In this paper, essential boundary condition enforcement using multiple point constraints (MPC) technique is examined to analyze buckling/post-buckling problem of plates employing meshfree approach. In the buckling/post-buckling analysis, tying relations and periodical boundary conditions are adopted for assuming continuity and periodicity of the structures. Since the MPC technique is simple approach, it is then suitable for enforcing the boundary conditions. However, we found the MPC

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... cannot pass so-called patch test. The problem is examined on stress-level evaluation and plate buckling/post-bukling problem are solved in numerical examples.