Durability-Based Design Guide for an Automotive Structural Composite: Part 2. Background Data and Models

Technical Report · Sun Feb 01 04:00:00 EST 1998

DOI:https://doi.org/10.2172/16716· OSTI ID:16716

Corum, J M ^[1]; Battiste, R L ^[2]; Brinkman, C R ^[2]; Ren, W ^[2]; Ruggles, M B ^[2]; Weitsman, Y J ^[2]; Yahr, G T ^[2]

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1. ORNL; Oak Ridge National Laboratory
2. ORNL

This background report is a companion to the document entitled ''Durability-Based Design Criteria for an Automotive Structural Composite: Part 1. Design Rules'' (ORNL-6930). The rules and the supporting material characterization and modeling efforts described here are the result of a U.S. Department of Energy Advanced Automotive Materials project entitled ''Durability of Lightweight Composite Structures.'' The overall goal of the project is to develop experimentally based, durability-driven design guidelines for automotive structural composites. The project is closely coordinated with the Automotive Composites Consortium (ACC). The initial reference material addressed by the rules and this background report was chosen and supplied by ACC. The material is a structural reaction injection-molded isocyanurate (urethane), reinforced with continuous-strand, swirl-mat, E-glass fibers. This report consists of 16 position papers, each summarizing the observations and results of a key area of investigation carried out to provide the basis for the durability-based design guide. The durability issues addressed include the effects of cyclic and sustained loadings, temperature, automotive fluids, vibrations, and low-energy impacts (e.g., tool drops and roadway kickups) on deformation, strength, and stiffness. The position papers cover these durability issues. Topics include (1) tensile, compressive, shear, and flexural properties; (2) creep and creep rupture; (3) cyclic fatigue; (4) the effects of temperature, environment, and prior loadings; (5) a multiaxial strength criterion; (6) impact damage and damage tolerance design; (7) stress concentrations; (8) a damage-based predictive model for time-dependent deformations; (9) confirmatory subscale component tests; and (10) damage development and growth observations.

• Research Organization: Oak Ridge National Lab., Oak Ridge, TN (US)
• Sponsoring Organization: USDOE, Washington, DC (US)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 16716
• Report Number(s): ORNL-6931; ON: UN98054795; BR: EE0401000
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CREEP
DEFORMATION
DESIGN
FIBERS
FLEXIBILITY
RECOMMENDATIONS
SHEAR
SIMULATION
TOLERANCE
URETHANE