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Progressive Failure Analysis Methodology for Laminated Composite StructuresA progressive failure analysis method has been developed for predicting the failure of laminated composite structures under geometrically nonlinear deformations. The progressive failure analysis uses C(exp 1) shell elements based on classical lamination theory to calculate the in-plane stresses. Several failure criteria, including the maximum strain criterion, Hashin's criterion, and Christensen's criterion, are used to predict the failure mechanisms and several options are available to degrade the material properties after failures. The progressive failure analysis method is implemented in the COMET finite element analysis code and can predict the damage and response of laminated composite structures from initial loading to final failure. The different failure criteria and material degradation methods are compared and assessed by performing analyses of several laminated composite structures. Results from the progressive failure method indicate good correlation with the existing test data except in structural applications where interlaminar stresses are important which may cause failure mechanisms such as debonding or delaminations.
Document ID
19990052628
Acquisition Source
Langley Research Center
Document Type
Technical Publication (TP)
Authors
Sleight, David W.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1999
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.60:209107
NASA/TP-1999-209107
L-17660
Funding Number(s)
PROJECT: RTOP 538-13-12-04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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