Long-time creep fixture

A fixture and creep technology, applied in the field of permanent creep fixtures, can solve the problems of aggravating the uneven force of the sample, deviation from the deformation of the sample, and increasing the test cost, so as to avoid the failure of test data, accurate test results, The effect of reducing test costs

Inactive Publication Date: 2014-03-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shoulder connection method has the problem of uneven force
The inhomogeneity of the force leads to the imbalance of the loading coaxiality, which leads to a large difference in the measurement count of the extensometer and deviates from the actual deformation of the sam

Method used

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Embodiment Construction

[0020] The technical solution of the present invention is described in further detail below with reference to the accompanying drawings and embodiments:

[0021] Such as Figure 1~4 As shown, the fixture includes:

[0022] A cylindrical jig body used to connect with the testing machine and bear the tensile load from the testing machine. The jig body has a column 1 whose outer surface is a circular arc segment on both sides of the radial direction, and the inner surface of the column 1 is vertical. In the radial plane, the upper end of the column 1 is integrated with the upper cover 2 of the fixture body. The upper part of the upper cover 2 is a solid cylinder 3 connected to the testing machine, and the lower end of the column 1 is connected to the ring body 4 at the bottom of the fixture body. Connected into one body, the inner edge surface of the torus 4 is tangent to the inner surface of the column 1;

[0023] Two arc-shaped seat covers with the same structure, the seat co...

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Abstract

The invention provides a long-time creep fixture, comprising a cylindrical fixture body and two arc-segment-like seat covers with a same structure, wherein the cylindrical fixture body is connected with a tester and bears tensile load from the tester, two radial sides of the fixture body are respectively provided with a column (1) which has an arc-segment-like outer side surface, the inner side surface of each of the columns (1) is a plane perpendicular to the radial direction, the upper ends of the columns (1) are connected with the upper cover (2) of the fixture body so as to form an integral body, the upper part of the upper cover (2) is a solid cylinder (3) connected with the tester, the lower ends of the columns (1) are connected with a circular ring body (4) located at the bottom of the fixture body so as to form an integral body, each of the two arc-segment-like seat covers comprises a larger-diameter arc upper edge (5) and a smaller-diameter arc lower edge (6), and the arc upper edge (5) and the arc lower edge (6) are stagger and are connected through an arc cylinder, which enables the longitudinal section of the seat cover to form a zigzag shape. The long-time creep fixture prevents adhesion between the fixture and a specimen, realizes uniform loading and helps to reduce cost of testing.

Description

technical field [0001] The invention is a durable creep fixture, which belongs to the technical field of mechanical performance testing. Background technique [0002] As we all know, durability and creep are used to describe the performance of materials to withstand constant load for a long time under high temperature conditions. In order to obtain the durability and creep strength of the material, the material should be processed into a durability and creep specimen and loaded into a durability and creep testing machine for durability and creep testing. Endurance and creep testing machines are generally equipped with clamps for securing the specimens to the testing machine. [0003] Between conventional permanent and creep specimens and fixtures, threaded connections are usually used to evenly transfer the applied load to the working section of the specimen through the threads. However, there is a problem of high temperature bonding in this threaded connection. That is, ...

Claims

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Application Information

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IPC IPC(8): G01N3/04
Inventor 于慧臣李影
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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