Tensile specimen with a central hole

[vivelakorea]

Hi. Please forgive me for too many issues.

So I'm trying to make a tinsile test for a dog-bone specimen with centeral hole. Result was like this.

Problem is that in real situation, most of strain is localized on center hole part of the neck. This is true in Abaqus as well. But the result shows that strain is only in top elements.

Could you tell me what is wrong in my file? I attatched my file - warp3d.inp, coordinates.inp, incidences.inp, get_output.inp below. (github issue doesn't support .inp file, so I uploaded it by text file)

Thanks.

warp3d.txt coordinates.txt incidences.txt get_output.txt

[rhdodds]

Hello,

try this input file for a quasi-static solution.

For similar example with high-rate loading, please study /verification/test78

Prof. Dodds

! structure CH ! ! TODO: get viscous exponent m_power, yield stress yld_pt, ! reference strain rate ref_eps, ... material aluminium properties mises e 70000 nu 0.3, yld_pt 385 tan_e 203 rho 0 ! number of nodes 16887 elements 14688

elements 1-14688 type l3disop nonlinear material aluminium, bbar order 2x2x2

input from file 'coordinates.txt' input from file 'incidences.txt'

blocking automatic

constraints plane x=0 symmetry plane y=0 symmetry plane z=1.44000006 symmetry plane y=20. v 1 ! output patran neutral "neutral.out" output model flat patran convention text file "model.text"

loading pull nonlinear step 1-100 constraints 0.01

! nonlinear analysis parameters solution technique sparse direct time step 1.0e06 maximum iterations 10 $ global Newton iterations minimum iterations 2 extrapolate on convergence test norm res tol 0.01 line search on divergence check on nonconvergent solutions stop adaptive on $ global Newton iterations batch messages off wall time limit off material messages off bbar stabilization factor 0.0 consistent q-matrix off trace solution on display tied mesh mpcs off user_routine off

! output commands use "get_output.txt" steps 1-1000 ! compute displacements for loading pull, step 100 stop

On Feb 2, 2022, at 10:10 PM, 심규장 Gyujang Sim @.***> wrote:

Hi. Please forgive me for too many issues.

So I'm trying to make a tinsile test for a dog-bone specimen with centeral hole. Result was like this.

https://user-images.githubusercontent.com/40027828/152283885-6060b1cc-2bd4-4558-8deb-b26d945a632b.png Problem is that in real situation, most of strain is localized on center hole part of the neck. This is true in Abaqus as well. But the result shows that strain is only in top elements.

Could you tell me what is wrong in my file? I attatched my file - warp3d.inp, coordinates.inp, incidences.inp, get_output.inp below. (github issue doesn't support .inp file, so I uploaded it by text file)

Thanks.

warp3d.txt https://github.com/rhdodds/warp3d/files/7991951/warp3d.txt coordinates.txt https://github.com/rhdodds/warp3d/files/7991954/coordinates.txt incidences.txt https://github.com/rhdodds/warp3d/files/7991950/incidences.txt get_output.txt https://github.com/rhdodds/warp3d/files/7991944/get_output.txt — Reply to this email directly, view it on GitHub https://github.com/rhdodds/warp3d/issues/15, or unsubscribe https://github.com/notifications/unsubscribe-auth/AC7CB7W2Q3MPUV7KET4MUXDUZIE5NANCNFSM5NN5QEVA. Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub. You are receiving this because you are subscribed to this thread.

[vivelakorea]

Thank you for your kind answer.