CONTINUUM MODELS FOR DISCONTINUOUS MEDIA

A comparison of different crack models applied to plain and reinforced concrete

Numerical simulation of free edge delamination in graphite-epoxy laminates under uniaxial tension

SOLUTION METHODS FOR LOCALIZATION IN FRACTURE DYNAMICS

Some future directions in computational failure mechanics

A survey of plasticity and damage-based models for FE analysis of fracture in concrete

Fracture Analysis of Beam-Column Joints due to Bond-Slip Mechanism

In order to predict a bond-slip behavior of the reinforcement bar in inner joint in a ‘seismic’ reinforced concrete frame structure, experiments and numerical analyses were conducted. A reinforced cylinder with a centrally embedded deformed rebar served as a simple joint model. The bar was fully loaded on a protruding end. Cyclic loading was...

Constitutive parameters, mechanical properties and failure mechanism in DC-cast AA7050 billets

A testing preocedure for the evaluation of directional mesh bias

This paper presents a dedicated numerical test that enables to assess the directional mesh bias of constitutive models in a systematic way. The test makes use of periodic boundary conditions, by which strain localization can be analyzed for different mesh alignments with preservation of mesh uniformity and with exclusion of boundary disturbances...

A lattice-particle approach for the simulation of fracture processes in fiber-reinforced high-performance concrete

The use of fiber-reinforced high-performance concrete (FRHPC) is becoming more extended; therefore it is necessary to develop tools to simulate and better understand its behavior. In this work, a discrete model for the analysis of fracture mechanics in FRHPC is presented. The plain concrete matrix, made of mortar and coarse aggregates, is...

Fracture analysis of cement treated demolition waste using a lattice model

Fracture properties of cement treated demolition waste were investigated using a lattice model. In practice the investigated material is applied as a cement treated road base/subbase course. The granular aggregates used in this material were crushed recycled concrete and masonry. This results in six different types of phases in the mixture:...

Multi-scale characterization and modelling of damage evolution in nuclear Gilsocarbon graphite

In the present work, the microstructure and mechanical properties of Gilsocarbon graphite have been characterized over a range of length-scales. Optical imaging, combined with 3D X-ray computed tomography and 3D high-resolution tomography based on focus ion beam milling has been adopted for microstructural characterization. A range of small...

Environmental degradation of adhesively-bonded composite joints

Committee III.2: Fatigue and Fracture

Concern for crack initiation and growth under cyclic loading as well as unstable crack propagation and tearing in the ship and offshore structures. Due attention shall be paid to the suitability and uncertainty of physical models and testing. Consideration is to be given to practical application, statistical description and fracture control...