Constant and fatigue stress testing device and testing method

A technology of fatigue stress and testing equipment, which is applied in the direction of measuring equipment, testing material strength by applying stable tension/pressure, testing material strength by applying repetitive force/pulsation force, etc. Well simulate the damage process of structural parts and other problems to achieve the effect of solving the problem of synergy

Active Publication Date: 2018-07-13
NO 59 RES INST OF CHINA ORDNANCE IND
View PDF18 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this device can be used for long-term exposure tests in outdoor atmospheric environments, it cannot apply fatigue alternating stress, nor can it simulate the damage process of structural parts well.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Constant and fatigue stress testing device and testing method
  • Constant and fatigue stress testing device and testing method
  • Constant and fatigue stress testing device and testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Constant, fatigue stress test apparatus, such as figure 1 As shown, it includes a workbench, a transparent frame is set on the workbench table 5, and a clamping part 6 for fixing the specimen is set on the frame, and the clamping part 6 is connected to the axial stress loading system. The axial stress loading system It includes a force sensor 6, a lead screw 7 and a servo motor 8 that are sequentially arranged in the worktable. The force sensor 6 is located between the clamping portion 6 and the lead screw 7 to detect the magnitude of the mechanical load loaded. One end of the lead screw 7 connects the force The other end of the sensor 6 and the lead screw 7 is connected to the output end of the servo motor 8 ; the input end of the servo motor 8 is connected to the control system that controls the operation of the servo motor 8 .

[0033]The control system includes a control cabinet 10, and a digital controller 11 is arranged in the control cabinet 10. The digital contr...

Embodiment 2

[0042] In order to facilitate further understanding of the environment-constant, fatigue stress synergistic test method of the present invention, the environment-stress synergy test is described in detail by taking a dumbbell-shaped tensile specimen as an example.

[0043] The sample is a dumbbell-shaped tensile sample with a straight section of 20 mm × 1.5 mm, and the sample is vertically fixed between the upper and lower clamping parts.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a constant and fatigue stress testing device and a testing method. The testing device comprises a worktable, wherein a transparent framework is arranged on a tabletop of the worktable; the framework is provided with a clamping part for fixing a test piece; the clamping part is connected with an axial stress loading system; the axial stress loading system comprises a force sensor, a screw rod and a servo motor, which are arranged in the worktable in sequence; the force sensor is located between the clamping part and the screw rod; one end of the screw rod is connected with the force sensor and the other end of the screw rod is connected with an output end of the servo motor; the servo motor is connected with a control system. The testing method comprises the followingsteps: firstly, placing the testing device in a natural environment; then mounting the test piece on the clamping part of the testing device; applying constant stress and / or fatigue stress on the test piece, so as to realize a cooperative effect on the test piece by environment and dynamic loads. A damaging process on a structural part can be simulated and reappeared relatively well.

Description

technical field [0001] The invention relates to a device and method for damage assessment of structural parts, in particular to a constant and fatigue stress test device and a test method for simulating the environmental damage process of structural parts under natural environment conditions. Background technique [0002] Structural parts will be affected by various environmental factors in the actual use process, and are always in a certain corrosive environment, for example, wet and accompanied by SO 2 , Cl - Environmental factors such as corrosive media will have a significant impact on structural parts, causing structural corrosion damage. When the structural parts are in use or running, especially when the working stress is far less than the allowable stress, the structural parts are prone to sudden fracture damage or premature failure, especially for the key stressed structural parts of aviation, military products and bridges , once a sudden fracture damage occurs, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/38G01N3/08
CPCG01N3/08G01N3/38G01N2203/0003G01N2203/0005G01N2203/0017G01N2203/005G01N2203/0073G01N2203/024G01N2203/0268
Inventor 苏艳钟勇舒畅杨万均朱玉琴封先河罗来正吴帅滕俊鹏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap