TALBOT S SHEARING TEST. 



1G9 



ioo.*Shearing Tests by Professor Talbot. Some recent 

 shearing tests, made by Professor Talbot, of Illinois, are 

 interesting, both as regards his methods and the results 

 obtained. The specimens tested were subjected to both 

 single and double shear. The apparatus used is shown on 

 Fig. 80. That marked a is for single shear tests, and con- 

 sists, as will be seen, of two plates of steel caused to slide 

 close to one another by means of a pair of bolts working 



a FIG. 80. b 



in slotted holes. Pairs of holes are provided for taking in 

 1 in., f in., and | in. test pieces. The loads are applied in 

 a tension testing machine. A similar piece of apparatus 

 is used for double shear, as shown at b. These test plates 

 were of tool steel of 35 tons per square inch tensile strength. 

 The testing machine used w r as one by Olsen. It was found 

 that little perceptible distortion took place in the holes of 

 the test plates. 



The following table gives the principal results of 

 shearing tests made upon rivet material, of which the 

 tensile strength was also determined. 



The figures given in the table are taken from the 

 actual published results, but are here given in tons instead 



* See "Mechanical Engineer," Sept. 3rd, 1898. 



