Viscoelastic Creep and Relaxation in Laminated Composites.

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Abstract:

An extensive series of creep tests were made on bulk epoxy speci-mens Narmco 1004 and on three types of laminated specimens made from a composite Modmor II 5206 with this epoxy as its matrix. Tests were made at a wide range of temperatures and stresses. The resulting laminate creep curves were compared with calcu-lations employing a modified version of a computer program deve- loped in connection with earlier work on this project. An equation was developed that describes the epoxy as a thermorheo- logically simple substance, for use in non- isothermal viscoe-lastic calculations. The computer program was extended to per-form such calculations and used to compute the stresses in a balanced laminate assembled at 300F and cooled to 64F. Author-PL

Author(s):
Schwartz, Edward B. ; Mcquillen, Edward J.
Author Organization(s):
NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT
Descriptive Note:
Final rept.,
Pagination:
0145

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NADC-74196-30, GIDEP-E051-2056
Project Number(s):
A320-5203/202-B1/F51-544-201, A320-0000/001-B/F54-544-201
Monitor Series:
E051-2056, 501.30.27.00-NC-02
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*LAMINATES, *FIBER REINFORCED COMPOSITES, *CREEP, *EPOXY RESINS, TEMPERATURE, GRAPHS, NUMERICAL ANALYSIS, TEST METHODS, GRAPHITE, CARBON FIBERS, COMPUTER APPLICATIONS, THERMAL STRESSES
Field(s)/Group(s):
Laminates and Composite Materials
Keyword(s):
Epoxy laminates, Carbon fiber reinforced plastics
Report Date:
1974 Nov 04