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Title	Coupling of smooth particle hydrodynamics with PRONTO
Creator/Author	Attaway, S.W. ; Heinstein, M.W. ; Mello, F.J. ; Swegle, J.W.
Publication Date	1993 Aug 01
OSTI Identifier	OSTI ID: 10183971; Legacy ID: DE93019080
Report Number(s)	SAND--93-1781C; CONF-931121--17
DOE Contract Number	AC04-76DP00789
Other Number(s)	Other: ON: DE93019080
Resource Type	Conference
Specific Type	Technical Report
Resource Relation	Conference: Annual winter meeting of the American Society of Mechanical Engineers,New Orleans, LA (United States),28 Nov - 3 Dec 1993; Other Information: PBD: [1993]
Research Org	Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org	USDOE, Washington, DC (United States)
Subject	71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; 36 MATERIALS SCIENCE; HYDRODYNAMICS; P CODES; ALGORITHMS; FINITE ELEMENT METHOD; LAGRANGIAN FUNCTION; ANALYTICAL SOLUTION; FRACTURES; MATHEMATICAL MODELS; SHEAR; STRAIN RATE
Description/Abstract	A gridless numerical technique called smooth particle hydrodynamics (SPH) has been coupled to the transient dynamics finite element code, PRONTO. In this paper, a new weighted residual derivation for the SPH method will be presented, and the methods used to embed SPH within PRONTO will be outlined. Example SPH-PRONTO calculations will also be presented. One major difficulty associated with the Lagrangian finite element method is modeling materials with no shear strength; for example, gases, fluids and explosive bi-products. Typically these materials can be modeled for only a short time with a Lagrangian finite element code. Large distortions cause tangling of the mesh, which will eventually lead to numerical difficulties such as negative element area or ``bow tie`` elements. Remeshing will allow the problem to continue for a short while, but the large distortions can prevent a complete analysis. Smooth particle hydrodynamics is a gridless Lagrangian technique. Requiring no mesh, SPH has the potential to model material fracture, large shear flows, and penetration. SPH computes the strain rate and the stress divergence based on the nearest neighbors of a particle, which are determined using an efficient particle sorting technique. Embedding the SPH method within PRONTO allows part of the problem to be modeled with quadrilateral finite elements while other parts are modeled with the gridless SPH method. SPH elements are coupled to the quadrilateral elements through a contact like algorithm.
Country of Publication	United States
Language	English
Format	Size: 12 p.
Availability	OSTI; NTIS; GPO Dep. To purchase this media from NTIS, click here
System Entry Date	2006 May 22
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