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SCALING CHARACTERISTICS OF STOCHASTIC DAMAGE ACCUMULATION IN BRITTLE MATERIALS

机译:脆性材料中随机损伤累积的尺度特征

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Stochastic damage evolution in brittle materials is analyzed with application of various scaling characteristics. Both temporal and spatial randomness of the process are studied. Characterization of a complicated morphology of failures is carried out in terms of a fractal approach. Effect of stochasticity extent on fractal dimension of failures and on load distribution near them is analyzed. Temporal scaling is investigated by means of transition to stochastic kinetic equations for damage accumulation. Three various type of temporal stochasticity (different variants of noise action) are studied. Introduction of a local failure criterion leads to estimation of time-to-fracture distributions under various types of stochastic action. Specific features of evolution of two different damage modes are discussed.
机译:应用各种定标特性分析了脆性材料中的随机损伤演化。研究了过程的时间和空间随机性。复杂的故障形态的表征是通过分形方法进行的。分析了随机程度对破坏的分形维数和对它们附近的载荷分布的影响。通过过渡到破坏累积的随机动力学方程来研究时间尺度。研究了三种不同类型的时间随机性(噪声作用的不同变体)。引入局部失效准则可以估算各种随机作用下的断裂时间分布。讨论了两种不同损伤模式演变的特定特征。

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