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COMPOSITE DAMAGE REPAIR TECHNIQUE

IP.com Disclosure Number: IPCOM000243475D
Publication Date: 2015-Sep-24
Document File: 5 page(s) / 2M

Publishing Venue

The IP.com Prior Art Database

Abstract

This technique defines a method to repair a primary composite structures, in particular a method to repair a primary composite structures which need to maintain an aerodynamic surface.

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         COMPOSITE DAMAGE REPAIR TECHNIQUE TECHNICAL FIELD

This technique defines a method to repair a primary composite structures, in particular a method to repair a primary composite structures which need to maintain an aerodynamic surface.

PROBLEM TO BE SOLVED AND PRIOR ART

In existing techniques, it seems difficult to achieve both requirements structural capability and aerodynamic surface in a single repair technique. In some cases, it has been possible to achieve both; however, there has been large penalty to the weight. Additionally, repair due to plate bolting causes stress concentration due to bolt holes and large number of small dia. bolts are needed to spread loads slowly in a wider area.

BRIEF SUMMARY

This technique relates to a composite repair technique so that the loads can be introduced slowly in a composite laminate patch in a smaller area around the damage. Slow introduction of loads via a tapered feature reduces the stress concentration. Thus, it reduces the chance of dis-bond or peel off of the patch from the parent material. Additionally, introduction of PUF helps to achieve an aerodynamic surface at the outer skin/ layer.

DETAILED DESCRIPTION

Given below is step by step procedure to repair a structural damage by the proposed technique:


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1) Damage (through or part) in the laminate


2) Preparation of the damaged surface: countersunk hole preparation (for slow load introduction).


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3) Prepare core for aerodynamic surface requireme...