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Using VGETVRM to compute strain in VUSDFLD ( abaqus explicit subroutine)

hi everybody.
I've used vgetvrm in vusdfld to calculate strain.
I have two question.


1- what's the differences between tensor strain and engineering strain?
I read user subroutine manual and it says"The shear strain components returned from utility subroutine VGETVRM are tensor components and not engineering components."


2-I want to calculate PE11 and PE22 with vgetvrm. but my results are strange.for example PE11 change between -11.14033 and 75.25797.
and PE22 change between -1.5974975E-04 and 4.7500171E-03


.while PE11 should be between -0.1 and 0.9
PE22 should be between -1.273 and 0.1


Thanks in advance.
good luck.

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