Abstract
Lange and Evans have shown that the “line tension effect” caused by second phase dispersions in a brittle matrix usually increases its strength and toughness. In this paper crack bowing between particles and fibres in a brittle matrix are observed by computer simulation. The contribution of line tension to stress intensity factor and strength-to-fracture dependence on volume fraction and obstacle penetrability are also studied. The effect of this toughening mechanism is greater in particulate composites than in fibre reinforced materials.
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