【摘要】 本文和下文试图用非平衡统计的概念和方法建立微观机理和宏观特性相结合的脆性断裂理论。 本文给出了微裂纹的演化方程,讨论了微裂纹长大的位错机理,求得了长大的动力学方程和长大速率,探索了断裂韧性的微观物理基础和表达式,解得了微裂纹分布函数。更多还原

【Abstract】 In papers (Ⅰ) and (Ⅱ), by means of nonequilibrium statistical concepts and methods, the author tries to construct a theory of brittle fracture to connect microscopic mechanism with microscopic properties.The microcrack evolution equation is given. The dislocation mechanism of microcrack growth is discussed. The dynamic equations of microcrack growth and expressions for the growth rate are obtained. The microscopic physical foundation and mathematical formulae of fracture toughness are investigated and the microcrack distribution function is derived.更多还原