TY - GEN
T1 - Using DMA to study protection performance of polyurethane foam to underwater blast bubble impulsion
AU - Li, Maohui
AU - Bai, Chunhua
AU - Shi, Meiwu
AU - Zhou, Hong
PY - 2013
Y1 - 2013
N2 - A new test method for analyzing foam protection performance to underwater explosion bubble impulsion was proposed. Applying DMA dynamic compress mode of "low frequency-high frequency-low frequency" circulation periodically, bubble impulsion of "expand-contract-expand" to objects had been simulated. Testing with this method, several kinds of low density polyurethane foam specimens with different isocyanate index were analyzed. Testing results indicate that the low density polyurethane foams with isocyanate index R equal 1.8 have much higher energy dissipation modulus and loss factor to shock periodically, and conform to the theories of molecular structure. The results show that the test method is valuable.
AB - A new test method for analyzing foam protection performance to underwater explosion bubble impulsion was proposed. Applying DMA dynamic compress mode of "low frequency-high frequency-low frequency" circulation periodically, bubble impulsion of "expand-contract-expand" to objects had been simulated. Testing with this method, several kinds of low density polyurethane foam specimens with different isocyanate index were analyzed. Testing results indicate that the low density polyurethane foams with isocyanate index R equal 1.8 have much higher energy dissipation modulus and loss factor to shock periodically, and conform to the theories of molecular structure. The results show that the test method is valuable.
KW - Bubble impulsion
KW - Dynamic mechanical analysis
KW - Polyurethane foam
KW - Protection performance
UR - http://www.scopus.com/inward/record.url?scp=84873709672&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.651.174
DO - 10.4028/www.scientific.net/AMR.651.174
M3 - Conference contribution
AN - SCOPUS:84873709672
SN - 9783037856130
T3 - Advanced Materials Research
SP - 174
EP - 180
BT - 2012 International Conference on Engineering Materials, ICEM 2012
T2 - 2012 International Conference on Engineering Materials, ICEM 2012
Y2 - 30 December 2012 through 31 December 2012
ER -