Accession Number:

ADA172704

Title:

Stress Rates in Continuum Mechanics and Computer Codes.

Descriptive Note:

Technical rept. 1 Nov 84-1 Apr 86,

Corporate Author:

S-CUBED LA JOLLA CA

Personal Author(s):

• Brownell,D. H. , Jr

Report Date:

1986-04-10

Pagination or Media Count:

23.0

Abstract:

The concept of an objective frame indifferent stress rate is introduced. The behavior of several objective stress rates in a material undergoing simple extension is discussed. The response of a hypoelastic material in simple shear, in both the elastic and elaticplastic regimes, is evaluated, and it is concluded that for materials with low yield strength, such as metals and geologic materials, use of the Jaumann stress rate is justified. Keywords Stress Rates Objectivity Constitutive Relations Frame Indifference Plasticity.

Descriptors:

• *STRESSES
• *PLASTIC PROPERTIES
• COMPUTERIZED SIMULATION
• METALS
• ELASTIC PROPERTIES
• RATES
• CONTINUUM MECHANICS
• ROCK
• SHEAR STRESSES
• YIELD STRENGTH

Subject Categories:

• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE