NDLI: Interface finite elements for the analysis of fracture initiation and progression

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Interface finite elements for the analysis of fracture initiation and progression

Content Provider	NASA Technical Reports Server (NTRS)
Author	Johnson, Eric R. Ambur, Damodar R. Technical Monitor
Copyright Year	2003
Description	Progressive failure analyses (PFA) are important for the prediction of residual strength and damage tolerance of vehicle structures, and to predict the energy absorbing capability of vehicle structures under crash-type loads. Typically continuum damage mechanics (CDM) and fracture mechanics (FM) are the methods used for PFA. The method of interfacial damage mechanics (IDM) is used for PFA in this research. IDM has capabilities intermediate between CDM and FM, and is used to numerically model the initiation, growth, and arrest of cracks. IDM smooths the stress singularity at the crack tip, and is easily adaptable with other nonlinearties such as plasticity and material damage. IDM is implemented by user-defined interface elements in the ABAQUS/ Standard structural analysis software package. The structural components selected to demonstrate the effectiveness PFA using interface elements are, for the most part, those with published test data. These structural components were subjected to quasi-static loading in the tests. Thus, the ABAQUS analyses are used to predict geometrically and materially nonlinear equilibrium states. Impact loading, dynamic fracture, reflected stress waves, inertia, and time dependent material behavior are not considered.
File Size	414877
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030054520
Archival Resource Key	ark:/13960/t1hj1gh80
Language	English
Publisher Date	2003-06-02
Access Restriction	Open
Subject Keyword	Numerical Analysis Crack Tips Fracture Mechanics Direct Numerical Simulation Life Durability Performance Prediction Design Analysis Impact Tolerances Crack Propagation Failure Analysis Reliability Analysis Nonlinearity Applications Programs Computers Spacecraft Structures Fracture Strength Loads Forces Crack Initiation Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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