Mooring chain fatigue strength testing method

A technology of fatigue strength and test method, which is applied in the direction of testing the strength of materials by applying repetitive force/pulsation force, and can solve the problem of no test method being proposed.

Inactive Publication Date: 2012-07-04
JIANGSU ASIAN STAR ANCHOR CHAIN
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However, only the acceptance criteria are proposed in the rules of

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  • Mooring chain fatigue strength testing method
  • Mooring chain fatigue strength testing method
  • Mooring chain fatigue strength testing method

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[0006] The present invention will be further described below in conjunction with accompanying drawing:

[0007] The test method for the fatigue strength of mooring chains is characterized in that: one test needs to include three groups of samples, consisting of 7 common mooring chain links, 3 for routine tests, and the rest for supplementary tests after test failures; At least 6 Kent shackles or 6 D-type shackles for each loading test; all samples including connectors must be numbered and cannot be marked in the bending ring area; all samples including connectors must be in accordance with the requirements of the classification society Carry out mechanical tests, and the test results must meet the requirements of the classification society; all samples, including connectors, need to be inspected visually, magnetic particle and ultrasonic after the tensile test and cleaning, and the inspection results must meet the relevant requirements of the classification society; Before, al...

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Abstract

The invention relates to a mooring chain fatigue strength testing method. Three groups of samples are needed for single test; three of the seven common mooring chain rings are used for the common test, and the other four common mooring chain rings are used for the supplementary test after the failed test. All the samples comprise connectors, and serial numbers need to be carved on the connectors. All the samples comprise the connectors, and mechanical testing needs to be carried out according to the classification society requirements. All the samples comprise the connectors, and the visual detection, the magnetic particle detection and the ultrasonic detection need to be carried out after the tension test and the cleaning are carried out. Before performing shot blasting, all the chain rings and the connectors need to be checked to find out scratches, burrs or other surface defects. A loading unit approved by the classification society is used for measuring. The mooring chain fatigue strength testing method comprises the steps of recording upper load limit and lower load limit, recording testing frequency and recording fatigue testing times. The test result meets the requirements of the classification society and the international standard, and the mooring chain fatigue strength test method is improved to be more perfect.

Description

technical field [0001] The invention relates to a test method for the fatigue strength of an ultra-high-strength mooring chain. Background technique [0002] The high-strength anchor chain is an important mooring positioning part for the development of marine resources, the development of marine shipping and coastal defense construction, and has a vital impact on the safety of marine operations. Since the chain has been soaked in seawater for a long time and the conditions are harsh, it is required not only to have high strength and good toughness, but also to have properties such as seawater corrosion resistance, fatigue resistance, and wear resistance. Among them, anti-fatigue performance is a particularly important performance index, and all major classification societies have clearly put forward the requirement that manufacturers conduct research on fatigue performance of products. However, only the acceptance criteria are proposed in the rules of the classification soc...

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Application Information

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IPC IPC(8): G01N3/32
Inventor 陶安祥陶良凤张卫新郎宏军李剑张明邵云亮朱乔良
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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