SEDL / STP / STP1380-EB / STP14399S

Dynamic Force Calibration for Measuring Impact Fracture Toughness using the Charpy Testing Machine

Kishimoto, K
Professors, Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, Meguro, Tokyo

Inoue, H
Associate Professor, Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, Meguro, Tokyo

Shibuya, T
Professors, Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, Meguro, Tokyo

Pages: 14    Published: Jan 2000

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Abstract

The Charpy impact test is one of the most popular techniques for assessing mechanical properties of materials under impact loading. Although many studies have evaluated the impact fracture toughness of materials by using the instrumented Charpy testing machine, there still remains difficulty in obtaining the impact force accurately. In this paper, a technique is developed to remove the effect of mechanical vibration of the instrumented hammer on the output of the sensor. Details for practical application of this technique are also presented. An application of this technique to measure the impact fracture toughness of PMMA is demonstrated. Factors which affect the evaluation of the impact fracture toughness are discussed.