A quadrilateral axisymmetric element with rotating degree of freedom at the vertex nodes is derived. For improving the precision of the element, decreasing the sensitivity of element geometry and applying it to nearly incompressible materials, three nonconforming displacement functions and a “bubble” function are selected as the intemal freedom of the element. The results of the numerical examples show that the performance of the new element is fine.
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任钧国,熊龙飞.带转动自由度的轴对称四边形单元[J].国防科技大学学报,2000,22(3):44-49. REN Junguo, XIONG Longfei. A Quadrilateral Axisymmetric Element with Rotating Degree of freedom[J]. Journal of National University of Defense Technology,2000,22(3):44-49.