摘要
The incompatible elements presented in Ref. [1] are usually called Wilson’s incompatible elements. If we apply the elements to cantilever beam test problem, numerical results will be in agreement exactly with theory solution only when the element shape is regular (rectangular or right hexahedral). If the element shape is irregular, then the accuracy and convergence is no longer held. Various improvement elements have been presented for ten years. Unfortunately, the exact solution of the test problem is never achieved by these improvement elements for irregular elements.
