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Идентификация модели деформирования меди для задач динамики удара

Идентификация модели деформирования меди для задач динамики удара

Abstract

На примере меди осуществлено математическое моделирование поведения материала при высокоскоростном деформировании, при этом особое внимание уделяется адиабатичности этого процесса. Описана процедура подготовки динамических экспериментальных диаграмм деформирования для идентификации математических моделей, описывающих упруго-пластические свойства конструкционных материалов. В качестве примера проводится идентификация модели Джонсона-Кука для меди М1. Полученная модель верифицируется с использованием результатов специального натурного эксперимента, показано хорошее качественное и количественное совпадение результатов испытания и расчетов.

Using the example of copper, we consider the specific features of high strain rate deformation of structural metals and alloys, with special attention to the adiabatic nature of such processes. A correction procedure is described for preparing dynamic stress-strain curves to be used in model identification of elasto-plastic mathematical models. As an example, the Johnson-Cook equation of state is identified for M1 copper. This model was verified using special experimental procedures with good qualitative and quantitative agreement between the experimental and numerical results.

Keywords

ДИНАМИЧЕСКОЕ ДЕФОРМИРОВАНИЕ,НАПРЯЖЕНИЕ ТЕЧЕНИЯ,АДИАБАТИЧЕСКИЙ РАЗОГРЕВ,МОДЕЛЬ МАТЕРИАЛА,СКОРОСТНОЕ УПРОЧНЕНИЕ,ТЕМПЕРАТУРНОЕ РАЗУПРОЧНЕНИЕ,ПЛАСТИЧЕСКАЯ ДЕФОРМАЦИЯ,ИДЕНТИФИКАЦИЯ,ВЕРИФИКАЦИЯ

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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
bronze