TY - JOUR
AU - Tan, K.
AB - The impact performance of T650-35 stitched polyimide laminates and unstitched CFRP woven laminates is investigated at 23 and − 70 °C. Three impact energy levels of 6.7, 13.4, and 18.4 J/mm are selected to analyze the resulting damage modes. The results from the force–displacement and the absorbed energy curves evidently show that at − 70 °C, the specimens have noticeably higher initiation damage force for both material systems. Moreover, more significant load drops are observed at − 70 °C curves compared to the room temperature curves, which imply that multiple damage modes exist in greater extent at low temperature. The results further show that the T650-35 polyimide composites require higher impact load to initiate the matrix damage, indicating that the stitches efficiently suppressed the crack propagation on the samples. Furthermore, the T650-35 stitched polyimide composites can carry higher damage loads in both temperatures compared to the unstitched CFRP woven composites. X-ray micro-computed tomography technique is employed to reveal multiple complex impact damage modes. Results show that for unstitched composites impacted at 6.7 J/mm, − 70 °C samples experience multiple damage modes that include significant delamination, fiber breakage. However, for stitched composites impacted at 13.4 J/mm, similar complex damage modes are observed at 23 and − 70 °C.
TI - Impact Performance of Stitched and Unstitched Composites in Extreme Low Temperature Arctic Conditions
JF - Journal of Dynamic Behavior of Materials
DO - 10.1007/s40870-018-0158-2
DA - 2018-06-19
UR - https://www.deepdyve.com/lp/springer-journals/impact-performance-of-stitched-and-unstitched-composites-in-extreme-0uj012joG0
SP - 317
EP - 327
VL - 4
IS - 3
DP - DeepDyve
ER -