The experimental determination of prepreg tack and dynamic stiffness
Article
Crossley, R. J., Schubel, P. J. and Warrior, N. A.. 2012. "The experimental determination of prepreg tack and dynamic stiffness." Composites Part A: Applied Science and Manufacturing. 43 (3), pp. 423-434. https://doi.org/10.1016/j.compositesa.2011.10.014
| Article Title | The experimental determination of prepreg tack and dynamic stiffness |
|---|---|
| ERA Journal ID | 4882 |
| Article Category | Article |
| Authors | Crossley, R. J. (Author), Schubel, P. J. (Author) and Warrior, N. A. (Author) |
| Journal Title | Composites Part A: Applied Science and Manufacturing |
| Journal Citation | 43 (3), pp. 423-434 |
| Number of Pages | 12 |
| Year | 2012 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 1359-835X |
| 1878-5840 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compositesa.2011.10.014 |
| Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S1359835X11003538 |
| Abstract | A new peel test has been developed which quantifies the tack and dynamic stiffness of uncured prepreg. The test is designed to simulate the automated tape lay-up (ATL) and automated fibre placement (AFP) processes. It includes a pressure controlled application stage, where contact time is inversely proportional to peel rate. The use of a thin film allows stiffness to be isolated from peel resistance in a continuous two stage test. A repeatability study revealed consistent results with 16% standard deviation. Tack and stiffness variability has been observed across roll width and between faces in commercial hand lay-up prepregs. The overall tack and stiffness values for commercial hand lay-up prepregs were found to be inconsistent with the levels specified by manufacturers. A temperature increase revealed inconsistent effects on tack between materials. The contradictory results were rationalised by observing failure modes. The two failure modes observed appeared equivalent to those found in pressure sensitive adhesive (PSA) peel. The shear storage modulus of the prepreg resin was compared to the PSA Dahlquist criterion and found to support the principle of contact efficiency. However, the actual value for the criterion is expected to be a function of prepreg specific conditions such as resin content, fibre distribution and surface pattern. |
| Keywords | A. Prepreg; B. Tack; C. Adhesion; D. ATL; B. Tack; Contact time; D. ATL; Dynamic stiffness; Experimental determination; Fibre placement; Hand lay-up; Peel resistance; Peel tests; Prepregs; Pressure-sensitive adhesives; Resin content; Shear storage modulus; Standard deviation; Stiffness values; Surface pattern; Temperature increase; Two stage; Strength of Building Materials; Mechanical Properties; Strength of Building Materials; Test Equipment and Methods; Chemistry; Organic Polymers; Rubber Products; Materials Science; |
| ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | University of Nottingham, United Kingdom |
| Institution of Origin | University of Southern Queensland |
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