160 



NOTES ON CHAIN CABLES. 



Fig. 8, Plate 90, shows a better idea of the distribution of stress through the 

 link. At section a, lying along the minor axis, the inner fiber is subjected to a tensile 



stress of 3.55-^, while the outer fiber is under a compression 1.55— At section b, 



the tensile stress at the inner fiber is a little greater, due entirely to the curvature at 

 that section, and at section c this tensile stress is still greater, because of the sharper 

 curvature, notwithstanding the fact that the moment Mb is smaller. From here on, 

 however, the tensile stress on the inside of the line rapidly decreases and reaches 

 zero at the point L. At section e the moment Mb changes sign by passing through 

 the value zero ; hence at this section the stress is uniformly distributed and equal to 



— . From L to C the mmor fiber of the link is in compression, the intensity of the 



compression reaching its maximum value 8.453 "7 ^t the point C. From A to K 

 the outer fiber of the link is compressed, but from K to D it is in tension, the maxi- 

 mum intensity of the tension reaching the value 4.012-^ at the point D. The lines 



HK and LM indicate the points of the link at which the stress is zero. 



It will be observed that there are two points of maximum tensile stress ; one at 

 D on the outside, the other at E on the inside of the link. The compressive stress 

 in the outer fibers is small, but at the point C it is very large. 



The following table gives the stresses in the same link when provided with a 

 stud; and Fig. 9, Plate 90, shows the distribution of stress in such a link. 



