The cyclic-fatigue behaviour of an epoxy polymer modified with micron-rubber and nano-silica particles
- 340 Downloads
Fibre-reinforced plastic (FRP) composites are widely used in ship hull, airframe and wind turbine structural applications where they are subjected to various types of constant and variable amplitude cyclic-fatigue loads. Hence, fatigue-durability is one of the important requirements for such composite materials. These FRPs, generally, contain continuous fibres of carbon or glass reinforced in a thermosetting epoxy-polymer matrix. The epoxy polymers are amorphous and highly cross-linked materials, because of which they have many useful structural properties such as a high modulus and failure strength, good creep resistance, good thermal properties, etc. However, they are relatively brittle and have poor resistance to crack initiation and growth. This, in turn, may adversely affect the overall performance of the FRPs under static and cyclic-fatigue loads.
The addition of micron-rubber and nano-silica particles in the epoxy polymer has been shown to impart significant...
KeywordsFatigue Life Void Growth Neat Epoxy Epoxy Polymer Fatigue Crack Propagation Rate
Dr. CM Manjunatha wishes to thank and acknowledge the UK-India Education and Research Initiative (UKIERI) for awarding the Research Fellowship and Dr. AR Upadhya, Director, National Aerospace Laboratories, Bangalore, India for permitting him to accept the Fellowship. Mr. J Sohn Lee is thanked for his assistance with the FEG-SEM work.
- 8.American Society for Testing and Materials (2003) Standard test method for tensile properties of plastics, ASTM D638-01, Annual book of ASTM Standards, vol 8.02. American Society for Testing and Materials, PAGoogle Scholar
- 14.Case SW, Reifsnider KL (2003) In: Milne I, Ritchie RO, Karihaloo B (eds) Comprehensive structural integrity, vol 4, cyclic loading and fatigue, 1st edn. Elsevier Science, Amsterdam, p 405Google Scholar
- 15.Talreja R (1987) Fatigue of composite materials. Technomic, Lancaster, PA, USAGoogle Scholar