Cracking and toughness of concrete and polymer-concrete dispersed with short steel wires
Abstract
Models for quantitative description of the fracture processes occurring in fiber reinforced brittle solids are discussed. Experimental measurements of cracking stress and toughness for two brittle fibrous composites are compared with the theoretical predictions. The two brittle matrices are concrete and concrete impregnated with polymethyl methacrylate reinforced by discontinuous (short) high strength steel wires. It involved extracting a single steel wire from each brittle matrix to evaluate the debonding stress and pull-out stress as a function of fiber embedded length. These key material parameters and the energetics of cracking determined in three-point flexural experiments, together with the cracking and toughening equations are then used to characterize the fracture behavior of fiber strengthened concrete and polymer-concrete composites.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1981
- Bibcode:
- 1981STIN...8233578P
- Keywords:
-
- Concretes;
- Fiber Composites;
- Polymethyl Methacrylate;
- Wire;
- Crack Initiation;
- Crack Propagation;
- Fracture Strength;
- Mathematical Models;
- Reinforcement (Structures);
- Steels;
- Stress Measurement;
- Toughness;
- Engineering (General)