616 



PIPPAKD AND CHITTY ON EXPERIMENTS ON THE 



that no stretching of the shell occurs, it is a matter of simple geometry to 

 obtain the relations 



d _ gsing 



a 1 — cos 6' 



h sind — 6 cos 

 lo"" 1 — cos ■ 



The possibility of such an inextensible distortion was demonstrated by 



Taylor by a model made from a single sheet of 



paper which is shown at (a) in Fig. 2. It will be 



shown that that hypothesis was justified by the 



results of tests, both static a^d dynamic, made on 



the small cylinders. 



Fig. 1. 



Test Apparatus. 



The apparatus designed for the main tests is 

 shown in Fig. 3. The cylinder to be t/Csted, as 

 already stated, was bedded in sifted sand to half 

 its diametral depth, the sand box resting on the 

 heavily reinforced concrete base of a compression 

 machine which was originally built for testing slabs. Loads were applied 

 by an inverted hydraulic jack which was modified to prevent oil leakage 



Symbols used in 

 Tayloe's Hypothesis. 



Fig. 3. 



DispUccmei 



Bearing pomi for Amei dul 



■::... 



Abranoembnt of Apfabatus roB Main Tests. 



