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Low velocity impact analysis with NASTRANA nonlinear elastic force-displacement relationship is used to calculate the transient impact force and local deformation at the point of contact between impactor and target. The nonlinear analysis and transfer function capabilities of NASTRAN are used to define a finite element model that behaves globally linearly elastic, and locally nonlinear elastic to model the local contact behavior. Results are presented for two different structures: a uniform cylindrical rod impacted longitudinally; and an orthotropic plate impacted transversely. Calculated impact force and transient structural response of the targets are shown to compare well with results measured in experimental tests.
Document ID
19900015331
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Trowbridge, Daniel A. (Analex Corp. Fairview Park, OH., United States)
Grady, Joseph E. (NASA Lewis Research Center Cleveland, OH, United States)
Aiello, Robert A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1990
Publication Information
Publication: COSMIC, 18th NASTRAN (R) Users' Colloquium
Subject Category
Structural Mechanics
Accession Number
90N24647
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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