Onsert strength design

The onsert is a joining element to achieve load introduction into lightweight structures typical for the transportation sectors. The onsert is simply bonded to the surface of the otherwise unharmed substrate. Thus, and in contrast to other joining technologies such as inserting, riveting, or bolting, the onsert technology avoids weakening of the structure. The present study investigates the use of shape optimization to identify a maximum-strength onsert design. Results obtained from experiments validate numerical predictions of design and strength increase. The onsert design parameterization, analysis models, and minimization algorithms are explained.