Accession Number:

ADA056786

Title:

Effect of Hydrostatic Pressure on the Deformation Behavior of Polyethylene and Polycarbonate in Tension and in Compression.

Descriptive Note:

Final rept. 1 Jun 77-31 May 78,

Corporate Author:

UNITED STATES STEEL CORP MONROEVILLE PA RESEARCH LAB

Personal Author(s):

• Spitzig,W. A.
• Richmond,O.

Report Date:

1978-06-30

Pagination or Media Count:

51.0

Abstract:

The stress-strain response of crystalline high density polyethylene and of amorphous polycarbonate has been determined in tension and in compression at superimposed pressures up to 1104 MPa 160 ksi. All tests were conducted at room temperature and at a single imposed strain rate, and the specimens were coated with silicone rubber to protect them from the pressurizing fluid. Strain softening occurred in the polycarbonate at low pressures but was inhibited by pressure. Tensile necking occurred in both materials, but was promoted by pressure in polyethylene and inhibited in polycarbonate.

Descriptors:

• *PLASTIC DEFORMATION
• *POLYCARBONATES
• *POLYETHYLENE
• STRESS STRAIN RELATIONS
• DENSITY
• VOLUME
• RUBBER COATINGS
• TENSILE PROPERTIES
• AMORPHOUS MATERIALS
• CRYSTALS
• EXPANSION
• COMPRESSIVE PROPERTIES
• HYDROSTATIC PRESSURE
• SILICONE PLASTICS

Subject Categories:

• Plastics
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE