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0405U003210,
к.т.н.
21-06-2005
o
The behaviour of powders and composites under simple and complex loading and at the stage preceding the failure
Dudunov Victor Dmitrievich,
popup.head Shtern Mikhail Borysovich
popup.opponent Каташинський Віктор Петрович
popup.opponent Рудь Віктор Дмитрович
Мета роботи - формулювання такого критерію руйнування композиту, який би був чутливим як до вмісту жорстких вкраплень та їх взаємодії з порошковою матрицею, так і до шляху навантаження. Аналіз взаємодії вкраплень з пористою матрицею базується на мікромеханічному аналізі, в ході якого формулюються узагальнені матеріальні функції теорії пластичності порошкових тіл. Поряд з тим отримується залежність граничної деформації від розмірів вкраплень, що відокремлюються в процесі пластичного деформування. Встановлюється вплив зміцнення матриці на характер відокремлення вкраплень. Формулюється узагальнена модель пластичної течії порошкового композита. Використовуючи її визначальні співвідношення, а також уявлення про фізичну стійкість деформування, будується теорія руйнування композитів для схем ущільнення та формозмінення, що використовуються у порошковій металургії. Отримані результати викормстовуються як для оптимізації складу композита (розмірів вкраплень, їх вмісту) так і з метою уникнення таких шляхів навантаження, де ймовірність руйнування є високою.
2005-06-21
2020-04-04
Updated: 2025-12-07
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