Evaluation of Dynamic Properties for Low Impedance Materials
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概要
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Various methods have been employed for evaluating dynamic characteristics of viscoelastic materials. Viscoelastic Split Hopkinson Bar (SHB) Method is one of the indirect techniques. And also, there are some direct techniques, for example, the wave propagation method. However, some limitations of the shape and size of their specimens are existed. The authors devised a direct impact method for a short specimen, and analyzed experimental data by assuming perfectly free edge reflection. Compressive and tensile waves are generated alternately, propagate in the specimen, and are superposed each other. Using Polymethyl Methacrylate (PMMA) specimens, accuracy of determined viscoelastic properties was examined by comparing the data of the wave propagation method with that of the newly devised method. It was deduced that reasonable results were obtained with the new method. The three kinds of material which the particular 3-piece golf ball was constructed of were experimented on using the new method as one example of low impedance materials. The dynamic viscoelastic characteristics of the three materials for the 3-piece golf ball are clarified respectively and can be approximated as 3-element solid models.
- 日本実験力学会の論文
日本実験力学会 | 論文
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