A general-purpose contact detection algorithm for nonlinear structural analysis codes
A new contact detection algorithm has been developed to address difficulties associated with the numerical simulation of contact in nonlinear finite element structural analysis codes. Problems including accurate and efficient detection of contact for self-contacting surfaces, tearing and eroding surfaces, and multi-body impact are addressed. The proposed algorithm is portable between dynamic and quasi-static codes and can efficiently model contact between a variety of finite element types including shells, bricks, beams and particles. The algorithm is composed of (1) a location strategy that uses a global search to decide which slave nodes are in proximity to a master surface and (2) an accurate detailed contact check that uses the projected motions of both master surface and slave node. In this report, currently used contact detection algorithms and their associated difficulties are discussed. Then the proposed algorithm and how it addresses these problems is described. Finally, the capability of the new algorithm is illustrated with several example problems.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10175733
- Report Number(s):
- SAND-92-2141; ON: DE93018507; TRN: AHC29307%%31
- Resource Relation:
- Other Information: PBD: May 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MECHANICAL STRUCTURES
NONLINEAR PROBLEMS
ALGORITHMS
COMPUTERIZED SIMULATION
FINITE ELEMENT METHOD
ACCURACY
SURFACES
SHELLS
STRUCTURAL BEAMS
COMPUTER CODES
DETECTION
COMPUTER ARCHITECTURE
PARALLEL PROCESSING
DEFORMATION
SLIDING FRICTION
IMPACT SHOCK
420200
990200
FACILITIES, EQUIPMENT, AND TECHNIQUES
MATHEMATICS AND COMPUTERS