Dynamic properties of ceramic materials

Quantitative analysis of inclusion distributions in hot pressed silicon carbide

“…When the time duration is sufficiently short, the cracks nucleated at defects will grow and coalesce until a total loss of load carrying capacity occurs [12e15]. Defects are often treated as initiation points or preferential paths for cracks in the literature [12], but there is uncertainty as to how they influence performance. If defects contribute to the observed variability in ballistic performance, this influence has yet to be experimentally confirmed.…”

Prediction of material strength and fracture of glass using the SPHINX smooth particle hydrodynamics code

“…Four aluminosilicate glass flyer plate impact experiments were conducted at the Sandia National Laboratories (Raiser et al, 1994;Grady and Wise, 1993). In two experiments the 6061-T6 aluminum flyer plates had a velocity of approximately 0.96 kdsec, and in the other two experiments the velocity was about 0.45 km/sec.…”

“…A schematic of the geometry is shown in The experiment at the higher velocity apparently had a sfliciently large compressive strength that the glass spall strength, To, went to zero (Raiser et ai., 1994). For the two lower velocity experiments, spall strengths of 34.9 and 33.5 kbar were reported (Grady and Wise, 1993). The SPHINX predictions therefore used a spall strength of zero for the higher velocity prediction and a spall strength of 34 kbar for the lower velocity one.…”

“…In the current work we use the SPHINX smooth particle hydrodynamics code (Stellingwerf' and Wingate, 1993;Wingate and Stellingwerf, 1994), described below, to predict data from one-dimensional experiments in which an aluminum flyer plate impacted a glass target (Raiser et al, 1994;Grady and Wise, 1993), and two-dimensional experiments in which a tungsten rod impacted glass, backed by mild steel (Anderson et al,1 1993). In the flyer plate experiments, a VISAR (laser velocity interferometer system) was used to measure the velocity as a function of time at the rear of the glass plate.…”

The high-strain-rate dynamic response of boron carbide-based composites: The effect of microstructure

“…The static mechanical properties of the RBBC composites are well established and have been reported in the literature [2,6,8,15]. The available information regarding the dynamic behavior of boron carbide-based materials relates mostly to hot-pressed boron carbide studied at strain rates varying between 10 3 and 10 6 s À1 [16][17][18][19][20][21][22]. Palfey et al [23] gave results on the aluminum-infiltrated boron carbide-composites at a strain rate of $10 3 s À1 .…”