Modeling of the Damage Accumulation and Fracture: Structural-Statistical Aspects

Lepov, Valeriy; Иванова, А. Д.; Achikasova, Valentina; Lepova, Kiounna

doi:10.4028/0-87849-440-5.809

Cited by 4 publications

(4 citation statements)

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“…Обобщенный структурный подход трактует изменение структурного размера d в процессе развития процессов накопления повреждений как различие механизмов разрушения на различных масштабах [14]. На макроскопическом уровне d определяется по данным квазистатических испытаний образцов с трещинами и в соответствии с критерием Нейбера-Новожилова (2) может быть выражен через статическую вязкость разрушения и прочность по простой формуле:…”

Section: обоснование и построение моделиunclassified

Physical Modeling of Brittle Crack Growth for dynamic impact on one-edge tension specimen

2019

ASNR

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Предложена модифицированная модель роста динамической трещины в вязкоупругом материале на основе структурного подхода, включающего термокинетическую концепцию С.Н. Журкова и критерий хрупкого разрушения Нейбера–Новожилова. Подход учитывает неоднородную микроструктуру материала и позволяет моделировать стадийность развития трещины, выявляемую фрактографическими исследованиями. Дан анализ основных параметров физически обоснованной модели, апробированной на данных эксперимента по импульсному расклиниванию образцов из полиметилметакрилата с острым боковым надрезом, нагружаемых статическим растяжением в широком диапазоне климатических температур.

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Section: обоснование и построение моделиunclassified

Physical Modeling of Brittle Crack Growth for dynamic impact on one-edge tension specimen

2019

ASNR

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“…rack mechanics is a subject involving macro crack growth rule and quantitative analysis [15], but mechanical effects of inevitable microdefects which have existed before macro cracks are not included. In wood, a large amount of original microdefects such as pit, crack on cell wall and interface damage will gradually evolve or emerge into macro crack under load.…”

Section: Process Of Damage Crack On Woodmentioning

confidence: 99%

Damage of bamboo and wooden materials based on linear elastic fracture mechanics in garden design

Tang¹

2015

Frattura Ed Integrità Strutturale

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Bamboo and wood are the most widely applied and the oldest natural structural materials in the world. Currently, worldwide output of wooden material is 1 billion ton, almost the same as steel. Most of them are used as structure, such as load carrying girder, scaffold, floor and support. Wooden materials and bamboo materials with clear microstructure are composite biomaterials which can be studied under multiple scales. Irregular evolution behaviors of initial defects or damage during loading determines macro mechanical behavior of wooden and bamboo materials. Taking wood and bamboo as test materials, this study explored mechanical characteristics and damage crack behavior of wood and bamboo as well as toughening mechanism.

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“…It is seen that before the extensive macroscopic plastic deformation the surface relief change and the microcracks is appeared on the 3D-images and profiles. The damaging has been numerically estimated by the methods of multifractal analyses of the scanned images [5]. The multifractal specter parameters calculation has been performed for the equal areas (100 × 100 pixels or 580 × 580 nm) in grain boundary zone for the (a) initial state, and for the steps on deformation curve -(b) 1500, and (c) 1650 N (see fig.…”

Section: Experimental Researchmentioning

confidence: 99%