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Destructive Test of Cantilever Plate Boom
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English
Abstract
The designer of a hydraulic box-type boom must attempt to meet the requirements of a capacity chart with load ratings that are as large as possible. To accomplish this, the boom structure must be made as light as possible.
To check the validity of known calculation methods for the buckling of cantilevered plate booms, the second section of the boom was manufactured to 0.4184:1.0000 scale. This was done because the physical size of the boom section would have presented difficulty in destructive testing.
The boom section was strain gaged by loading on a test stand in exactly the same way as an actual section under normal conditions. The section was tested to destruction. It was found that the failure was initiated in the bottom plate (near the lower pad) as a result of plate buckling in compression closely followed by failure of the vertical plates in buckling caused by the bending and shear force.
This test verifies the use of the proposed SAE calculation method for plate booms and suggests some possible modifications to account for corner stiffeners.
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Citation
Bonesteel, O., "Destructive Test of Cantilever Plate Boom," SAE Technical Paper 740699, 1974, https://doi.org/10.4271/740699.Also In
References
- “USS Steel Design Manual.” United States Steel Corp. ADUSS 27-3400-01 July 1968 70 105
- “Steel for Machine Design.” United States Steel Corp. ADUSS99-3162-01 1967
- “Design Manual for Higher Strength Steel.” United States Steel Corp. ADUSCO-02215 1962 46 53
- “Proposed SAE Calculation Method for Cantilevered Plate Booms.” SAE X J1078 Method of Analytically Determining the Competence of Telescopic Cantilevered Crane Booms
- SAE Recommended Practice, Cantilevered Boom Crane Structures-Method of Test SAE J1063, SAE Handbook 1975