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Physical Mesomechanics
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Physical Mesomechanics
Article . 2020 . Peer-reviewed
License: Springer TDM
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Study on the Size Dependence of Calibration Parameters of the New Local Approach Model for Cleavage Fracture

Исследование размерной зависимости калибровочных параметров новой модели локального приближения для моделирования разрушения отрывом
Authors: Airu Shen; Peichao Li; Zhishui Yu; Guian Qian; Berto, Filippo; Wenwang Wu;

Study on the Size Dependence of Calibration Parameters of the New Local Approach Model for Cleavage Fracture

Abstract

This paper investigates whether the Weibull parameters of the new local approach model for cleavage fractures are affected by the geometric size of the specimen. Based on the fracture test data of A508-C steel, low temperature round notched bar tensile specimens of A508-C steel with two different notch sizes are numerically simulated by using finite element analysis software ABAQUS, and the stress distributions are obtained. The Weibull parameters of two notched bars are calibrated by linear regression method. The results show that the Weibull parameters of the specimens with different notch sizes are different. This suggests that the calibration parameters are dependent on the notch size.

Исследовано влияние геометрических размеров образца на параметры Вейбулла новой модели локального приближения для моделирования разрушения отрывом. С использованием результатов испытаний на разрушение стали A508-C проведено численное моделирование низкотемпературного растяжения стержней из стали A508-C с круглыми надрезами разной величины при помощи программного комплекса ABAQUS и получены распределения напряжений. Параметры Вейбулла для двух стержней с надрезом определены методом линейной регрессии. Показано различие параметров Вейбулла у образцов с надрезами разной величины, обусловленное зависимостью калибровочных параметров от размера надреза.

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Keywords

новая модель локального приближения, new local approach model, параметры Вейбулла, размер надреза, cleavage fracture, notch size, разрушение отрывом, Weibull parameters

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
hybrid