Damage Characteristics & Residual Compression Strength of CFRP Laminates manufactured using VERITy Subjected to Low Velocity Impact

Viswamurthy , SR and Stanley , C Salem and Kotresh, Gaddikeri M and Ramesh, Sundaram (2012) Damage Characteristics & Residual Compression Strength of CFRP Laminates manufactured using VERITy Subjected to Low Velocity Impact. Technical Report. CSIR-NAL, Bangalore.

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Abstract

Composite materials are widely used in aerospace structures mainly due to their high specific strength and stiffness, coupled with increased durability and lower maintenance costs. Most primary composite aero structures use prepreg based autoclave moulded Carbon epoxy composites. Advanced Composites Division of CSIR-NAL has developed and patented a resin infusion technique called Vacuum Enhanced Resin Infusion Technology (VERITy) for the development of co-cured wing for the SARAS-PT3 aircraft using Carbon fabric and Epoxy resin. Carbon based laminated composites, are generally known to be vulnerable to impact damages such as tool drop. Damage due to low velocity impact on laminated composites can be dangerous since they can lead to significant reduction in strength even when it is barely visible to naked eye. Post-impact tests such as compression-after-impact or tension-after-impact have been used to study the degradation in strength and quantify the effect of impact damage. This report presents the damage characteristics and residual compression strength of Carbon epoxy laminates processed using VERITy and subjected to low velocity impact under room temperature ambient (RTA) condition. Carbon UD Fabric G 0827 BB1040 HP03 1F manufactured by Ms. Hexcel Composites is used as the reinforcement. The resin system is Epolam 2063 supplied by M/s. Axson. Dent depth, damage area and post-impact residual compression strength are measured for laminates of various thicknesses and impact energies.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Composites, Low velocity impact, BVID, Dent depth, Damage area, Residual strength
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
ENGINEERING > Structural Mechanics
Depositing User: Dr. Viswamurthy S R
Date Deposited: 25 Sep 2012 04:31
Last Modified: 09 Oct 2015 06:11
URI: http://nal-ir.nal.res.in/id/eprint/10873

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