SU1493923A1 - Device for loading samples in mechanical testing - Google Patents

Abstract

This invention relates to the field of strength testing. The purpose of the invention is to increase the reliability of testing by axial load of cylindrical specimens of fragile materials by additional centering of the specimen. The device consists of an elastic chamber of annular shape, fixed in a fixed base. The chamber is connected by a pipeline to the cavity of the loading cylinder and is in contact with the loaded and lateral surfaces of the sample. The movement of the hydraulic ram plunger causes the sample to be loaded with an axial load due to the hydrostatic pressure transmitted by the elastic chamber to the sample. At the same time, an additional centering of the sample is carried out due to elastic restoring forces transmitted to the sample along its side surface through the walls of the elastic chamber. 1 il.

Description

1st

WITH

with

to. with

Iloorsp NS refers to strength tests,

lU .ib of the invention increasing the reliability of the axial load testing of cylindrical specimens of fragile materials with a scare (D) H (). 1pit.1.1 about the centering of the specimen.

On hours () tszhe njXMCTaB. iena scheme for testing samples.

Ustr () 11stvo contains elastic chambers 1, formed in the form of a ring and fixed in a fixed base 2 with the help of mandrels 3. Chambers 1 are connected by a pipe (| D () m 4 with a nschlost) guide |) otsi; 1indra 5, plunger ) t) of which is connected with the load- 1TsNM drive (not shown in the drawing).

In coaxial () TWE stp x 7 bases, azcep specimen 8, loadable overhead 9 n side surfaces 10 kotorog () konkagr k) g with last band 1) 1. chambers 1. Inserts 1 I B1,1 troughs two symmetrical plates with a zero: n pivp cutouts and P1) are single-valued to (for avoiding camouflage) s 1 in the axial direction. Probes 12 and a 1: 5 gauge are predetermined (started to measure cooTBiTC I due to deformation and axial force on the specimen.

Set) 01K-tvo works in the same way.

 H, moving, creates a distributor in: .1stasty kams |) ah I, which is equal

It acts on the loading surfaces 9 of the sample, creating an axial load on its lateral surfaces 10, keeping it axially.

With resuscitating effects on the sample in the radial direction, due to the elastic forces of the chambers 1 under pressure, a restoring force arises, which is why the center axis of the sample takes on additional centering of the sample within the radial gaps between the sample and the base in 7 and 7 thereby increasing the test performance.

 {formula of invention

N cTpoiicTBo for the purpose of specimen preparation with mehanchchechnyh tests, containing a stationary base, plastic chamber, fixed in a non-fixed base and designed for interaction with the sample, n pag) hydraulic cylinder, 1) with a P () M ( ) A pipeline with a plastic chamber, characterized in that, in order to improve the reliability of testing axial loads of pi. Fine specimens of circular materials with shoulders by q () along the front of the specimen, the chamber was made in the front section and was designated for cover nor about the azts and interaction with the shoulders.

Claims (1)

The claims ¹⁵ A device for loading samples during mechanical tests, comprising a fixed base, an elastic chamber fixed in a fixed base and designed to interact with 20 different ways, and a loading hydraulic cylinder communicated through a pipeline with an elastic chamber, characterized in that, in order to increase the reliability of the axial tests load of cylindrical samples 25 of brittle materials with shoulders by additional centering of the sample, the chamber is made in the form of a ring and is designed to cover sample and interaction with the shoulders.