Total views : 289

Effect of Hygrothermal Loading on Laminate Composites

Affiliations

  • SMEC, VIT University, Vellore - 632014, Tamil Nadu, India
  • School of Mechanical Engineering, VIT University, Vellore - 632014, Tamil Nadu, India

Abstract


Objective: To find the effect of hygrothermal loading on CFRP and GFRP composite materials by finding the properties like capacitance, micro hardness, moisture diffusivity and area of fraction. Methods: Hand layup and vacuum bag methods were used for fabrication of composites. Finding: Three-point bending test was done on each specimen by varying load, i. e, zero load, with 30% load, 50% load and 70% load for different time periods. Micro hardness and capacitance were determined using Vickers Hardness tester and LCR meter respectively on both the composites before and after the thermal treatment. The capacitance increased with time whereas the percentage area of fraction of the fibre decreased. Also, the reduction in strength and damage to fibre were investigated using SEM. It was observed that with increase in %weight gain, micro hardness of specimen decreased. Application/Improvement: FRPs can substitute traditional steel reinforcements in reinforced concrete structures. The continuous loading under thermal actions due to natural environmental factors lead to degrading effect that needs to accurate investigations in evaluating durability of fibre reinforced polymers.

Keywords

Area of Fraction, Capacitance, Failure Modes, Hygrothermal Loading, Micro Hardness.

Full Text:

 |  (PDF views: 195)

References


  • Panigrahi SK, Pradhan B. The width delamination damage propagation characteristics in single lap laminated FRP composite joints. International Journal of Adhesion and Adhesives. 2009; 29(2):114–24.
  • Saito H, Kimpara I. Damage evolution behaviour of CFRP laminates under post impact fatigue with water absorption environment. Composites Science and Technology. 2009; 69(6):847–55.
  • Yashiro S, Ogil K. Fracture behavior in CFRP cross play laminates with initially cut fibres. Applied and Manufacturing. 2009 Oct; 77:75–86.
  • Shi X, Hinderliter BR, Croll SG. Environmental and time dependence of moisture transportation in an epoxy coating and its significance for accelerated weathering. Presented at the Coating Tech Conference Indianapolis. 2009; 7(4):419–30.
  • Higgins RMO, Mccarthy MA. Comparison of open hole tension characteristics of high strength glass and carbon fiber-Reinforced composite materials. Composite Science and Technology. 2008; 68(13):2770–8.
  • Aktas A, Uzun I. Sea water effect on pinned glass fiber composite materials. Composite Structures. 2008; 85:59–63.
  • Schambron T, Lowe A, Mcgregor HV. Effects of environmental ageing on the static and cyclic bending properties of braided carbon fiber /PEEK bone plates. Composites Part B, Engineering. 2008; 399(7–8):368–80.
  • Botelho EC, Pardini LC, Rezende MC. Hygrothermal effects on the shear properties of carbon fibre/epoxy composites. Journal of Materials Science. 2006; 41:7111–18.
  • Aiello MA, Ombre L. Environmental effects on the mechanical properties of glass-FRP and aramid-FRP rebar. Mechanics of Composites Material. 2000; 36:1–30.
  • Purslow D, Potter RT. The effect of environment on the compression strength of notched CFRP a fractographic investigation. Composites. 1984 Apr; 15(2):112–20.
  • Sereir Z, Adda-Bedia EA, Tounsi A. Effect of temperature on the hygrothermal behavior of unidirectional laminated plates with asymmetrical environmental conditions. Composite Structures. 2006 Mar; 72(3):383–92.
  • Alam MDA, Alriyami K, Jumaat MZ, Muda ZC. Development of high strength natural fibre based composite plates for potential application in retrofitting of RC structure. Indian Journal of Science and Technology. 2015 Jul; 8(15):1–7. DOI: 10.17485/ijst/2015/v8i15/70878.
  • Farhana NIE, Majid MSA, Paulraj MP, Ahmadhilmi E. Determination of volume fraction of a glass fibre/ matrix composite plate using vibration analysis. Indian Journal of Science and Technology. 2015 Aug; 8(20):1–13. DOI: 10.17485/ijst/2015/v8i20/79114.

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.