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Experimental study on dynamic mechanical behavior of aerospace- transparent polyurethane interlayer
Received date: 2014-08-13
Revised date: 2014-10-17
Online published: 2014-10-23
Supported by
National Natural Science Foundation of China (11372113); International Scientific and Technological Cooperation and Special Projects (2011DFA53080); State Key Laboratory of Explosion of Science and Technology (KFJJ14-2M); Independent Research of State Key Laboratory of Subtropical Building Science (2014ZC18)
Study on the dynamic properties of the polyurethane interlayer of laminated glass can provide material data and model for the impact resistance design of windshield of aircraft and high speed rail. The mechanical behavior of the polyurethane interlayer was investigated experimentally with the temperatures from -40 ℃ to 50 ℃ and strain rates from 0.001 s-1 to 6 500 s-1. Tests were performed by MTS5587 servo hydraulic testing machine and the split Hopkinson tension and compression bar, for low and high strain rate tests respectively. The obtained results show that the dynamic tensile response of the polyurethane interlayer is sensitive to temperature and strain rate. As strain rate increases and temperature decreases, flow stress goes up and hardening resistance behavior becomes more apparent. When the temperature decreases from -20 ℃ to -40 ℃, the stress-strain curves change significantly, the specimen transmits from a rubbery behavior to a glassy behavior. When the temperature is above 0 ℃, at a certain strain rate, dynamic tensile stresses are lower than dynamic compressive stresses, but when the temperature is below 0 ℃, dynamic tensile stresses are higher than dynamic compressive stress at the same strain.
YAO Xiaohu , ZHANG Longhui , ZHANG Xiaoqing , GUO Weiguo , ZANG Shuguang . Experimental study on dynamic mechanical behavior of aerospace- transparent polyurethane interlayer[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(7) : 2236 -2243 . DOI: 10.7527/S1000-6893.2014.0281
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