A revisit to high-rate mode-II fracture characterization of composites with Kolsky bar techniques.
Nowadays composite materials have been extensively utilized in many military and industrial applications. For example, the newest Boeing 787 uses 50% composite (mostly carbon fiber reinforced plastic) in production. However, the weak delamination strength of fiber reinforced composites, when subjected to external impact such as ballistic impact, has been always potential serious threats to the safety of passengers. Dynamic fracture toughness is a critical indicator of the performance from delamination in such impact events. Quasi-static experimental techniques for fracture toughness have been well developed. For example, end notched flexure (ENF) technique, which is illustrated in Fig. 1, has become a typical method to determined mode-II fracture toughness for composites under quasi-static loading conditions. However, dynamic fracture characterization of composites has been challenging. This has resulted in conflictive and confusing conclusions in regard to strain rate effects on fracture toughness of composites.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 988976
- Report Number(s):
- SAND2010-1486C; TRN: US201019%%226
- Resource Relation:
- Conference: Proposed for presentation at the 2010 SEM Annual Conference held June 7-10, 2010 in Indianapolis, IN.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Delamination behavior of carbon fiber/epoxy composite laminates with short fiber reinforcement
An Innovative Technique for Evaluating the Integrity and Durability of Wind Turbine Blade Composites