Fracture Measurement of a Light-Cured Resin Composite under Impact Tensile Loading
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概要
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The fracture behavior of a light-cured resin composite under impact tensile loading was studied using single-edge-cracked specimens fabricated by packing the composite between two rectangular plates of polymethyl methacrylate (PMMA). The impact load and displacement were measured with a piezo sensor and a high-speed extensometer, respectively. The load and displacement diagram, <I>i.e.</I> the external work applied to the specimen was partitioned into three parts: the elastic energy left in the fractured specimen, the nonelastic energy due to viscoplastic deformation and the fracture energy for creating new surfaces. The energy release rate <I>G</I><SUB>f</SUB> was then estimated using the fracture energy in the composite and PMMA specimens. The results indicated that, although the value of <I>G</I><SUB>f</SUB> in both materials increased with the fracture load, they showed different increasing behaviors.
- 一般社団法人 日本機械学会の論文
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