Dynamic Fracture Toughness: Critical Review of Materials and Developments

Abstract

For design to be more safe, dynamic fracture toughness (DFT) of material needs to be determined. Compared to static loading, dynamic loading procedures are not well established. Calculation of DFT is complicated and costly. Failure process of structures is greatly influenced by dynamic loading. In the past only steel and cast iron were employed for structure design purposes but now many new materials such as (a) composite, (b) alloys (titanium, magnesium), (c) ceramic, (d) concrete, and (e) brittle materials are being used. DFT calculations of materials under dynamic loading have resulted in new theories and experimental techniques. In this paper a critical review of the developments for the calculation of DFT for the materials is presented.

Analyzing the Effects of the Hollow Bars on Compression Experimental Setup Using Numerical Methods

“…The Kolsky et al [1] developed Hopkinson bar setup is commonly employed for this purpose. According to [2,3] for the structural design, the use of composites, rubber and ceramics has not only resulted in the formulation of new concepts but new experimental techniques have evolved. Chen et al [4] studied the dynamic fracture behavior of low impedance material using the hollow transmission bar made of high strength aluminum alloy.…”