Room-temperature transverse compressive creep of thick Kevlar fabric/ epoxy laminates
Creep and recovery of thick Kevlar 49/epoxy composites were investigated in transverse compressive loading at room temperature. Cylindrical samples with void contents of 4 and 14 percent were tested along with those of unreinforced resin. The composites exhibited logarithmic creep. Creep rates were 2 times higher over the entire stress range for the high porosity composites. At a stress of 87 MPa the resin creep curve was similar to that of the composites. At higher stresses, the resin crept faster and exhibited more strain. It is proposed that axial compressive creep of the cylindrical composite specimens is governed by Poisson induced strains leading to tensile loading of the reinforcing fibers. Axial initial strain and creep rate data for the composite were converted to radial data using measured values of Poisson ratio. These values of composite specimen radial creep rate were in good agreement with tensile creep data of Kevlar 49 fibers.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5220696
- Report Number(s):
- SAND-80-0104C; CONF-801010-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
360403 -- Materials-- Polymers & Plastics-- Mechanical Properties-- (-1987)
ARAMIDS
CONTAINERS
CREEP
EPOXIDES
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
PRESSURE VESSELS
PROCESSING
RECOVERY
REINFORCED MATERIALS
REINFORCED PLASTICS
RESINS
TEXTILES
WASTE MANAGEMENT
WASTE PROCESSING