IMPACT BEHAVIOUR OF HIGH PERFORMANCE GLASS FIBRE REINFORCED CEMENT COMPOSITE LAMINATES

Author(s): J. Wastiels, J. Van Ackeren, D. Van Nuffel and W. Van Paepegem
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 317-324
Total Pages: 8
Language: English

Abstract: Instrumented drop weight impact tests were performed on 15 identical phosphate cement composite laminates, reinforced with glass fibre chopped strand mats (fibre volume 24%), clamped along their four edges. The level of the impact energy was varied between 3.7 J and 69.5 J by changing the drop height of the impactor. Contact force-deflection curves were obtained for each impact test, and assembled to a master curve for all tests. The obtained shape of this master curve is very similar to that for polymer matrix composites, indicating that after a quasi-elastic energy absorption phase, local damage is occurring after reaching the peak force, followed by elastic rebound of the impactor. A difference exists however in the absence of closed curves, ue to matrix cracking.

The interpretation of the data is performed following the energy profiling method proposed by Liu [1]. The values obtained for the damage initiation threshold (23 J), the penetration threshold (44 J), the perforation threshold (69 J), as well as the energy absorption efficiency of 75% (the percentage of absorbed energy up to the perforation) are comparable with polymer matrix composites of similar dimensions.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00