光弾性法による走行部下の応力分布について (第3報)

鋼車輪踏面にゴムをはりつけた場合

抄録

In this paper, the force equilibrium acting on a driven wheel with rubber attatched to the periphery of the tread was analysed theoretically and experimentally by means of photoelasticity. As the result of these discussions, the following items were pointed out.
1) In the experiments, the deflection of rubber attatched to the periphery of tread of the driven wheel should be considered. Therefore in discussing the torque of the wheel about the axle, the effective radius of rotation of the wheel should be used.
2) The attatchment of rubber to the periphery of the wheel makes it similar to the wheel model for actual use. However the load on axle of the wheel was well distributed and it is a little difficult to read out the fringe order in taking the isochromatic line diagram. Harder rubber woued be better for use in the photoelastic experiment like this.
3) An extended octagonal force transducer was used to measure the horizontal force (F-y)=|Dr|. The measured values coincided well with the calculated results obtained from the photoelastic experiments.
4) It seemed impossible to apply computed results directly to the actual wheel, because some factors such as the deflection of tire and the soil deformation were involved.
5) The angle θ expressing the acting point of the resultant reaction force X' from the ground in compressing zone, was 15 degrees.
6) In determining the magnitude of the tangential reaction force τ and F₁' the equations (6) and (22) were used for the cases shown in Fig. 1 and Fig. 3 respectively.