模拟复合材料单纤维顶出实验,整个分析分为两步:第一步压头加载过程,用cohesive element模拟界面脱粘分离,已经实现,结果如图(加载结果);第二步压头卸载过程,其中界面部分脱粘(界面脱粘部分用接触条件替代,模型发生改变不能用重启动分析),将前面模拟得到的结果用import功能导入作为第二模型的initial state,卸载模型中设置卸载步step1,结果不收敛。大神别匿了!求指教!
在message出现如下信息:1、MAX. PENETRATION ERROR -1.64362E-03 AT NODE PART-1-1.5 OF CONTACT PAIR
(ASSEMBLY_SURF-6,ASSEMBLY_SURF-5)
MAX. CONTACT FORCE ERROR -2.18037 AT NODE PART-1-1.1712 OF CONTACT PAIR
(ASSEMBLY_SURF-6,ASSEMBLY_SURF-5)
PENETRATION ERROR TOO LARGE COMPARED TO DISPLACEMENT INCREMENT.
2、AVERAGE FORCE 1.151E-03 TIME AVG. FORCE 1.151E-03
LARGEST RESIDUAL FORCE -1.422E-03 AT NODE 1722 DOF 1
INSTANCE: PART-1-1
LARGEST INCREMENT OF DISP. 1.644E-03 AT NODE 1 DOF 2
INSTANCE: PART-4-1
LARGEST CORRECTION TO DISP. 1.644E-03 AT NODE 1 DOF 2
INSTANCE: PART-4-1
FORCE EQUILIBRIUM NOT ACHIEVED WITHIN TOLERANCE.
3、***WARNING: THE SYSTEM MATRIX HAS 6 NEGATIVE EIGENVALUES.
EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
ELEMENT PART-1-1.3345 IS DISTORTING EXCESSIVELY.
ELEMENT PART-1-1.3345 IS DISTORTING EXCESSIVELY.
ELEMENT PART-1-1.8585 IS DISTORTING EXCESSIVELY.
ELEMENT PART-1-1.9100 IS DISTORTING EXCESSIVELY.