caa a22 4500 465741207 CHVBK 20180323111809.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00013218 doi (NATIONALLICENCE)springer-10.1007/BF00013218 Broberg K. Solid Mechanics, Lund Institute of Technology, Box 118, S-221 00, Lund, Sweden aut Computer demonstration of crack growth [Elektronische Daten] [K. Broberg] Crack growth is simulated by means of a simple demonstration program. The fracture mechanism is assumed to consist of hole formation, growth and coalescence. This sequence is visualized on a PC-screen. Holes are assumed to be opened at particles. Several far-reaching simplifications are made, but the following features are taken into account: 1. Holes are opened when the ambient stress reaches a critical value, dependent on the size of the particle. 2. Hole growth occurs under a simple viscosity rule. 3. Hole coalescence takes place when the distance between two holes (or one hole and the main crack) becomes smaller than a certain critical distance. 4. Hole opening and growth causes decreasing stress in the neighbourhood. Several parameters can be varied: 1. Particle average size, size distribution and spacing. 2. Stress intensity factor (SIF). 3. Relation between stress required for hole opening and hole growth. 4. Smoothness of the macroscopic near-tip stress field. The results turn out to be about the expected ones. For SIF below a certain level (only approximately determinable because of randomized particle distribution) sustained crack growth does not occur. For SIF slightly above this level crack growth occurs at a low velocity and involves only one succession of holes. At a substantially higher SIF the velocity as well as the energy dissipation in the process region becomes higher since many more holes are involved. Kluwer Academic Publishers, 1990 International Journal of Fracture Kluwer Academic Publishers 42/3(1990-03-01), 277-285 0376-9429 42:3<277 1990 42 10704 https://doi.org/10.1007/BF00013218 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00013218 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Broberg K. Solid Mechanics, Lund Institute of Technology, Box 118, S-221 00, Lund, Sweden aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 42/3(1990-03-01), 277-285 0376-9429 42:3<277 1990 42 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer