problem with Stress

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mohammmad
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problem with Stress

Post by mohammmad » Thu Oct 11, 2018 1:25 am

Hi all,
I have an 2ِD element that in each section of the element there are three component: strainXX, strainYY, and strainXY. I use ND material, first plain-strain J2 Plasticity Material for steel section and second plain-strain Drucker Prager Material.
Because of the specific cross - section conditions, I set the variable (strainYY) in such a way that stressYY is 0.0. In order to set stressYY=0.0, I got the tangent stiffness matrix(getTangent) of the material each time and did this:

see th picture :
[URL=http://uupload.ir/view/kt8u_capture2.png][IMG]http://uupload.ir/files/kt8u_capture2_thumb.png[/IMG][/URL]
http://uupload.ir/files/kt8u_capture2.png
Code:
const Matrix& newK = theMat->getTangent();
strain(1) = -((strain(0)*newK(1, 0) + strain(2)*newK(1, 2)) / (newK(1, 1)));


But, the problem is when I set this new strain vector with "theMat->setTrialStrain(strain);" and after that, I call "theMat->getStress();", in the resultant stress vector stressYY (in vector is stress(1)) is not zero.
why?



leonardofarid
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Re: problem with Stress

Post by leonardofarid » Sun Jan 20, 2019 2:10 pm

کلیه موارد و راه و روش های متنوع سبک زندگی درست در سایت آگاه باشیم.

peterlee
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Re: problem with Stress

Post by peterlee » Tue Jan 29, 2019 10:06 pm

Thanks for the explanation.

energynovin
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Re: problem with Stress

Post by energynovin » Tue Oct 22, 2019 8:58 am

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anasmith
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Re: problem with Stress

Post by anasmith » Thu Nov 14, 2019 11:57 pm

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applesp
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Re: problem with Stress

Post by applesp » Sun Nov 24, 2019 5:49 pm

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Georgetech
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Re: problem with Stress

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Re: problem with Stress

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Re: problem with Stress

Post by shrutib » Tue May 11, 2021 9:02 pm

Stress testing's objective is to check the system under extreme conditions. It monitors system resources such as Memory, processor, network etc., and checks the ability of the system to recover back to normal status. It checks whether the system displays appropriate error messages while under stress.
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