Effect of Cyclic Loading Frequency on Flexural Modulus of GFRP Laminates with Resin Rich Intermediate Layers
- Resource Type
- Authors
- R. Krishna Murthy; Chandrasekaran Kesavan; T. G. Loganathan
- Source
- Applied Mechanics and Materials. 787:543-547
- Subject
- Materials science
Cantilever
Flexural strength
Leaf spring
business.industry
Flexural modulus
Three point flexural test
Damping factor
General Medicine
Structural engineering
Fibre-reinforced plastic
Composite laminates
business
- Language
- ISSN
- 1662-7482
The flexural modulus of composite laminates subjected to cyclic loads of varying cycle periods are experimentally investigated in this work. GFRP composite laminate specimen of configuration 0/R/0/0/0, 0/R/30/60/0, 0/R/90/90/0 and 0/R/45/-45/0 are prepared by hand lay-up technique with a uniquely processed resin-rich intermediate layer for the testing. Specimens are exposed to constant amplitude cyclic loading of frequencies 4.6 Hz and 8.6 Hz. A cantilever configuration of specimen with cyclic tip loading is considered to simulate the conditions of a leaf of a laminated automobile leaf spring. The flexural response of the laminate is measured using three point bend test as per ASTM D 790 and damping by hysteresis loop. The observed reduction in flexural modulusand the increase in damping factor after loading are compared with virgin. Minimised flexural modulus deviations between the loading frequencies are favoured by the cushioning of resin rich intermediate layer in the lay-up.