Dynamic and Quasi-Static Compressive Deformation Behaviour of Polyimide Foam at Various Elevated Temperature

Abstract:

In order to clarify the effect of strain rate and test temperature on the compressive strength and energy absorption of polyimide foam, a series of compression tests for the polyimide foam with two different densities were carried out. By using three testing devices, i.e. universal testing machine, dropping weight machine and sprit Hopkinson pressure bar apparatus, we performed a series of compression tests at various strain rates (10^-3~10³ s^-1) and at several test temperatures in the range of room temperature to 280 ̊C. At over 100 s-1, the remarkable increase of flow stress was observed. The negative temperature dependence of strength was also observed.

• Periodical: Applied Mechanics and Materials (Volume 566)
• Pages: 158-163
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.566.158
• Online since: June 2014
• Authors: A. Yosimoto*, Hidetoshi Kobayashi, Keitaro Horikawa, Keiko Watanabe, Kinya Ogawa
• Keywords: Density Compensation, Energy Absorption, High Temperature, Impact Compression, Strain Rate Dependency

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