Strength and failure of synthetic webbing of unitizing sling assemblies in the initial state and after overloading

The results of full-scale tests of unitizing multiple-leg sling assemblies loaded with a trapezoidal waveform are considered. Mechanical behavior of the sling webbing material was evaluated by comparing its strength in the initial state and after overloading. A parameter to estimate the damage accum...

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Bibliographic Details
Published in:Strength of materials 2004-03, Vol.36 (2), p.134-139
Main Authors: SKRIPCHENKO, V. I, STRIZHALO, V. A, ZEMTSOV, M. P, BORODII, M. V
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
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Summary:The results of full-scale tests of unitizing multiple-leg sling assemblies loaded with a trapezoidal waveform are considered. Mechanical behavior of the sling webbing material was evaluated by comparing its strength in the initial state and after overloading. A parameter to estimate the damage accumulated in the polymer material held under load is proposed, which makes it possible to determine the residual strength of the webbing at a known loading history. Under cyclic loading of slings the webbing strength markedly deteriorates, which leads to a decrease in the actual value of the sling safety factor. Design calculations of lifting capacity for unitizing sling assemblies should be performed with regard for- the breaking force of their webbing tested after overloading.
ISSN:0039-2316
1573-9325
DOI:10.1023/B:STOM.0000028303.47438.c0