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Method of Measure and Evaluation for the Mechanical Characteristics of Running Shoes
Sadayuki Ujihashi CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.1
Running shoe sole has an important role to absorb the external impact forces that transmitted from the runningsurface. Especially, the impact force occurred on the runner's heel is about 3 times of the runner's weight. Therefore the purpose of in this paper is to show the method of measurement and evaluation for the mechanical characteristics of shoe sole. The impact device used in the trials, is made by considering the collision conditions between human heel and the running surface. It means the maximum impact force is about 2kN, the impact velocity is 1m/s and the duration time of load is about 20 to 40 ms. Tosatisfy all the conditions,we proposed a drop-weight type testing system with an accurate measuring devices, A variety of commercial running shoes were chosen randomly for the trials, to check up the validity of the testing system. From the measurement, the mechanical porperties of each shoe, including the maximum impact force, maximum deformation, rate of energy absorption, average Young's modulus, etc, are extracted to evaluate the individual cushioning characteristics. At the same, the human sensory evaluation of each shoe was done to compare with the mechanical measurement. As the result, by observing the similar tendencies of these two evaluation that we have obtained. It is obviously that the mechanical measurements have definite correlations with human senses.