Comments on: How are fatigue failures in composite materials repaired? http://www.andersoncompositesquadron.org/composite-materials/how-are-fatigue-failures-in-composite-materials-repaired/ Sat, 19 May 2012 06:05:59 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: JetDoc http://www.andersoncompositesquadron.org/composite-materials/how-are-fatigue-failures-in-composite-materials-repaired/#comment-1474 JetDoc Thu, 18 Mar 2010 02:25:59 +0000 http://www.andersoncompositesquadron.org/composite-materials/how-are-fatigue-failures-in-composite-materials-repaired#comment-1474 Repairs to structural components of an aircraft must be designed, engineered and approved by the manufacturer on an individual basis. Non-structural components must be repaired in accordance with the manufacturer's maintenance and repair manuals, or AC 43-13, 'Acceptable Methods, Techniques, and Practices: Aircraft Inspection and Repair'.<br><b>References : </b><br> Repairs to structural components of an aircraft must be designed, engineered and approved by the manufacturer on an individual basis. Non-structural components must be repaired in accordance with the manufacturer’s maintenance and repair manuals, or AC 43-13, ‘Acceptable Methods, Techniques, and Practices: Aircraft Inspection and Repair’.
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]]> By: Jimmbbo http://www.andersoncompositesquadron.org/composite-materials/how-are-fatigue-failures-in-composite-materials-repaired/#comment-1473 Jimmbbo Thu, 18 Mar 2010 02:00:59 +0000 http://www.andersoncompositesquadron.org/composite-materials/how-are-fatigue-failures-in-composite-materials-repaired#comment-1473 Am no expert in composite structures, but do know that carbon fiber components are nearly fatigue proof, and do not experience fatigue damage as do metal structures. The composites have long threads to bear the loads, and respond well to cyclical loading while metals have a crystalline structure, and the borders of the crystals provide locations for material failure with cyclical loading. The bigger issue with composites is hidden damage due to impact causing invisible breakage of fibers below the surface. Fiberglass is a composite and repairs in fiberglass components are easily completed, but carbon fibers require elevated temperatures and vacuum bagging for maximum structural integrity.<br><b>References : </b><br> Am no expert in composite structures, but do know that carbon fiber components are nearly fatigue proof, and do not experience fatigue damage as do metal structures. The composites have long threads to bear the loads, and respond well to cyclical loading while metals have a crystalline structure, and the borders of the crystals provide locations for material failure with cyclical loading.

The bigger issue with composites is hidden damage due to impact causing invisible breakage of fibers below the surface.

Fiberglass is a composite and repairs in fiberglass components are easily completed, but carbon fibers require elevated temperatures and vacuum bagging for maximum structural integrity.
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