Assessment of fatigue damage evolution in woven composite materials using infra-red techniques
Fruehmann, R.K., Dulieu-Barton, J.M. and Quinn, S. (2010) Assessment of fatigue damage evolution in woven composite materials using infra-red techniques. Composites Science and Technology, 70, 937-946. (doi:10.1016/j.compscitech.2010.02.009).
Thermoelastic stress analysis (TSA) is used to study the growth of fatigue damage in single and two
ply, 2 x 2 twill woven composite materials. Test specimens were subjected to a uniaxial tensile cyclic
loading with maximum stresses of 10, 15 and 20% of the ultimate failure stress. The development of
fatigue damage locally within the weft yarns is monitored using high resolution TSA. The specimens
were subsequently inspected using optical microscopy to evaluate the location and extent of cracks.
Cracks were found in the weft fibres, running transverse to the loading direction. It is demonstrated that
the lighter weight fabric is more resilient to damage progression. A signature pattern is identified in the
TSA phase data that indicates the onset and presence of fatigue damage in the composite material.
|Keywords:||A: Textile composites, B: Fatigue, C: Stress concentrations, Thermoelastic stress analysis (TSA)|
|Subjects:||T Technology > TJ Mechanical engineering and machinery|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
|Date Deposited:||18 Feb 2010|
|Last Modified:||14 Apr 2014 10:20|
Application of Thermoelastic Stress Analysis as a design tool for the assessment of complex composite components
Funded by: EPSRC (EP/D037271/1)
Led by: Simon Quinn
2 May 2006 to 1 May 2009
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