第 1 部 (18) 光学顕微鏡と画像処理によるゴム変性 PMMA のダメージゾーン形状測定

概要

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Tensile testing of rubber-modified PMMA specimen with notch was carried out using a compact tensile testing machine with use of an optical microscope. Thus, in-situ observation of damage zone developed in the vicinity of the notch-tip can be performed using this system. Damage zone development at each load level was recorded using a digital camera, and it was then analyzed in PC using an image analysis software. Load-displacement curves were also recorded using a digital recorder, and then rates of energy dissipation due to damage zone formation and crack growth were analyzed. Energy release rate G_I was also evaluated using a conventional formula with use of the load-displacement curve. Experimentally determined energy dissipation rate was the compared with the conventional G_I.
2003-03-27