﻿Fig. l.-Average Curves showing the effect of combined tension 



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Fig. 2. — Average dm rs slm-wing tiieelleels of combined tension and 

 torsion on thin Steel tubing. Average thicliness 005 in. 



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. 6,— Curves showing lowering .if elastic limit of Steel i 



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Fig. 3. — Average Curves showing the effects of combined tension i 

 torsion on Steel tubing. Average thickness - 25in. 



Phil. Mag. Ser. 6, Vol. 12, PI. VIII. 



r^fiT^T?™ 3 f°™S the effect »*' combined torsion aud tension on — 

 (1) Modulus of ela-dieMv; (!') Unit ehiiiralioii at Hie elastic limit- (3\ 

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Fig. 4.— Curve showing lowering of elastic limit of 

 Steel in tension, due to combined stresses. 



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