| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Deformation Analysis of Thermosetting FRP During Cure Process Using a Homogenization-Based FEA |
| Author(s) |
Tatsuro Kosaka |
| On-Site Speaker (Planned) |
Tatsuro Kosaka |
| Abstract Scope |
Experimental costs to develop viscoelastic model of thermosetting FRP during cure process is very high due to necessity of many physical parameters. In the present paper, a constitutive equation of curing FRP was presented, and the macro parameters were explored by homogenization-based FEM analysis using a RVE model. Viscoelastic properties of epoxy resin were experimentally obtained during cure process. In this paper, macro parameters of viscoelastic model, coefficients of thermal expansion and curie-shrinking coefficient of unidirectional GFRP were calculated by numerical testing using RVE. Firstly, time-dependent stiffness of GFRP was calculated at various degree of cure. It was found that the shear components were strongly affected by temperature and degree of cure. On the other hand, fiber-directional stiffness components were insensitive to changes in temperature and degree of cure. Secondly, thermal expansion coefficients and curing strain rate were calculated using RVE and the obtained time-dependent stiffness. The results showed that the thermal expansion coefficients and curing strain rate of the unidirectional GFRP were insensitive to temperature and degree of cure. This indicates that the constitutive equations of FRP during cure process could be simplified using constant coefficients on thermal expansion and curing strain. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |