EFFECTS OF TEMPERATURE AND ENVIRONMENT ON MECHANICAL PROPERTIES OF TWO CONTINUOUS CARBON-FIBER AUTOMOTIVE STRUCTURAL COMPOSITES

Ruggles-Wrenn, M. B.

Oak Ridge National Laboratory

关键词: Mechanical Properties;    Testing;    Fibers;    Recommendations;    36 Materials Science;   

DOI  :  10.2172/885829
RP-ID  :  ORNL/TM-2003/117
RP-ID  :  DE-AC05-00OR22725
RP-ID  :  885829

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Durability of Carbon-Fiber Composites Project was established at Oak Ridge National Laboratory (ORNL) by the U.S. Department of Energy to develop experimentally based, durability-driven design guidelines to assure the long-term (15-year) structural integrity of carbon-fiber-based composite systems for automotive structural applications. The project addressed characterization and modeling the durability of a progression of carbon-reinforced thermoset materials, each of which has the same urethane matrix. The primary purpose of this report is to provide the individual specimen test data. Basic mechanical property testing and results for a reference [{+-}45{sup o}]{sub 3S} crossply composite and a quasi-isotropic, [0/90{sup o}/{+-}45{sup o}]{sub S} version of the reference crossply are provided. The matrix and individual {+-}45{sup o} stitch-bonded mats are the same in both cases. Although the composite utilized aerospace-grade carbon-fiber reinforcement, it was made by a rapid-molding process suitable for high-volume automotive use. Behavioral trends, effects of temperature and environment, and corresponding design knockdown factors are established for both materials. The reference crossply is highly anisotropic with two dominant fiber orientations--0/90{sup o} and {+-}45{sup o}. Therefore properties were developed for both orientations.