Abstract
This paper deals with a three-dimensional stress analysis for link chains subjected to tensile loads. The analysis was done using the finite-element method to examine the strength of the link chains. The effects of the dimensions of link chains on Misess's stress at the border between the curved part and the straight part in the link, and at the outer part, of which the inner part contacted with the inner part of the other link, were shown through numerical calculations. For verification, photoelastic experiments and measurement of strain were performed. The analytical results were in fairly good agreement with the experimental results. It was clarified that the strength of link chains can be improved by optimizing the link pitch, the link width, shape of the link section and compressed depth. Discussion is also presented on the estimation of the strength of the link chain subjected to tensile loads.
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