Overview of Contacts in LS-DYNA

Overview

In general, modeling contact in LS-DYNA is straightforward for many users and the typical contact definitions that are discussed in the introductory class to LS-DYNA perfectly suits their needs. But for expert users, LS-DYNA offers extensive possibilities to enhance contact modelling in their applications. In particular, LS-DYNA has more than 70 different contact types, and each type supports numerous options and special settings. While this generous selection guarantees extreme flexibility for the contact definition, it also requires a great deal of knowledge on the user's side to make proper use of it.

This class provides you with a summary of the possibilities and limits of frequently used contact definitions and their options when modeling contact in LS-DYNA. It focuses on a selection of suitable contact types for crash and impact dominated problems. Contact definitions used in manufacturing will be briefly mentioned but the interested user is referred to the specialized classes on these topics. During the class, workshop examples aid in explaining the effects of the discussed contact types and options on the simulation results.

Learning Outcome

  • Understanding of all contact types in LS-DYNA
  • Understanding numerical treatment of contact to help diagnose contact problems
  • Overview of contact stiffness calculations
  • Initial penetrations and how to handle them in large models
  • Understanding of TIED/TIEBREAK and Penalty Tied Contacts

Prerequisites

  • You should have ba­sic knowl­edge of LS-DY­NA.

Target Audience: Structural engineers simulating contact-impact problems from low-to-medium velocity or blast applications

Teaching Method: Lectures and computer practical sessions to validate acquired knowledge.

Learning Options: Training materials for this course are available with a Ansys Learning Hub Subscription. If there is no active public schedule available, private training can be arranged. Please contact us.

 

Agenda SUBSCRIBE TODAY  

Topics Covered :

  1. Classification of contact types in LS-DYNA
    1. Node-to-segment versus segment-to-segment treatment
    2. One-way versus two-way and single-surface treatment
    3. Beam contact
    4. Automatic contact
  2. Penalty versus constraint treatment
  3. Contact thickness
  4. Definition of a contact keyword and available options
    1. Mandatory cards one to three
    2. Optional cards A to F
  5. Tied contacts
  6. Performance, scalability, & MPP options
  7. Some remarks on robustness
  8. Troubleshooting
  9. Current developments in LS-DYNA
  10. Best practice for various applications
  11. Summary

Agenda :

This is a 1-day classroom course covering both lectures and workshops. For virtual training, this course is covered over 4 x 2-hour sessions lectures only.

Virtual Classroom Session 1 / Live Classroom Day 1

  • Session1: Introduction and Time Integration
  • Module 1 – Introduction
  • Module 2 – Time Integration

Virtual Classroom Session 2 / Live Classroom Day 1

  • Session2: Numerical Treatment of Contact
  • Module 3 – Numerical Treatment of Contact

Virtual Classroom Session 3/ Live Classroom Day 1

  • Session3: Tied and Tie-Break Contact
  • Module 4 -Tied and Tue-Break Contact

Virtual Classroom Session 4 / Live Classroom Day 1

  • Session4: FSI Contacts and General Use Guidelines.
  • Module 5 - FSI Contacts
  • Module 6 – General User Guidelines
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