Accession Number:

ADA076334

Title:

Effects of Proof-Test on the Strength and Fatigue Life of a Unidirectional Composite.

Personal Author(s):

Corporate Author:

DYNA EAST CORP WYNNEWOOD PA

Report Date:

1979-05-01

Abstract:

The effects of a static proof-load on the statistical distribution of the static strength and fatigue life of a unidirectional graphite-epoxy laminate As-3501-05 are investigated experimentally. Loading mode for both the static and fatigue tests is restricted to uniaxial tension in the fiber direction. 6-ply tension coupons with dimensions of 22.9 cm x 1.9 cm are used and all tests are conducted using a closed-loop Instron tester, under room temperature 21 C and ambient humidity 60 R.H. conditions. The data are analyzed using a two-parameter Weibull distribution in conjunction with the max. likelihood method for parameter estimation. Results show that proof-load can guarantee a min. static strength, and to less degree can assure a min. fatigue life. Author

Descriptive Note:

Interim technical rept. 1 Apr 78-31 Mar 79,

Supplementary Note:

DOI: 10.21236/ADA076334

Pages:

0032

Descriptors:

Identifiers:

Subject Categories:

Contract Number:

F33615-77-C-5039

File Size:

12.20MB

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