SU1756802A1

SU1756802A1 - Arrangement for testing specimens of materials under application of repeated multi-axial load

Info

Publication number: SU1756802A1
Application number: SU904813373A
Authority: SU
Inventors: Евгений Васильевич Лодус
Original assignee: Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела
Priority date: 1990-04-11
Filing date: 1990-04-11
Publication date: 1992-08-23

Abstract

Изобретение относитс к испытани м образцов материалов нг прочность. Цель изобретени - расширение функциональных возможностей установки путем обеспечени испытаний при синхронном возбуждении затухающих колебаний на- грузюл как непрерывно по всем ос м нагру- жени , так и дискретно по отдельным ос м нэгружени с интервалами времени между нагружени ми, кратными периодам циклов нагружени . Установка содержит захваты 2 образца 3, пружины 8 с гибкими т гами 7, кольцевую платформу 4 с приводом 5, и инерционный груз 6, кольцевую направл ющую Юс каретками и выдвижные упоры 12, 13 При поворотах платформы 4 упоры 12,13 смещают каретки с т гами 7 и посредством пружин 8 нагружают образец по всем ос м. При отключении отдельных упоров 12, 13 каретки смещаютс только в одном направлении либо через несколько циклов нэгружени . 2 ил.The invention relates to the testing of samples of materials ng strength. The purpose of the invention is to expand the functionality of the installation by providing tests with simultaneous excitation of damped oscillations of loads both continuously across all load axes, and discretely along individual load axes with time intervals between loads multiplied by periods of load cycles. The installation contains grippers 2 of sample 3, springs 8 with flexible rods 7, an annular platform 4 with a drive 5, and an inertial load 6, an annular guide using carriages and retractable stops 12, 13. gami 7 and by means of springs 8 load the sample along all axes. When the individual stops 12, 13 are disconnected, the carriages are displaced only in one direction or after several loading cycles. 2 Il.

Description

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Claims

Claim

Installation for testing material samples under cyclic multiaxial loading, comprising a housing, sample grips and a loading device including an annular platform, concentric grippers, a platform rotation drive, an inertial load connected to the platform, flexible rods according to the number of grips, one end of each of which binds the corresponding capture with the other end of the corresponding flexible rods, and guides of flexible rods mounted on the housing, distinguishing with the fact that, in order to expand functionality by ensuring tests during synchronous excitation of damped load oscillations both continuously along all loading axes, and discretely along individual loading axes with time intervals between loadings that are multiples of the periods of loading cycles, it is equipped with an annular guide mounted concentrically on the platform, mounted on the last carriages, and installed on the platform, in pairs of radially movable stops according to the number of carriages intended for periodic interaction with the corresponding Roethke restricted their displacement along the ring rail, the other ends of the flexible rods are fixed to the respective carriages, and inertial load is fixed on the annular platform.