ゴムの破壊機構に関する研究　ＸＩＶ　　ゴムの破壊過程の研究　６　　加硫ゴムの疲労破壊での限界応力と伸び

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書誌事項

タイトル別名
  • STUDY ON FAILURE MECHANISM OF RUBBER VULCANIZATES (XIV)
  • ゴム ノ ハカイ カテイ ノ ケンキュウ 6 カリュウ ゴム ノ ヒロウ ハカ
  • 加硫ゴムの疲労破壊での限界応力と伸び

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説明

Stress and strain at fatigue failure of carbon black filled SBR and NR vulcanizates have been examined for various loading conditions.<br>For SBR systems, stress and strain for fatigue failure resemble for the failure envelope of the vulcanizates at various temperatures and the fatigue life is not much affected by the lower stress or the static stress. However, for NR system, stress and strain for fatigue deviates from those for the failure envelope and the fatigue life is highly dependent on the lower stress or the static stress.<br>To interpret these data the higher order structure of the sample is assumed to affect the conditions for the unstable fracture of the system. Namely, one part of the higher order structure may be transformed to more randomized structure with increase in entropy and the other part may be transformed to more ordered or oriented structure with decrease in energy. The fatigue failure may be dominated by the overall structure of the system.

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