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An investigation on the influence of loading rate on the fracture toughness of UHMW-PE composites

Paper presented at the 17th European Conference on Composite Materials, ECCM 2016, 26-30th June 2016, Munich, Germany
 
: May, Michael; Lässig, Torsten; Hiermaier, Stefan

:
Fulltext urn:nbn:de:0011-n-4353863 (437 KByte PDF)
MD5 Fingerprint: dd93e3b743082b9d74d426857fdc3f49
Created on: 22.2.2017


2016, 8 pp.
European Conference on Composite Materials (ECCM) <17, 2016, Munich>
English
Presentation, Electronic Publication
Fraunhofer EMI ()
fracture toughness; mechanical testing; computational modeling; strain rate

Abstract
Ultra-high molecular weight polyethylene composites are frequently used in ballistic impact applications. For predictive modeling of impact scenarios it is important to consider potential effects of loading rate on the mechanical properties of the composite – especially the fracture toughness. In this article, the influence of loading rate on the mode I fracture toughness of Dyneema® HB26 is studied. It was found that the fracture toughness increases with increasing loading rate. A material model for cohesive interface elements is proposed which includes both, the rate dependency of the mode I fracture toughness and the rate dependency of the out-of-plane tensile strength. The model is implemented into ABAQUS/Explicit and verified against the experimental evidence.

: http://publica.fraunhofer.de/documents/N-435386.html