Elasticity of Bending, Bending Strength, Forces on Bearing. 



305 



52 181. 1 : 14. 



52 182 A. 1:10. 



52 182 B. 1 : 10. 



52183. 1:18. 



One half of the crank-shaft is taken forward, the other half being again brought to a state of 

 equilibrium in the original position by the introduction of single forces and couples, after removing 

 the bearing, so that all forces present and their action can be plainly demonstrated. 



52.181. Bending Model (Prof. Eugen Meyer's), Figure, for demonstrating the deformation 

 of a bar by submitting it to bending: consisting of a bar formed of a number of parts 

 held together by springs which when loaded on one side form the elastic line as a poly- 

 gonal line (Ztschr. d. V. d. I. 53, 1909, pp. 1301 et seq., No. 5, and text-sheet 13, 

 Figs. 1315) 



Instead of using the steel springs a brass spring can be used whose coefficient of expansion is 

 greater than that of the steel springs, so as to be able to analyse the conditions in the bending of 

 cast iron bars. Wood bars can be placed on the model which become as tangents on the elastic line 

 or which give the direction of the radius of curvature of the elastic line. 



52.182. Crankshaft with moving parts, as suggested by Prof. E. Meyer, Figs. A and B, 

 for explaining the deformation of a crankshaft (Ztschr. d. V. d. I. 53, 1909, pp. 1301 

 et seq., No. 6, and text-sheet 14, Figs. 16 22) 



The model is provided with joints at the sections" to be considered, so that the deformations 

 caused by all the prevailing forces can be shown separately. 



52.183. Apparatus for Determining the Statically Indefinite Forces on a Bearing, on a bar with 

 three bearing surfaces, as suggested by Prof. E. Meyer, Figure (Ztschr. d. V. d. I. 53, 

 1909, pp. 1301 et seq., No. 7, and text-sheet 14, Figs. 2325) 



We will assume that the magnitude of the bearing force in the centre of the bar loaded as in 

 the illustration with P, and P is to be determined. The centre bearing is taken away and the sag 

 caused in the middle is measured by PI and P 2 ; PI and P 2 are then shifted and a force W is applied 

 to the centre which tends to bend the bar in an upward direction just as much as it was bent down- 

 wards by P, and P 2 . If P,, P, and P 3 are applied simultaneously the resultant deflection is obtained 

 from the algebraic sum of both at zero. 



s. d. 



6.15.0 



5. 5.0 



4.10.0 



Complete description of Prof. Eugen Meyer's models on application. 



Cl. 5643, 5641, 



5646, 5651. 20 



