Cure-induced deformation of ultra-thin composite laminates
Abstract
In fiber reinforced composite materials, the manufacturing process induces residual stresses and distortions that decrease the mechanical performance of the structure and affect its geometry, especially in thin laminates. Multi-physics simulations were performed to assess the spring-in effect in ultra-thin composite parabolic solar reflectors. For this purpose, a resin kinetic model has been developed by means of differential scanning calorimetry experiments. The kinetic relation has been implemented into the finite element software in order to correctly predict the evolution of the composite degree of cure during the manufacturing process. Specimens were produced in an autoclave and their final geometries were measured by means of a non-contact measuring system and compared with numerical predictions, showing very good agreement.
Additional Information
© 2018 American Institute of Aeronautics and Astronautics. Financial support from the Northrop Grumman Corporation is gratefully acknowledged. DSC experiments were performed in the Kornfield Lab at the California Institute of Technology: we thank Dr. T. Di Luccio and Mr. K. Ramachandran for helpful comments and discussions. The manufacturing and measurements of composite laminates were carried out at the Space Structure Laboratory at the California Institute of Technology. Numerical simulations were performed using COMPRO simulation software package for Abaqus, developed by Convergent Manufacturing Technologies.Attached Files
Accepted Version - Scitech2018_Bosi_Pellegrino_REVISED.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:0397eb89c69514375ce384fae6cbdfd4
|
9.0 MB | Preview Download |
Additional details
- Eprint ID
- 97675
- Resolver ID
- CaltechAUTHORS:20190806-133219697
- Northrop Grumman Corporation
- Created
-
2019-08-07Created from EPrint's datestamp field
- Updated
-
2023-06-01Created from EPrint's last_modified field
- Caltech groups
- GALCIT, Space Solar Power Project
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2018-2241