On Measurement of Young's Modulus by Lateral Vibration of Cantilever

Abstract

In this paper, the apparatus for measuring Young's modulus, the effect of holding, and results under various states of specimens are discribed. To obtain Young's modulus by vibration method is one of the best ways in many cases, for its accuracy and simple operation. But by lateral viblation of cantilever, the holding of the specimen is a important subject. The specimen has a small round section, and its one end is held by the holder. The vibration is generated electrically by a low frency oscillator, and transformed into mechanical vibration, therefore, the frequency and the amplitude of the forced vibration are varied easily. Using the apparatus, the author studied the effects of holding pressure and the dimension of the specimen etc, and obtained the error caused by holding is less than the error caused by the other effects. The relation between the maximum amplitude and the natural frequency when the specimen resonates, and the stress caused by vibration are theorically annalysed or experimentally studied.