SU1601555A1

SU1601555A1 - Installation for fatigue testing of samples of materials in bending

Info

Publication number: SU1601555A1
Application number: SU884600077A
Authority: SU
Inventors: Евгений Васильевич Лодус
Original assignee: Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-10-23

Abstract

Изобретение относитс к испытательной технике. Цель изобретени - расширение функциональных возможностей путем обеспечени испытаний на усталость не только одного образца как при плоском, так и при круговом изгибе, но и пары взаимодействующих между собой образцов с чередованием нагружений плоским и круговым изгибами. Установка содержит два механизма вращени торцовых захватов 2, 3 образцов 6, 7, включающих каждый вал 10 шарового шарнира 8(9), шестерню 11 и муфту 12, св занные редуктором с приводом 13, винт 14 и пружину 15 нагружени статической силой, опоры 18,19 и механизм перемещени опор. Дл испытани пары взаимодействующих образцов винтом 14 деформируют пружину 15, св зывающую шаровые шарниры 16, 17 консольных захватов 4, 5, и создают статическую нагрузку на образцы. Включают привод 13 и муфты 12. Оба образца испытываютс при круговом изгибе с изменением соотношени плеч при перемещении опор 18, 19 механизмом, включающим винтовую пару винт 21 - гайка 22 и привод 23 вращени гайки 22. При отключении одной из муфт 12 св занный с ней образец нагружаетс изгибом в одной плоскости. 2 ил.This invention relates to a testing technique. The purpose of the invention is to enhance the functionality by providing fatigue tests for not only one sample in both flat and circular bending, but also a pair of interacting samples with alternating flat and circular bending loads. The installation contains two mechanisms of rotation of the end grips 2, 3 of samples 6, 7, including each shaft 10 of the ball joint 8 (9), gear 11 and coupling 12, connected by a gearbox with drive 13, screw 14 and spring 15 by static force, bearings 18 , 19 and the mechanism for moving the supports. To test a pair of interacting samples with a screw 14, the spring 15 is deformed, which connects the ball joints 16, 17 of the cantilever arms 4, 5, and creates a static load on the samples. The actuator 13 and the couplings 12 are turned on. Both specimens are tested under circular bending with a change in the ratio of the shoulders when the supports 18, 19 are moved by a mechanism including a screw pair of screw 21 - a nut 22 and a drive 23 for rotating the nut 22. When one of the couplings 12 is disconnected the specimen is curved in one plane. 2 Il.

Description

Фиг. 2FIG. 2

Claims

Claim

An installation for testing material samples for bending fatigue, comprising a base, end and cantilever grip of the sample, a rotational mechanism associated with cantilever grip by means of a ball joint, a static loading device and a support with a mechanism for moving it along the axis of the grip, using a second ball joint, characterized in that, in order to expand the functionality by providing tests not only of one sample both with a flat bend and with a circular bend, but and pairs of interacting samples with alternating loads of flat and circular bends, it is equipped with additional end and cantilever grips of the second sample, a second rotation mechanism associated with an additional end grip by means of a third ball joint, and designed to interact with the second sample of the second support with its mechanism displacements along the axis of an additional pair of grippers, and an additional cantilever grip by means of a fourth ball joint is connected to the loader statically th power.

Aa

FIG. 2