| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
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| Symposium
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2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
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| Presentation Title |
Shrinkage Induced Distortions in Symmetric Laminates of Double Curvature |
| Author(s) |
R Byron Pipes, Kwanchai Chinwicharnam, Vaughan Doty, Harsha Ramamurthy, Justin Hicks, Eduardo Barocio |
| On-Site Speaker (Planned) |
Kwanchai Chinwicharnam |
| Abstract Scope |
Shrinkage induced deformation of symmetric composite laminates occurs as the result of numerous phenomena that serve to increase or decrease the volume of the matrix phase of fiber-reinforced composite materials. This shrinkage in composite laminates is an important consideration in the manufacture of structural geometries of single and double curvature. A summary of the considerations appropriate to accommodating shrinkage in composites manufacture is given in Table 1, adapted from the work of Fernlund et al [1]. The shrinkage distortion of single curvature, symmetric laminates is well understood according to the Radford equation developed in 1987 [2]. However, the shrinkage distortions of double curvature, symmetric laminates has only recently been described with the “Theorema Egregium” by Gauss [3]. Prediction of changes in Gaussian curvature for double curvature geometries due to shrinkage is developed for isometric deformation (bending deformation without area change) in earlier work of the authors [4]. More recently, the authors have developed approaches to non-isometric geometries and applied these formulations to composite geometries of interest including the curved L-angle, cylindrical segments of double curvature and a double curved geometry with ply drops. The focus of the present study is the consideration of spring-in and spring-out phenomena ever present in symmetric laminates of multiple curvature and subjected to various shrinkage phenomena.
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| Proceedings Inclusion? |
Definite: Post-meeting proceedings |