Novel anisotropic continuum-discrete damage model capable of representing localized failure of massive structures. Part II: identification from tests under heterogeneous stress field

TL;DR

This paper presents a method to identify parameters of a new anisotropic damage model for massive structures, using tests under heterogeneous stress fields to better predict localized failure.

Contribution

It introduces an inverse optimization approach to calibrate the damage model from complex experimental data involving heterogeneous stress conditions.

Findings

Successful parameter identification from bending tests

Model accurately predicts localized failure

Enhanced understanding of damage evolution in structures

Abstract

In Part I of this paper we have presented a simple model capable of describing the localized failure of a massive structure. In this part, we discuss the identification of the model parameters from two kinds of experiments: a uniaxial tensile test and a three-point bending test. The former is used only for illustration of material parameter response dependence, and we focus mostly upon the latter, discussing the inverse optimization problem for which the specimen is subjected to a heterogeneous stress field.