TY - JOUR
T1 - Thermo-viscoelastic analysis of GLARE
AU - Abouhamzeh, M.
AU - Sinke, J.
AU - Jansen, K. M B
AU - Benedictus, R.
PY - 2016
Y1 - 2016
N2 - In this paper, the study of residual stresses in Fibre Metal Laminates (FMLs) is improved using a thermo-viscoelastic model developed for composites which have an orthotropic viscoelastic response. Prepreg layers of GLARE consist of epoxy adhesive that has temperature dependent and viscoelastic response in thermal environments such as the curing cycle. Thermal and viscoelastic response of the adhesive is already characterised using thermo-mechanical methods. In order to get the response for unidirectional fibre-epoxy composite (prepreg) layers, the Correspondence principle is utilised with self-consistent micromechanics equations in the Laplace domain. By reverting, the thermo-viscoelastic response of the composite layer is obtained in the time domain. A user defined material model is added to ANSYS able to analyse the orthotropic thermo-viscoelastic behaviour. Using the developed model, residual stresses of GLARE are calculated. Comparison to the curvature measurements of manufactured non-symmetric laminates, shows the accuracy of the modelling and the improvements with respect to the thermo-elastic analyses.
AB - In this paper, the study of residual stresses in Fibre Metal Laminates (FMLs) is improved using a thermo-viscoelastic model developed for composites which have an orthotropic viscoelastic response. Prepreg layers of GLARE consist of epoxy adhesive that has temperature dependent and viscoelastic response in thermal environments such as the curing cycle. Thermal and viscoelastic response of the adhesive is already characterised using thermo-mechanical methods. In order to get the response for unidirectional fibre-epoxy composite (prepreg) layers, the Correspondence principle is utilised with self-consistent micromechanics equations in the Laplace domain. By reverting, the thermo-viscoelastic response of the composite layer is obtained in the time domain. A user defined material model is added to ANSYS able to analyse the orthotropic thermo-viscoelastic behaviour. Using the developed model, residual stresses of GLARE are calculated. Comparison to the curvature measurements of manufactured non-symmetric laminates, shows the accuracy of the modelling and the improvements with respect to the thermo-elastic analyses.
KW - GLARE
KW - Glass-epoxy prepreg
KW - Temperature dependent
KW - Viscoelastic
UR - http://www.scopus.com/inward/record.url?scp=84973316114&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2016.05.060
DO - 10.1016/j.compositesb.2016.05.060
M3 - Article
SN - 1359-8368
VL - 99
SP - 1
EP - 8
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -