TY - GEN

T1 - Compressibility and Relaxation Characteristics of Bindered Non-Crimp-Fabrics Under Temperature and Injection Fluid Influence

AU - Bender, Marcel

AU - Fauster, Ewald

PY - 2022/8/29

Y1 - 2022/8/29

N2 - This research examines the compression, as well as short- and long-term relaxa-tion behaviour of bindered textiles at elevated temperature levels. Experiments were conducted on a carbon fibre non-crimp fabric with epoxy resin binder in a specifically designed compressibility test rig. Expanding past research activities at room temperature [1, 2] it was found in series of loading-relaxation-unloading tests, that the test temperature level significantly influences the maximum compac-tion pressure during the loading stage as well as the pressure characteristics dur-ing the relaxation stage [3]. Furthermore, a significant change in the compression behaviour, well below the specified processing temperature of the binder, was found. Also, a proof-of-concept demonstrates the “in-situ”-injection capability of a novel test-rig, reproducing RTM-like conditions in a controlled laboratory envi-ronment. The findings of this work are intended to support optimizing preform-ing and preform handling steps for liquid composite moulding processes.

AB - This research examines the compression, as well as short- and long-term relaxa-tion behaviour of bindered textiles at elevated temperature levels. Experiments were conducted on a carbon fibre non-crimp fabric with epoxy resin binder in a specifically designed compressibility test rig. Expanding past research activities at room temperature [1, 2] it was found in series of loading-relaxation-unloading tests, that the test temperature level significantly influences the maximum compac-tion pressure during the loading stage as well as the pressure characteristics dur-ing the relaxation stage [3]. Furthermore, a significant change in the compression behaviour, well below the specified processing temperature of the binder, was found. Also, a proof-of-concept demonstrates the “in-situ”-injection capability of a novel test-rig, reproducing RTM-like conditions in a controlled laboratory envi-ronment. The findings of this work are intended to support optimizing preform-ing and preform handling steps for liquid composite moulding processes.

KW - Composites

KW - Compaction Behaviour

KW - RTM

U2 - https://doi.org/10.1007/978-3-662-65216-9

DO - https://doi.org/10.1007/978-3-662-65216-9

M3 - Conference contribution

SN - 978-3-662-65215-2

SP - 44

EP - 58

BT - Proceedings of the Munich Symposium on Lightweight Design 2021

PB - Springer Vieweg

CY - Heidelberg

ER -