X-ray CT image of a plain-woven SiC/SiC composite plate after high-velocity impact
This study conducted high-speed impact tests for CFRP cross-ply laminates and observed the damage patterns. The CFRP specimens were subjected to the vertical impact of a small steel ball at the impact speed of 300-600 m/s. A crater and multiple splits were generated on the front surface of the specimen, and splits with fiber breaks appeared on the back surface. Furthermore, delamination and catastrophic fracture of the inner ply were observed in the cross-section. The damage process due to the high-speed impact was then predicted by using a damage extension simulation based on the Smoothed Particle Hydrodynamics (SPH). The predicted damage pattern agreed with the observation, and the key factors of each damage type was predicted.
Moreover, soft-body impact simulations have been performed by a particle simulation method developed by our research group. Through detailed observation of damage progress, analytical prediction, and consideration of fracture mechanism, we aim to establish reliability evaluation technology for foreign-object impact.
Related publications
- S. Yashiro and T. Okabe. Int J Numer Meth Engng, Vol. 103, pp. 781-797 (2015)
- S. Yashiro et al. Compos Part A, Vol. 48, pp. 93-100 (2013)
- S. Yashiro et al. Compos Part B, Vol. 43(3), pp. 1353-1362 (2012)