Abstract

This paper deals with mechanical response of material against small impact force using levitation mass method (LMM). Material properties observed by evaluate deformation of material and force acting on the material. In LMM, the force acting on the material is generated by collision of a levitated mass which has very small friction. The impact Force and deformation of material which cause of the collision is accurately measured by optical interferometer. A dynamic impact force, less than 10 N are applied to the three types of material. The mechanical response of material is indicated by time of collision, W hv and ratio of loss energy. It shows stiffness properties and elasticity level of material, respectively.

Highlights

  • The general method used for material testing that is evaluating a force that applied to a material using a force transducers and the deformation of material (1-3)

  • The inertial force is generated by a levitated mass which collides to material or force transducers under tested

  • Mechanical response of a piece of paper has been observed with micro-Newton level of impact forces, whose maximum value was approximately 2 mN

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Summary

Introduction

The general method used for material testing that is evaluating a force that applied to a material using a force transducers and the deformation of material (1-3). There are no accepted standard methods available for dynamic method for force calibration and material testing at present. Fujii has developed a method that well known as Levitation Mass Method (3, 4) In this method, the inertial force is generated by a levitated mass (moving part) which collides to material or force transducers under tested. The micro-Newton level force generated using a small capacity of linear bearing (8) Using this method, mechanical response of a piece of paper has been observed with micro-Newton level of impact forces, whose maximum value was approximately 2 mN. The evaluation a dynamic mechanical response for the stiff material in small impact force has not been conducted. This paper describes an evaluating of mechanical response of solid material against impact force using a levitation mass method

Experimental Setup
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