Ductile Materials under Combined Stress. 



109 



Table V.— Solid Bar Tests. 

 Elastic Limit. 



Material. 



Test 



No. 



P. 



W. 



P- 



f- 



Max. 



Shear. 



Max. 



Elongation. 



Norwegian Iron . 

 „ 



Mild Steel 



1 

 2 



3 

 4 

 5 



6 



1 

 2 



5000 

 5000 

 6700 

 8000 



6750 



30 



20 

 30 



48 



22 



16,200 

 16,200 

 21,700 

 26,000 



33,900 



9,000 



6,180 

 9,270 



14,800 



13,100 



9,000 

 8,100 

 10,200 

 14,300 

 13,000 

 14,800 



13,100 

 16,950 



0000403 S 



0-000554 



0-00064 



000088 



0-00083 



0-000865 



0000582 

 0-001065 





3 









Yield-point. 



Material. 



Test 

 No. 



P. 



w. 



P- 



20,700 

 16,200 



</• 



Max. 



Shear. 



Max. 

 Elongation. 



0-00055 



0-000698 



0-00087 



Norwegian Iron . 



1 

 2 

 3 

 4 

 5 

 6 



6400+ 

 5000 



40 

 424 



12,360 

 13,100 



12,360 

 10,350 

 15,300 





8200 



59 



26,500 



18,200 



13,250 

 18,200 



0-000892 

 0000815 



Mild Steel 



1 

 2 

 3 



8000 

 6000 



38 

 35 



40,200 

 30,100 



22,700 

 20,900 



22,700 

 20,100 

 25,800 



0-001007 

 0-001265 

 0-00142 









The above elongations are calculated from the stresses and elastic constants, 

 thus assuming that the linear stress-strain relation holds to the yield-point ; 

 the actual strains at the yield-point are greater : e.g., the max. elongation at 

 W=40 in Test 1 on the Norwegian iron was at first 0000587 and increased to 

 0-000606. 



