The quadrilateral area coordinate is adopted instead of the isoparametric coordinate.
采用四边形面积坐标来代替等参坐标。
2
Several Authors have presented numerical results which demonstrated the stiffening of 8-node and 12-node quadrilateralisoparametric elements when distorted from a rectangular shape.
某些作者给出的数值结果表明，在单元形状不规则时，八节点和十二节点的四边形等参数单元的刚度变硬。
3
In this paper, the incompatible displacement functions are constructed which possess completeness in Cartesian coordinates. A pair plane quadrilateralisoparametric incompatible elements are given.