Glass-epoxy composite behaviour under shock loading

Abstract

Shock compressibility and sound velocity in commercial fibre-glass at pressures up to 22GPa were studied using manganin gauges. Free surface wave profiles were measured by Doppler velocity interferometry at pressures of about 1GPa. Material spall strength and viscosity were evaluated.

The effect of orientation on the shock response of a carbon fibre–epoxy composite

“…This type of behaviour is typical of a wide range of materials, including metals [10] and some polymers [11], including epoxy resins [12,13]. A linear U s -u p relationship was also observed by Zhuk et al [4], thus it would appear that in the through thickness orientation, this class of composite displays fairly typical behaviour. Riedel et al [14] also noted this behaviour for a carbon fibre -epoxy composite.…”

“…The explosives community has long considered particulate composite systems as many modern insensitive high explosive formulations consist of explosive crystals embedded in a polymeric binder [1][2][3][4]. Other applications include potting compounds for electronics (consisting of alumina particles in epoxy) have also been studied [5][6][7].…”

Study of the response of CFRP composite laminates to a laser-induced shock

“…Other studies describe the behaviour of CFRP laminates under plate impact in the through-thickness direction [18], and along the fibre direction [19,20]. The response of glass fibers reinforced epoxy [21,22] Kevlar/epoxy and Spectra/epoxy composites [23] to a planar impact has also been investigated.…”

Design of the Energy Partitioning Energy Coupling (EPEC) NIF Experiment

“…Like fused silica, BK7 is amorphous glass and may exhibit a dispersive shock wave, in which case we would expect a ramp wave in the strain sensors embed in the BK7 (Zhuk 1994;Fritz 1978). Since an amorphous glass does not have a crystalline structure, it appears this dispersive behavior would not be due to a phase transition.…”

“…Since an amorphous glass does not have a crystalline structure, it appears this dispersive behavior would not be due to a phase transition. Besides phase transitions, other discussion of dispersive shock waves in solids in the literature (Zhuk 1994;Fritz 1978) involve collapsing pores, deformation in components of layered materials, and large--amplitude rapid oscillations in the KdV equation producing an averaged dispersive wave, the application of which seems unclear in this case. The most probable mechanism for a dispersive shock wave appears to be a local densification of the atomic matrix.…”