamic analysis of large deformation problems with long time durations, see reference.

The second example is an industrial application and we show some results below.

Reference

K.J. Bathe, Conserving Energy and Momentum in Nonlinear Dynamics: A Simple Implicit Time Integration Scheme. Computers and Structures, in press.