| 固体材料脆性断裂的多尺度时空模型(英文) |
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| 引用本文： | PETROV Y V,BRATOV V. 固体材料脆性断裂的多尺度时空模型(英文)[J]. 宁波大学学报(理工版), 2012, 0(1): 35-40 |
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| 作者姓名： | PETROV Y V BRATOV V |
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| 作者单位： | 圣彼得堡国立大学;俄罗斯科学院机械工程研究所 |
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| 基金项目： | Supported by the National Natural Science Foundation of China(11032001);Russian Foundation for Basic Research(11-01-91217) |
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| 摘 要： | 通过实例分析了动态断裂过程所固有的典型动态作用,基于断裂孵化时间理论的时空结构方法提出了固体材料断裂的统一解释.此外,还提出了计及尺度效应的广义断裂模型,该模型可以用于预测准脆性非均质材料的多尺度断裂,并证明此模型基于实验室尺度的实验数据可以预测更高尺度(真实尺度)的宏观断裂.
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| 关 键 词： | 孵化时间准则 动态断裂 动态强度 断裂韧性 时空离散化 多尺度 裂纹扩展 管道 有限元建模 |
Spatio-temporal Model of Multiscale Fracture in Brittle Solids |
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| Affiliation: | PETROV Y V 1,2 ,BRATOV V 1,2 (1.Saint Petersburg State University,Saint Petersburg 198504,Russia;2.Inst Probl Mech Engng of the Russian Academy of Sciences,Saint Petersburg 199178,Russia) |
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| Abstract: | We analyze examples illustrating typical dynamic effects inherent in dynamic fracture process, and we propose a unified interpretation for fracture of solids utilizing structural-temporal approach based on the concept of the fracture incubation time.Corresponding generalized model accounting for fracture scale level will also be presented.The model will be used to predict fracture of quasi-brittle heterogeneous materials on different scale levels.It will be demonstrated that can give a possibility to predict fracture on a higher(real)scale level and having experimental data obtained on a lower(laboratory)scale level. |
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| Keywords: | incubation time criterion dynamic fracture dynamic strength fracture toughness spatio- temporal discretization scale levels crack propagation pipelines FEM modelling. |
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