I was wounding what really happed when the material is flaged as Deleted by setting the controlling SDSV as 0 in the VUMAT. The manual says that the deleted material point is not actually deleted from the block, but system will pass zero stress and stain increments for deleted material points. So, instead of setting the controlling SDSV as 0 to explicitly "delete" the material at failure, I set zero stressNew and strainInc for them in the VUMAT. But, the simulation result are quite different.Looks that the reaction force are 10 times larger. Can anyone please explain this?