The Development of Nondestructive Methods for the Quantitative Evaluation of Advanced Reinforced Plastic Composites.
Final rept. 1 Aug 68-31 Oct 69,
AVCO GOVERNMENT PRODUCTS GROUP LOWELL MA AVCO APPLIED TECHNOLOGY DIV
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This final report documents the completion of the fifth year of a continuing study concerned with the development of nondestructive testing techniques for quantitatively evaluating advance fiber- reinforced plastic composites. Five boron epoxy panels, one plain weave carboncarbon panel, and a 3-D quartzphenolic ssphere were nondestructively and destructively tested for mechanical properties behavior and physical properties characteristics. It was the purpose of this program to a ESTABLISH PREDICTIVE CORRELATIONS BETWEEN ULTRASONICALLY-DETERMINED MODULUS VALUES AND DESTRUCTIVELY-MEASURED TENSILE, COMPRESSION, FLEXURE AND SHEAR MODULUS AND STRENGTH VALUES FOR THE 2-D composites b relate 2- D and 3-D ultrasonic polar modulus values with apreviously-derived micro-mechanics- based theory for generating polar modulus values c demonstrate the feasibility of applying a recently-conceived 6Interval Velocity Technique6 to reinfroced composites d demonstrate the capability of a nondestructive, multiple-energy, gamma- ray radiometric technique for predicting mixture concentrations in boronepoxy composites and e investigate the use of width-and across-ply measurements of ultrasonic velocity for predicting the mechanical modes of failure occurring in composite test specimens. Author, modified-PL
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods