Accession Number:

ADA190952

Title:

Heating at a Propagating Crack Tip in a Viscoplastic Material.

Descriptive Note:

Interim rept.,

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL STRUCTURAL MECHANICS LAB

Personal Author(s):

• Sung, J. C.
• Achenbach, J. D.

Report Date:

1987-09-01

Pagination or Media Count:

21.0

Abstract:

The crack tip temperature due to near-tip dissipation of mechanical energy has been calculated for a crack propagating in a viscoplastic material. The mechanical behavior of the material was represented by a model proposed by Bodner and Partom. On the basis of the adiabatic approximation the maximum temperature has been investigated as a function of the crack-tip speed and the material parameters. For a specific crack-tip speed, T sub max is displayed as a function of the material constant, D sub o which defines the asymptotic limit of the inelastic strain rate as the stress level increases. The maximum temperature increases with increasing values of D sub o. Keywords Mathematical models Computations.

Descriptors:

• *CRACKS
• *VISCOPLASTICITY
• *CRACK PROPAGATION
• ADIABATIC CONDITIONS
• COMPUTATIONS
• ELASTIC PROPERTIES
• MECHANICAL ENERGY
• MECHANICAL PROPERTIES
• STRAIN RATE
• THERMAL DIFFUSION
• ENERGY TRANSFER
• MATHEMATICAL ANALYSIS

Subject Categories:

• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE