Yield Mode Transition at Constant Strain Rate Shear in Amorphous PET
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- KITAGAWA Masayoshi
- Dept. of Human & Mechanical Systems Eng., Kanazawa Univ.
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- FUJISAKI Ayumu
- Kanazawa Univ.
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- SUGANUMA Daisuke
- Kanazawa Univ.
Bibliographic Information
- Other Title
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- 非結晶性ＰＥＴ材のせん断試験における降伏様式の遷移
- ヒケッショウセイ PETザイ ノ センダン シケン ニ オケル コウフク ヨウシキ ノ センイ
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Abstract
In order to investigate yielding in amorphous polymers, shear and tensile tests have been performed in the conventional ranges of strain rate and temperature using amorphous samples. In the serial study, when the experiments on the effect of strain rate on yield stress have been executed at room temperature using amorphous polyethylene terephthalate (PET) samples, the yield mode was discovered to change drastically at a critical strain rate. In this paper, this yield mode transition was investigated at shearing. It was shown that 1.there were two different yield modes, (a) yielding governed mainly by localized shear bands (; LSB mode) and (b) yielding by diffuse slip lines (; DSL mode) and 2.while the LSB mode appeared in the case where the strain rate was high and the temperature was low, the DSL one occurred where the strain rate was low and the temperature was high.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 56 (2), 178-181, 2007
The Society of Materials Science, Japan
