通过修正常应变矩阵，确保单元通过分片检验。
To pass the patch test, the constant strain matrix is modified.
其次，基于CR列式法推导出了大旋转小应变空间杆单元及平面梁单元的内力矢量及切线刚度矩阵；
Then, based on the CR formulation, the internal force vector and tangent stiffness matrix of large rotation and small strain space bar and plane beam element are deduced.
精化杂交法可以使单元的应变能按假定的应变模式分解，由此得到相应的分解的单元刚度矩阵，而且常常可以推出显式。
By this way the element stiffness matrix can be decomposed into a series of matrices with respect to assumed strain modes.
理论上采用大挠度的应变——位移关系，建立了圆柱壳单元的弹性刚度矩阵和几何刚度矩阵。
The elastic stiffness matrix and the geometrical stiffness matrix for a element of cylindrical shells been established by the relation ship of strain displacement in a lange deflection.
进一步推导了应变和应力以及单元的刚度矩阵等，最后通过具体实例验证了高阶四边形流形单元的计算应力和应变的准确性。
The calculation results, with an example shown, demonstrate that high order rectangular element of manifold method can get more accurate strain and stress.
进一步推导了应变和应力以及单元的刚度矩阵等，最后通过具体实例验证了高阶四边形流形单元的计算应力和应变的准确性。
The calculation results, with an example shown, demonstrate that high order rectangular element of manifold method can get more accurate strain and stress.
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