Publication:
Battle Damage Assessment Using Finite Element Analysis and Repair Techniques Using Composite Patches

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Authors
Smith, Lawrence Robert
Subjects
Ballistic
Damage
Assessment
Repair
Finite Element Analysis
Composite
Patch
Adhesive Bond
Structure
Skin
Helicopter
Logistics
Combat
SKABPATCH
Advisors
Kolar, Ramesh
Date of Issue
1988-12
Date
December 1988
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Analytical and experimental results are discussed for the composite patch to thin aerospace aluminum skin structure problem. Field level battle damage assessment and repair application concerns/limitations were integrated into the study. A discussion of battle damage assessment and available repair methodologies is presented along with a discussion of applicable finite element models and structural analysis predictions. Significant stress concentration reductions were realized (analytically and experimentally). The effectiveness of adhesively bonding a composite repair patch over small caliber ballistic damage to helicopter skin was demonstrated. Structural continuity was restored via a structural adhesive bridge into a precured, quasi-isotropic graphite/epoxy repair patch. Field level implementation of the SKABPATCH (Smith-Kolar Adhesively Bonded Patch) repair tactic is considered to be feasible from both an engineering perspective and for its logistical simplicity.
Type
Thesis
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Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted.
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