TY - GEN

T1 - Experimental Determination and Numerical Modelling of Process Induced Strains and Residual Stresses in Thick Glass/Epoxy Laminate

A1 - Nielsen,Michael Wenani

A1 - Hattel,Jesper Henri

A1 - Løgstrup Andersen,Tom

A1 - Branner,Kim

A1 - Nielsen,Per Hørlyk

AU - Nielsen,Michael Wenani

AU - Hattel,Jesper Henri

AU - Løgstrup Andersen,Tom

AU - Branner,Kim

AU - Nielsen,Per Hørlyk

PY - 2012

Y1 - 2012

N2 - In this work, a cure hardening instantaneous linear elastic (CHILE) model and a path dependent (PD) constitutive approach are compared, for the case of modelling strain build-up during curing of a thick composite laminate part. The PD approach is a limiting case of viscoelasticity with path dependency on temperature and cure degree. Model predictions are compared to experimentally determined in-situ strains, determined using FBG sensors. It was found that both models offer good approximations of internal strain build-up. A general shortcoming is the lack of capturing rate-dependent effects such as creep.

AB - In this work, a cure hardening instantaneous linear elastic (CHILE) model and a path dependent (PD) constitutive approach are compared, for the case of modelling strain build-up during curing of a thick composite laminate part. The PD approach is a limiting case of viscoelasticity with path dependency on temperature and cure degree. Model predictions are compared to experimentally determined in-situ strains, determined using FBG sensors. It was found that both models offer good approximations of internal strain build-up. A general shortcoming is the lack of capturing rate-dependent effects such as creep.

KW - Numerical modeling

KW - Shape distortions

KW - FBG sensoring

KW - Curing

BT - ECCM15 - 15th European Conference On Composite Materials

T2 - ECCM15 - 15th European Conference On Composite Materials

ER -