A continuum damage model for the quasi-static response of brittle materials

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:7031946

Chen, E P ^[1]; Tzou, D Y ^[2]

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1. Sandia National Labs., Albuquerque, NM (USA)
2. New Mexico Univ., Albuquerque, NM (USA). Dept. of Mechanical Engineering

An isotropic continuum damage theory which accounts for the degradation of material strength under quasi-static loading conditions has been developed in the present investigation. The damage mechanism in this theory has been selected to be the interaction and growth of subscale cracks. The development of the theory follows closely the strain-rate dependent dynamic model advanced by the first author and his coworkers. Briefly, the cracks are activated by the maximum principal tensile strain and the density of activated cracks is described by a Weibull statistical distribution. The moduli of a cracked solid derived by Budiansky and O'Connell are then used to represent the global material degradation due to subscale cracking. Two additional material constants have been introduced in this model. These constants are determined from uniaxial tensile test data. The model has been implemented into a finite element code. Sample calculations involving the uniaxial and biaxial responses of plain concrete panels are presented to demonstrate the utility of the model. 7 refs., 2 figs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7031946
• Report Number(s): SAND-90-0541C; CONF-9006122-1; ON: DE90007681
• Resource Relation: Conference: International conference on micromechanics of failure of quasi-brittle materials, Albuquerque, NM (USA), 7-8 Jun 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MATERIALS
MATHEMATICAL MODELS
BRITTLENESS
CONCRETES
CRACK PROPAGATION
DAMAGE
ELASTICITY
FINITE ELEMENT METHOD
FRACTURE MECHANICS
STRAIN RATE
STRESSES
BUILDING MATERIALS
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
TENSILE PROPERTIES
360603* - Materials- Properties
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties
990200 - Mathematics & Computers