Instrumentation foam effects

The sulfur foams for these tests were foamed-in-place with pilot field equipment at a foaming rate of 100 lb/min. Installation, instrumentation, and performance of these tests have been reported in detail (1,2). Field surveillance data and sample analysis over two years so far indicate design insulation effectiveness and property integrity (Figures 1 and 2, Table I). 

Wongsuban, B., Muhammad, K., Ghazah, Z., Hashim, K., Hassan, M. A., The effect of electron beam irradiation on preparation of sago starch/polyvinyl alcohol foams. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 2003,211(2), 244-250. 

Ramakrishnan et al. [19] discussed the effect of block copolymer nano-reinforcements on the low-velocity impact response of sandwich structures. They employed an instrumented drop tower setup for the low-velocity impact tests of the sandwich plates with neat and nano-reinforced epoxy matrix, at different energies. They identified the macroscopic response of the sandwich structure and the microscopic phenomena involved in dissipating the impact energy and compared it for the sandwich plates with (and without) nanoparticles. They evaluated the dynamic response of sandwich composites based on Kevlar fiber reinforced epoxy and Rohacell foam and reported an improvement in impact performance with these sandwich structures that was achieved by the addition of nanoparticles to the resin matrix. In their work an acrylate triblock copolymer that self-assembles in the nanometer scale, called Nanostrength, was added to the epoxy matrix. The effect of the nano-reinforcements on flat sandwich plates undergoing low-velocity impact was investigated at different scales. 

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