218 



MR ANGUS E. FULTON ON 



It is now possible to proceed to establish a connection between the extreme fibre 

 stresses at fracture point of a non-axially loaded body and the moment of the ex- 

 ternal load. 



Let the symbols A, A t , A c , T, C, t, and c have the same meaning as in the case of 

 beams, and whatever may have been the elastic distribution of stress, let the ultimate 

 distribution be a rectangular one. 



If the resultant force W was very small and L very great, then only the bending 



moment stress need be considered. For this special case, if A T and A c be the tensile 

 and compressive areas respectively, then 



~ = as before, for tA T - cA c = 0. 



If the ultimate stress reached be equal to the ultimate direct strength of the 

 material, then 



T 



t = T ; andA x=A^ 



and A r = A 



T + C 



In order to obtain the position of the neutral axis NN under this condition, we 



