書誌事項
- タイトル別名
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- Effect of Molecular Weight and Orientation on Fatigue Crack Propagation of Polyimide Resin.
- ポリイミド ジュシ ノ ヒロウ キレツ シンテン トクセイ ニ オヨボス ブンシリョウ ト ハイコウ ノ エイキョウ
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説明
The effects of molecular weight and orientation on crack propagation property of polyimide (PI) are investigated. The specimens which have four kinds of molecular weight (Mw) from 2.5×104 g/mol to 3.8×104 g/mol are prepared. The crack propagation resistance increased with increasing Mw. The discontinuous crack growth (DCG) bands were observed on the fracture surfaces except for that of the specimen with the highest Mw. The reason that the DCG disappears for high Mw is attributable to the decrease of ductility. The width of DCG bands is almost constant until transition of DCG to continuous crack growth. The critical craze stress for cyclic loading given by Dugdale model decreases with the increase of Mw since the damage of the craze region is accumulated until breaking down. From the results of miniature CT specimens, the crack propagation resistance increased when the direction of crack propagating was perpendicular to the orientation of PI molecular chains.
収録刊行物
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- 日本機械学会論文集A編
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日本機械学会論文集A編 65 (639), 2293-2298, 1999
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282679423175808
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- NII論文ID
- 110002375164
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- NII書誌ID
- AN0018742X
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- ISSN
- 18848338
- 03875008
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- NDL書誌ID
- 4921300
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDLサーチ
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- CiNii Articles
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- 使用不可