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Creep deformation test method and platform of full-dimension pipeline bend

A pipe elbow and creep test technology, applied in the research field of creep mechanical behavior of materials under large-scale complex stress conditions

Inactive Publication Date: 2014-04-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a large-scale experimental platform to solve the problems of load application, heating method and strain acquisition during the multi-axial creep experiment of high-temperature components

Method used

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  • Creep deformation test method and platform of full-dimension pipeline bend
  • Creep deformation test method and platform of full-dimension pipeline bend
  • Creep deformation test method and platform of full-dimension pipeline bend

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Experimental program
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Embodiment Construction

[0019] The method of using the full-scale pipeline elbow multi-axis creep experiment system in the present invention will be described below in conjunction with the implemented steps.

[0020] (1) Put the gantry frame (attached figure 1 Middle 1) Push it to an easy-to-operate place and lock the casters (attached figure 1 Medium 4);

[0021] (2) Use the manual lifting device on the gantry frame (attached figure 1 In 2) the sample (attached figure 1 5) Lift and place the sample in the working position;

[0022] (3) Put the sports platform (attached figure 1 Middle 6) Move to a position suitable for installing the sample;

[0023] (4) Pass the sample and connecting parts through the hinge pin (attached figure 1 Middle 11) The connection is firm, and the sample is separated from the manual lifting device;

[0024] (5) Loosen the casters of the gantry frame and move the gantry frame out of the working position;

[0025] (6) Install the parts required for heating and data co...

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Abstract

The invention relates to a creep deformation test method and platform of full-dimension pipeline bend. The invention is suitable for researching creep deformation mechanical behavior of non-standard sample with heavy gauge. A loading which is more than 200 kN is realized by servo motor, leading screw and guide rail slide block. A force transducer senses stress relaxation, and controls running of the motor, thereby realizing quasi-steady stress loading. A ceramic heater is used for heating and thermostatic control of the pipeline bend. Data acquisition is completed by a high temperature strain gauge, which is used for dynamic acquisition of strains at different directions. The invention can be used for full-dimension high temperature creep deformation test of high temperature part, and research of creep deformation damage mechanism of high temperature part under the state of multiaxial stress, thereby overcoming uncertainty of result brought by using creep deformation experiment result of miniaturization sample to evaluate a real member.

Description

technical field [0001] The invention relates to a creep test method and platform for a full-scale pipeline elbow, belongs to the technical field of analysis and measurement control, and is suitable for research on the creep mechanical behavior of materials under large-scale complex stress conditions. Background technique [0002] Traditional creep experiments generally use standardized specimens (GB / T 2039-2012 uniaxial tensile creep test methods for metal materials), mainly to study the creep process under unidirectional stress. In the actual industrial production process, especially in the power and petrochemical industries, most high-temperature components work under complex stress conditions. The safety assessment of high-temperature components under multiaxial stress conditions cannot be performed with the results of traditional uniaxial experiments. [0003] The invention can conduct full-scale experiments on actual power plant pipes or other stressed parts. The diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/28
Inventor 倪永中穆岱于洋
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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