Accession Number : ADA141866

Title :   Identification of Strain-Softening Properties and Computational Predictions of Localized Fracture.

Descriptive Note : Annual rept. Aug 82-Feb 84,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF CIVIL ENVIRONMENTAL AND ARCHITECTURAL ENGINEERING

Personal Author(s) : Willam,K J ; Sture,S ; Bicanic,N ; Christensen,J ; Hurlbut,B

PDF Url : ADA141866

Report Date : 01 Mar 1984

Pagination or Media Count : 191

Abstract : The main objective of the present investigation is to evaluate strain-softening formulations for contained fracture in cementitious materials such as concrete and geo-materials. This report includes two principal developments: a rational approach to identify softening properties due to tensile cracking and frictional slip from displacement controlled material testing, and a systematic verification of contained fracture computations from small-scale structural testing. To this end, a composite damage model is proposed to describe the degradation of strength and stiffness in the post-peak regime with the aid of a volume fraction formulation of localized damage within a finite element.

Descriptors :   *Cements, *Concrete, *Fracture(Mechanics), *Softening, *Strain(Mechanics), *Structures, *Computations, Mathematical prediction, Finite element analysis, Cracking(Fracturing), Crack propagation, Tensile properties, Modulus of elasticity, Shear stresses, Plastic deformation, Displacement, Degradation, Rupture, Mechanical properties, Structural response, Equations, Test methods

Subject Categories : Ceramics, Refractories and Glass
      Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE