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登录若直接设通用接触,一开始就不收敛(有Displacement increment for contact is too big.的警告信息);若使用面面接触,同样不收敛(Displacement increment for contact is too big.);若使用面面接触,并设置调整过盈,则开始计算时会直接将上板向上调整9mm至与模具接触。
基于COHESIVE做水力压裂时,在地应力平衡分析步时,用fixed时说Fixed time increment is too large。程序直接报错。另一模型中的第一步也是fixed但未报错,两个模型的初始应力,孔隙压力,材料属性一模一样,为什么第一步地应力平衡会出现这样的问题呢?求指教Job-COH3.zip
Too many attempts made for this increment。(这个是报错程序)下面的是出现的警告Displacement increment for contact is too big.
2.对分析主要对象添加塑性参数后,提交计算出现too many attempts made for this increment,1u-5u),查看MSG文件,有多个numerical singularity。 3.尝试了很多办法,包括修改初始增量步,最小增量步,提高Ia到10,接触主从面互换,重新设置接触,都不行。
Too many attempts made for this increment Abaqus/Standard Analysis exited with an error - Please see the message file for possible error messages if the file exists.

FOR P=0.0 0.100 CONTACT FORCE ERROR TOLERANCE FOR CONVERT SDI=YES 1.00 DISPLACEMENT COMPATIBILITY TOLERANCE FOR DCOUP ELEMENTS 1.000E-05

It is likely that either a displacement boundary condition has been applied directly onto a constraint equation or two or more constraint equations share too many degrees of freedom. ”查找节点ID号后发现有几个是弹簧选择的面上的节点
以下是status文件相关信息***WARNING: Master surface ASSEMBLY_SURF-CU-3 of contact pair # 5 contains facets with out-of-plane warping of at least 20.000 degrees in increment 22480.

要不出现这个Time increment required is less than the minimum specified要不出现这个Too many attempts made for this increment到底怎么调节分析步合适?
;The strain increment is so large that the program will not attempt the plasticity calculation at 27 points 报错信息:Too many attempts made for this increment
OP=NEW on *CONTACT is ignored when the general contact definition is specified as model data.

All output requests have been written for the last converged increment. Too many attempts made for this increment”请为各位前辈,问题出到哪里了?

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