Accession Number:

AD0774255

Title:

Application of Nonlinear Analysis (Plastic) to NASTRAN using RING Elements Including Aspect Ratio Effect.

Descriptive Note:

Technical note,

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s):

• Yang,J. C. S.
• Frederick,Diana

Report Date:

1973-08-01

Pagination or Media Count:

91.0

Abstract:

NASA Structural Analysis NASTRAN Computer Program is a general purpose computer program developed by the National Aeronautics and Space Administration. In order to model cartridge case problems, three studies were performed to test the applicability of NASTRAN. Study 1 modified NASTRAN to perform a nonlinear analysis plastic and include RING elements. Study 2 demonstrated that large aspect ratios in RING elements can safely be ignored. Study 3 showed that varying element sizes within a model do not affect the deformations or stresses. Author

Descriptors:

• *Cartridge cases
• *Stresses
• *Plastic properties
• Structural properties
• Computer programs

Subject Categories:

• Computer Programming and Software
• Ammunition and Explosives
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE