负体积问题
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The LS-DYNA time step size should not exceed 0.519E-04
to avoid contact instabilities. If the step size is
bigger then scale the penalty of the offending surface.
0 t 0.0000E+00 dt 0.00E+00 flush i/o buffers
1 t 0.0000E+00 dt 2.17E-05 flush i/o buffers
1 t 0.0000E+00 dt 2.17E-05 write d3plot file
26 t 4.9686E-04 dt 1.62E-05 write d3plot file
*** Error negative volume in brick element # 27056 cycle 63
******** minimum time step size reached *********
On a restart minimum timestep will be 0.000E+00
63 t 7.9341E-04 dt-1.17E-04 write d3plot file
E r r o r t e r m i n a t i o n
这是messag中提示的错误，我知道是负体积问题，但由于是初学，不知道怎么办解决，求大神指点，望详细指导，万分感谢
to avoid contact instabilities. If the step size is
bigger then scale the penalty of the offending surface.
0 t 0.0000E+00 dt 0.00E+00 flush i/o buffers
1 t 0.0000E+00 dt 2.17E-05 flush i/o buffers
1 t 0.0000E+00 dt 2.17E-05 write d3plot file
26 t 4.9686E-04 dt 1.62E-05 write d3plot file
*** Error negative volume in brick element # 27056 cycle 63
******** minimum time step size reached *********
On a restart minimum timestep will be 0.000E+00
63 t 7.9341E-04 dt-1.17E-04 write d3plot file
E r r o r t e r m i n a t i o n
这是messag中提示的错误，我知道是负体积问题，但由于是初学，不知道怎么办解决，求大神指点，望详细指导，万分感谢
史爱民 
