Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device

A technology of laser shot peening and fretting fatigue, which is used in the application of repetitive force/pulsation force to test the strength of materials and the preparation of samples for testing.

Active Publication Date: 2016-01-20
JIANGSU UNIV
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing laser shot peening strengthening material anti-fretting fatigue performance test has a single force direction and cannot fully reflect the actual s

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
  • Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device
  • Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device
  • Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example one.

[0040] Such as Figure 1-5 Shown.

[0041] A comparative test method for laser shot peening to improve the anti-fretting fatigue performance of materials, the specific steps are:

[0042] 1) Laser shot peening is performed on the entire circumferential side area of ​​the sample 1 to be tested to form an enhanced shot peening area 13. As a test comparison, a non-surface-treated area is reserved at its axial adjacent position as a test comparison Area 14, such as image 3 Shown

[0043] 2) Such as figure 2 As shown, the micro-motion pads 2 are respectively arranged in the two test areas, and the inner arc radius is equal to the radius of the round rod sample 1. The four semi-circular toroidal micro-motion pads surround the two test areas. The axial distance between the micro-motion pads is 5~10mm;

[0044] 3) The pressed metal sheet 3 is in close contact with the semi-circular toroidal micro-movement pad 2. When clamping, the position of the semi-circular toroidal...

Example Embodiment

[0051] Example two

[0052] Such as Figure 1-3 Shown.

[0053] A sample clamping device for comparison test of laser shot peening to improve the anti-fretting fatigue performance of materials, such as figure 2 As shown, it includes: it includes a semi-circular toroidal micro-motion pad 2, a pressing metal sheet 3, a force measuring element 4, a screw 5, a main clamping block 6, a main tension pin 7, a pin 8, and a secondary clamping block 9. Auxiliary tensioning pin 10, positioning washer 11 and threaded rod 12, one of the two sets of semi-circular toroidal micro-motion pads 2 is closely attached to the laser shot area 13 on the surface of the round rod sample 1, and the other is tight Paste on the test contrast area 14 (such as image 3 ), the distance between the two sets of semi-annular micro-motion pads 2 is 5~10mm, the two semi-annular pressing metal sheets 3 are mounted on the two sets of semi-annular micro-motion pads 2 in a dislocation, one is pressed against the metal ...

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

PropertyMeasurementUnit
Spot diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Widthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a contrast test method for improving the fretting fatigue resistance performance of a material by laser shot blasting strengthening and a test sample clamping device. The device comprises a clamping device, a compacting metal sheet, a force measurement element, circular ring surface micro mats, a test sample subjected to surface modification and the like. The method comprises the following steps: firstly, laser shot blasting strengthening is performed on the side surface region of the whole circumference of a round bar test sample to be tested, a test region which is not subjected to any treatment is retained at an axial adjacent position for contrast, the four circular ring surface micro mats surround the two test regions in a fitting manner, and the compacting metal sheet applies a controllable uniform contact load to the micro pads through the clamping device. Under the surface-surface contact tension-torsion composite fatigue test condition with the same test parameter, the device can realize a contrast between the non-treated region and the region subjected to laser shot blasting strengthening on the fretting fatigue resistance performance according to crack generation and expansion situations of the round bar test sample in different test stages.

Description

technical field [0001] The invention relates to a material modification technology, especially a laser surface strengthening and fretting fatigue test technology, specifically a comparative test method and sample clamping method for improving the anti-fretting fatigue performance of materials by laser shot peening device. Background technique [0002] At present, in the fields of aerospace, automobile manufacturing, shipbuilding, etc., most of the key parts serve in complex and diverse environments such as mechanical vibration, alternating fatigue loads and thermal cycles, which will lead to bolted connections, riveting, dovetail connections and Interference fit and other methods to fasten the contact parts produce a relative displacement with a displacement of tens of microns - fretting. Under the action of normal load, fretting on the contact surface will generate tangential alternating stress, resulting in the initiation and propagation of fretting fatigue cracks. Frett...

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): G01N3/32G01N1/28
Inventor 黄舒王作伟盛杰周建忠徐苏强章海峰王宏宇孙云辉
Owner JIANGSU UNIV
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