Shock Response of Polymethylmethacrylate

Abstract

Polymethylmethacrylate (PMMA) from two suppliers is subjected to shock loading up to 2 GPa to develop understanding of the effect of manufacturing process on the shock response. The particle velocity, shock velocity, and longitudinal and lateral stresses are measured simultaneously and independently using photon Doppler velocimetry and manganin gauges. The particle velocity measurements agree with data in the literature. The calculated shear stress was seen to deviate from linear behavior at approximately 2 GPa, which is consistent with other experiments. Overall, the selection of material is shown to have up to a 10 % effect on shock properties, but the average difference is less than 2 %, which indicates that the varying the PMMA supplier may not have a dramatic effect on test using PMMA as a window or gap material.

Characterizing organic particle impacts on inert metal surfaces: Foundations for capturing organic molecules during hypervelocity transits of Enceladus plumes

“…Values of C and S for the CS materials, PMMA, and glass for different velocity ranges (Ahrens and Johnson ; Jordan et al. ).…”

The Strength of Two HMX Based Plastic Bonded Explosives During One Dimensional Shock Loading

“…As a consequence, we have taken the opportunity to study the purely mechanical response of two of these materials (the HMX based PBXs EDC32 and EDC37), using manganin stress gauges in longitudinal and lateral orientation to the shock loading axis. This technique has been used previously on metals [43,44], ceramics and silicate glasses [45,46], polymers [47,48] and particulate composites [24]. The primary goal of this investigation is to determine the shear strength of these materials, both as a function of imposed shock stress and its variation with time behind the shock front.…”

An Experimental Investigation of Spall Fracture in Neat Epoxy and an Epoxy/Carbon Nanotube Composite

“…They found that wave propagation was affected by nonlinearity in the material, strain-rate dependence, and elastic-plastic effects. More recent experimentation by Jordan et al [32] confirmed and expanded upon their findings. Carter and…”

“…The results from each experiment will now be discussed on a material-by-material basis in the following sections of this report. [32]. c N.S.…”

“…Fortunately, the Hugoniot state particle velocities (u p ) were measured from the back surface of the targets using the PDV system. Since the U s -u p Hugoniot of PMMA is available in the literature [32], it was possible to predict the shock velocities associated with the Hugoniot state particle velocities measured for these impacts. The shock velocities for shots performed without shock pins were calculated using the empirical polynomial for PMMA, U s = 6.486u 3 p − 7.823u 2 p + 3.549u p + 2.703 for u p < 0.4 km·s −1 provided by Jordan et al [72].…”