Question on Implementing User-Defined Contact in LS-DYNA

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satish Paudel

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Dec 1, 2025, 2:12:55 PMDec 1

to LS-DYNA2

Hi,

I have a question regarding the procedure for implementing a user-defined tiebreak contact in LS-DYNA. Specifically, if someone has done this before, I would like to know how to link a Fortran subroutine (e.g., mortar_usrtbrk) to the corresponding contact card (image attached).

Thank you for your guidance.

Best Regards,

Dr. Satish Paudel

Associate Professional Specialist

Department of Civil and Environmental Engineering at Princeton University

Email: paudel...@gmail.com, sp4...@princeton.edu

Mobile: (775) 460-6498

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https://www.researchgate.net/profile/Satish-Paudel-5?ev=hdr_xprf

James Kennedy

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Dec 1, 2025, 5:47:39 PMDec 1

to satish Paudel, LS-DYNA2

Dear Satish,

See if the following is of some help”

Jonsson, A., “Guideline for User Defined Interfaces in Ansys LS-DYNA Software”, 2025.

https://lsdyna.ansys.com/wp-content/uploads/2025/09/Ansys_LS-DYNA_usermat_guideline_2025R1.pdf

Sincerely,

James M. Kennedy

KBS2 Inc.

December 1, 2025

From: ls-d...@googlegroups.com [mailto:ls-d...@googlegroups.com] On Behalf Of satish Paudel
Sent: Monday, December 01, 2025 1:13 PM
To: LS-DYNA2 <ls-d...@googlegroups.com>
Subject: [LS-DYNA2] Question on Implementing User-Defined Contact in LS-DYNA

Hi,

I have a question regarding the procedure for implementing a Ansys LS-DYNA user-defined 64 Ansys LS-DYNA user-defined 64 Ansys LS-DYNA user-defined 64 Ansys LS-DYNA user-defined 64 Ansys LS-DYNA user-defined 64. Specifically, if someone has done this before, I would like to know how to link a Fortran subroutine (e.g., mortar_usrtbrk) to the corresponding contact card (image attached).

Thank you for your guidance.

Best Regards,

Dr. Satish Paudel

Associate Professional Specialist

Department of Civil and Environmental Engineering at Princeton University

Email: paudel...@gmail.com, sp4...@princeton.edu

Mobile: (775) 460-6498

https://www.linkedin.com/feed/

https://www.researchgate.net/profile/Satish-Paudel-5?ev=hdr_xprf

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