Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7890410 | Composites Part A: Applied Science and Manufacturing | 2016 | 7 Pages |
Abstract
Self-reinforced composites offer a unique combination of properties such as high specific strength, high impact resistance, and recyclability by incorporating highly aligned fibers within a random matrix of the same polymer. However, high temperatures will shrink the system to recover randomness in the aligned segments, compromising the composite thermal stability during processing as self-reinforced tapes are consolidated into the final composite through heating and pressure. Hence, the dynamic nonlinear multivariable (i.e., time, temperature, stress) shrinkage exhibited by self-reinforced polypropylene (SRPP) tapes was measured and modeled at the maximum shrinkage limit achieved in the proximity of the composite processing temperature [â¼140 to160 °C]. At high stress (â¼7.5 MPa) the thermal shrinkage of the SRPP tapes was reduced and a parallel creep mechanism was activated. The modeling, and prediction of the main factors governing the thermal shrinkage expand and diversify the dynamic design window for new SRPP composites.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jairo A. Diaz, Jeffrey P. Youngblood,