Dynamic tensile strength of organic fiber-reinforced epoxy micro-composites |
| |
| Authors: | S Katz E Zaretsky E Grossman HD Wagner |
| |
| Affiliation: | 1. Space Environment Section, Soreq NRC, Yavne 81800, Israel;2. Dept. of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel;3. Dept. of Mechanical Engineering, Ben-Gurion University of the Negev, Beer–Sheva 84105, Israel;1. Institute of Microelectronics & Department of Electrical Engineering, Center for Micro/Nano Science and Technology, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan;2. Department of Electronic Engineering, National Formosa University, Yunlin 632, Taiwan;1. Rescoll, Société de recherche, 17300 Rochefort, France;2. Institut Pprime, CNRS, ISAE-ENSMA, Université de Poitiers, F-86962 Futuroscope, Chasseneuil, France;1. Department of Mechanical and Aerospace Engineering, Rutgers University, 98 Brett Road, Piscataway, NJ 08854, USA;2. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;3. School of Materials Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA |
| |
| Abstract: | Outer surfaces of spacecraft in orbit are exposed to hypervelocity impact originating from micro-meteoroids and space debris. The structural composite materials are integral parts of the spacecraft envelope. We studied the impact response of structural micro-composites containing Kevlar 29, spectra 1000 and oxygen RF (Radio Frequency) plasma surface-treated spectra 1000 fibers of 27-μm diameter, embedded in 100-μm epoxy resin films, in a series of planar impact experiments. The composites were loaded by 50-μm aluminum and polycarbonate impactors having velocities ranging from 400 to 550 m/s. The velocity of the free surface of the composite samples was continuously monitored by VISAR (Velocity Interferometer System for Any Reflector). The dynamic tensile (spall) strength of the micro-composites was calculated on the basis of the recorded free surface velocity profiles. Correlations were found between the spall strength and the separately measured: (i) fiber/matrix interfacial adhesion, (ii) tensile strengths of the fibers, of the matrix and of the micro-composites, and (iii) internal residual stresses. The spall strength of surface-treated spectra fibers micro-composites was found to be lower than that of both pristine spectra fibers micro-composites, and the pure epoxy film. The epoxy film reinforced by Kevlar fibers was found to have the highest spall strength. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
