Authors: Ichiro Shiota, Masahiko Kato, Hitoshi Kohri, Takayoshi Yagasaki, Koji Tanaka, Susumu Sasaki, Atsushi Yumoto
Fossil fuel energy is essential for our modern lives. Recently, environmental problems caused by the fuel are critical. Space solar power system (SSPS) is expected as one of future sustainable energy sources. SSPS will consist of large-size solar panels and equipment to transmit the electric power to the earth. Collision of debris with SSPS in space is a matter of concern. In our former paper, we reported a prospect to construct a thin and light weight CFRP protector by oblique collision. In the former experiment, two panels were placed parallel and a nylon 66 projectile was collided with the CFRP panels at a speed of 5km/s. The projectile did not penetrate the first CFRP panel and slid along the surface of it when the collision angle was less than 60 degree. In this paper, damage on the second CFRP panel with an oblique angle to the first panel, was precisely investigated. A projectile of nylon-66 was collided with the panels at a speed of 6 km/s. The projectile did not penetrate the second panel even though the first panel was seriously damaged. From these results, we obtained a prospect to construct a thin and lightweight protective panel. Novel shapes of a protector based on oblique collision are proposed.
Keywords: CFRP; SSPS; debris; oblique collision