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Контактные напряжения в эллиптическом рабочем инструменте машины для разрушения негабаритов

Контактные напряжения в эллиптическом рабочем инструменте машины для разрушения негабаритов

Abstract

Работоспособность инструментов ударного действия при контактном взаимодействии и протекании деградационных процессов усталостного характера в значительной степени зависит от напряженно-деформированного состояния (НДС) поверхностного слоя пар трения, формируемого при изготовлении, и динамики его изменения в процессе работы. Прочность горной породы является основным показателем, который определяет конструктивные параметры рабочего инструмента и энергоемкость процесса разрушения. Основными прочностными характеристиками для большинства горных пород являются прочность на сжатие, сдвиг, растяжения. Отсюда следует важный вывод, что наиболее эффективными будут те машины, у которых при взаимодействии рабочих органов с массивом горной породы в нем (массиве) возникают напряжения сдвига или растяжения. В работе приводится расчет контактных напряжений в эллиптическом рабочем инструменте машины для разрушения негабаритов. Методом конечных элементов производится проверка достоверности полученных уравнений. Приводятся результаты расчетов, которые подтверждают адекватность модели.

Operability of instruments of shock action at contact interaction and course the degradatsionnykh of processes of fatigue character substantially depends on the intense the deformed state (IDS) of a blanket of couples of the friction formed at production, and dynamics of its change in work process. Durability of rock is the main indicator which determines design data of the working tool and power consumption of process of destruction. The main strength characteristics for the majority of rocks are durability on compression, shift, stretchings. From here the important conclusion follows that the most effective will be those cars which at interaction of working bodies with the rock massif in it (massif) have shift or stretching tension. In work calculation of contact tension is given in the elliptic working tool of the car for destruction of not dimensions. The method of final elements makes check of reliability of the received equations. Results of calculations which confirm adequacy of model are given.

Keywords

КОНТАКТНЫЕ НАПРЯЖЕНИЯ, ПРОЧНОСТНЫЕ ХАРАКТЕРИСТИКИ, НЕГАБАРИТЫ ГОРНЫХ ПОРОД, РАДИУС КРИВИЗНЫ, КОНСТРУКТИВНЫЕ ПАРАМЕТРЫ, УСИЛИЯ, ПЛОЩАДКА КОНТАКТА, РАБОЧИЙ ОРГАН, МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ, НАПРЯЖЕННО-ДЕФОРМИРОВАННОЕ СОСТОЯНИЕ (НДС), АДЕКВАТНОСТЬ МОДЕЛИ, СONTACT TENSION, INTENSE THE DEFORMED STATE (IDS)

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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
gold