Abstract
In the existing HPM (Hybrid-type Penalty Method), independent rigid-body displacement, rotation, and the strain are set as the unknown parameter of the displacement field for each sub-domain. In this paper, we proposes the new displacement field which sets the stress as the unknown parameter instead of the strain as a displacement field of HPM. The simple numerical examples show that the accuracy of the solution obtained by this technique is the same as the displacement field which assumes the strain in the unknown parameter. The collapsing load calculated by this method is equivalent to RBSM in the material nonlinear analysis which used surface force using load incremental method.
