ABAQUS单元选用标准

Table 1 ABAQUS Elements Selection Criteria

General contact between deformable bodies

变形体间的普通接触

First-order quad/hex

linear一阶四边形/三角形单元

Second-order quad/hex

quadratic二阶四边形/三角形

Contact with bending

弯曲接触Incompatible mode

非协调模式

First-order fully integrated quad/hex

or second-order quad/hex一阶全积分

或二阶四边形/三角形

Bending (no contact) 非接触弯曲Second-order quad/hex

二阶四边形/三角形单元

First-order fully integrated quad/hex

一阶全积分四边形/三角形

Stress concentration

集中应力Second-order

二阶

First-order

一阶

Nearly incompressible (ν=k/(k+1)>0.475 or large strain plasticity εpl>10%) 近不可压缩刚体First-order elements or second-order

reduced-integration elements

一阶全积分单元或二阶缩减单元

Second-order fully integrated

Completely incompressible (rubberν= 0.5)

完全，不可压缩刚体

Hybrid quad/hex, first-order if large

deformations are anticipated

一阶四边形/三角形混合单元(Quad-dominated)

Bulk metal forming (high mesh distortion) (金属)体积成型(网格畸变) First-order reduced-integration quad/hex

一阶四边形/三角形缩减单元

Second-order quad/hex

Complicated model geometry (linear material,

no contact)

(线性材料无接触) Second-order quad/hex if possible (if not overly distorted) or second-order tet/tri (because of

meshing difficulties)

Complicated model geometry (nonlinear problem or contact) First-order quad/hex if possible (if not overly distorted) or modified second-order tet/tri (because of meshing difficulties)

Natural frequency (linear

dynamics)

Second-order

Nonlinear dynamic (impact) 非线性动力冲击

First-order

linear一阶四边形/三角形

Second-order