Brittle Matrix Composite Structures

Rostislav Chudoba Abedulgader Baktheer

Outline

The course is divided into three blocks related to detailed theoretical and experimental description of (1) bond, debonding process, anchorage, (2) crack initiation and propagation, and (3) multiple cracking, matrix fragmentation process under elementary loading conditions. Each of these aspects is first treated in an abstract way using theoretical and numerical methods. The general part is followed with examples of particular types of material components and practical tasks related to the either material development, design & dimensioning or safety assessment of structures.

Date # Lecture Notes Slides Examples
2018-04-11
1 Introduction
What material components are considered? What composites can be designed? What are the key questions in the material design? How to characterize the material behavior? What experimental and theoretical methods and numerical tools will be applied to address these questions? What structural configurations will be considered? What design concepts will be derived?
2018-04-18
2 Bond - pull-out
How to identify the bond law? How to design a test for the calibration of the bond characteristics? What kinds of tests are there? Which tests are appropriate for steel-reinforced concrete, carbon fibers?
2018-04-25
3 Bond - nonlinear behavior
Extend the scope of the bond slip law from constant to bilinear. Indicate how the numerical finite element tool solve the problem. Study the effect of bond-slip law with hardening and softening. What is its effect on the pullout response. Introduce the issue of anchorage length.
2018-05-02
4 Bond - unloading and reloading
What is the difference between damage and plastic behavior of a material point? What idealization of material structure can lead to a particular type of material behavior.
2018-05-09
5 Bond - pullout with inelastic bond behavior
Explain the the effect of inelastic behavior on the pullout response. Can the amount of damage or plasticity governing the bond behavior be distinguished based on the results of the pullout test.
 
2018-05-16
6 Crack: softening and fracture
Introduction to energetic treatment of material disintegration, process zone, energy evaluation.
 
2018-05-23
- ---
   
2018-05-30
7 Crack - crack band and numerical implemnetation
Chain of elements and strain - localization, lack of objectivity. Correspondence between fracture energy, softening function and damage function.
 
2018-06-06
- ---
   
2018-06-13
8 Crack - smeared representation in numerical models
Effect of element size, implementation issues related to softening problems.
 
2018-06-20
9 Crack - propagation of a straight crack
Bending test as an example of a stable crack propagation that can be applied to determine fracture energy
 
2018-06-27
10 Failure and yield conditions in 2D and 3D
How to translate the models introduced so far into a two and three dimensional continuum
   
2018-07-04
11 Seminar work presentations I
Reports on papers dealing with experimental and numerical studies of pull-out behavior of steel and FRP. Presentation of results and their interpretation using the modeling approaches presented in the BMCS course.
   
2018-07-11
12 Seminar work presentations II
Reports on papers dealing with experimental and numerical studies of pull-out behavior of steel and FRP. Presentation of results and their interpretation using the modeling approaches presented in the BMCS course.
 
2018-07-18
13 Exam
Exam
 
2018-07-20
+1 Exam
   

TeachCourseForm
title Brittle Matrix Composite Structures
lecturer RostislavChudoba
assistents AbedulgaderBaktheer
outline The course is divided into three blocks related to detailed theoretical and experimental description of (1) bond, debonding process, anchorage, (2) crack initiation and propagation, and (3) multiple cracking, matrix fragmentation process under elementary loading conditions. Each of these aspects is first treated in an abstract way using theoretical and numerical methods. The general part is followed with examples of particular types of material components and practical tasks related to the either material development, design & dimensioning or safety assessment of structures.
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