SU1594377A1

SU1594377A1 - Pendulum impact testing machine for testing speciment of materials in impact loading

Info

Publication number: SU1594377A1
Application number: SU884600076A
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: 1990-09-23

Abstract

Изобретение относитс к испытательной технике, в частности к ма тниковым копрам. Цель изобретени - расширение функциональных возможностей путем обеспечени испытани образцов не только при знакопосто нном нагружении, но и при повторном знакопеременном нагружении. Копер содержит ма тник в виде штанги 5 с упругой пластиной 6 и грузом 7 и нагружатель в виде рамки 9, установленной на второй штанге 8, соединенной шарнирно общей со штангой 5 осью 4 со станиной 1. При повороте ма тника замок 10 соедин ет обе штанги, стенки 11 и 12 рамки 9 нанос т повторные удары по образцу 3 в противоположных направлени х с затухающей амплитудой нагрузки. При удалении из рамки 9 стенки 12 нагружение образца повторными ударами выполн етс по одному направлению. 1 ил.The invention relates to a testing technique, in particular, to an asterine cam. The purpose of the invention is to expand the functionality by providing test samples not only under sign-constant loading, but also upon repeated sign-alternating loading. The pile driver contains a tandem in the form of a rod 5 with an elastic plate 6 and a load 7 and a loader in the form of a frame 9 mounted on the second rod 8 connected pivotally common to the rod 5 by an axis 4 with a frame 1. When the tilt is turned, lock 10 connects both rods , walls 11 and 12 of frame 9 apply repeated shocks to sample 3 in opposite directions with damped amplitude of the load. When wall 12 is removed from frame 9, repeated loading of the specimen is performed in one direction. 1 il.

Description

The invention relates to test equipment, in particular to a pendulum copra. The purpose of the invention the expansion of functional opportunities

by ensuring that samples are tested not only under constant loading, but also under repeated alternating loading. The pile driver contains a pendulum in the form of a rod 5 with an elastic plate 6 and a load 7 and a loader in the form of a frame 9 mounted on the second rod 8 connected pivotally common to the rod 5 by an axis 4 with a bed 1. When the pendulum turns, the lock 10 connects both rods 11 and 12 frames 9 apply repeated blows to sample 3 in opposite directions with damped amplitude-. loads. When wall 12 is removed from the frame 9, repeated loading of the specimen is performed in one direction. 1 il.

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The invention relates to test equipment, namely to the pendulum copra. '

The purpose of the invention is to expand the functionality by ensuring that the sample is not only tested under a sign of constant loading, and when the sign of alternating loading is repeated. Ιθ

The drawing shows the pile driver

general form.

Koper contains frame 1, size; Schenny supports on it 2 samples 3,

I pendulum with composite suspension in the form of 15

pivotally connected axis 4 with a bed 1 ". rigid barbell. 5 and fixed on its end of the elastic cantilever plate 6 with a load of 7, pivotally

ί connected by an axis 5 with a bed of a second ₂ 0 to the ruy bar 8 with a loader in the form

frame 9, fastened at its free end, lock 10, made in

: as an electromagnet and designed to connect rods 5 and 8 to 25

the moment of contact with the frame.9, and a typical device for recording the sample loading diagram (not shown).

<Koper works as follows ..

For tests with sign-change

Free loading barbell 5.

When you turn the last lock 10 connects it with the rod 8. The wall 11 of the frame 9 strikes at the sample 3.

; Under the action of the elastic plate 6 and the load 7 after the impact, both rods 5 and 8 move in the opposite direction and the wall 12 of the frame 9 hits the sample 3.

When the energy is greater than the work of destruction of the sample, the sample is destroyed with the energy transfer from the elastic plate 6. At removal

In the case of the wall 12 of the frame 9, repeated shocks are performed in one direction with the damping of the load oscillations, if the energy supply on the pendulum is less than the work of the sample destruction.

When changing the length of the plate 6 by moving it along the axis of the rod 5 and fixing the clamp 13, the loading parameters change: as the plate length decreases, the energy transferred to the sample during its destruction decreases the frequency of repeated loading. both directions.

Claims

Claim

A pendulum pile driver for testing material samples under shock loading, containing a frame, specimen supports measured on it and a pendulum with a composite suspension in the form of a rigid rod, one end of which is pivotally connected to the axis with the frame, and fixed on the rod of an elastic cantilever plate mounted on its free the end of the load, and a device for registering the loading diagram, which is distinguished by the fact that, in order to extend the functionality by providing a test of the sample, not only under constant loading, but In the case of repeated alternating loading, it is provided with a second rod pivotally connected to the axis with an axle, a loader mounted on the other end of the second rod and made in the form of a frame, the inner opposite walls of which are designed to interact with the sample, and the lock for connecting the rods one with other.