High Performance Composites and Adhesives for V/STOL Aircraft.
Abstract
An interdisciplinary program has been undertaken to address the composite and adhesive materials requirements of V/STOL aircraft. The primary tasks are to develop and characterize high modulus, high toughness resins with use temperatures of 350 F to 450 F or higher, to develop fabrication technology of newly developed resin matrices for graphite-fiber reinforced composites, to develop composite failure criteria for design optimization and to establish appropriate quality control parameters. This report is the third annual review of the program, covering the period 1 September 1977 to 30 November 1978. The reporting period was extended to permit completion of an important phase of the task on fracture behavior of composites. During the reporting period, two of the original tasks, Resin Synthesis and Radiation Curing, were terminated but related work is being continued under other in-house projects to follow up leads developed in this program. Among recent accomplishments are the demonstration that resin fracture energy can affect composite interlaminar toughness in fiber-reinforced composites, the development of quality control methodology for phthalocyanine precursor resins, the successful fabrication of phthalocyanine/graphite fiber composites from prepreg, and the completion of room temperature fracture tests of NARMCO 5208/T300 composite over four quadrants of load space and Hexcel F178/T300 composite in one quadrant and further verification of the ability to use this data to predict failure in a box-beam structure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 23, 1979
- Accession Number
- ADA069611
Entities
People
- Luther B. Lockhart Jr
Organizations
- United States Naval Research Laboratory