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Динамический критерий трещиностойкости конструкционных сталей при квазихрупком разрушении

Динамический критерий трещиностойкости конструкционных сталей при квазихрупком разрушении

Abstract

В статье показано, что трещиностойкость конструкционных сталей при квазихрупком разрушении можно определить путем анализа диаграмм нагрузка-деформация и фрактографического анализа излома цилиндрических образцов с острым кольцевым надрезом, испытанных на растяжение. Полученный динамический критерий трещиностойкости (ДКТ) G соответствует критическому сопротивлению продвижения трещины Gс, вычисляемому через коэффициент интенсивности напряжений Кс согласно концепции линейной механики разрушения. Использование ДКТ является наиболее корректным способом определения работы развития трещины, определяемой в настоящее время путем испытаний на ударную вязкость призматических образцов с предварительно нанесенной усталостной трещиной.

In article it is shown that the fracture toughness of structural steels with quasigroups destruction can be determined by analyzing the charts load-deformation and factographic analysis of fracture cylindrical samples with sharp ring cut tested on strength. Retrieved dynamic criterion of fracture toughness (VCT) G corresponds to the critical resistance promotion cracks GC, calculated through the stress intensity factor KS according to the concept of linear fracture mechanics. The use of VCT is the most correct way to determine the work of development of cracks, determined at present by testing for impact strength prismatic samples with pre-applied fatigue crack.

Keywords

ТРЕЩИНОСТОЙКОСТЬ,CRACK RESISTANCE,ГРИФФИТС,GRIFFITHS,КРИТЕРИИ РАЗРУШЕНИЯ,CRITERIA OF DESTRUCTION,КВАЗИХРУПКОЕ РАЗРУШЕНИЕ,QUASIGROUPS DESTRUCTION,ВЯЗКО-ХРУПКИЙ ПЕРЕХОД (ВХП),VISCO-BRITTLE TRANSITION (VHP),ПЛАСТИЧЕСКАЯ ДЕФОРМАЦИЯ,PLASTIC DEFORMATION,УПРУГАЯ ЭНЕРГИЯ,ELASTIC ENERGY,ФРАКТОГРАФИЯ,FRACTOGRAPHY

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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