Effects of sorbed water on crack propagation in poly(methyl methacrylate) under static tensile stress

Y. Bokoi, C. Ishiyama, M. Shimojo, Y. Shiraishi, Y. Higo

研究成果: Article

12 引用 (Scopus)

抜粋

Effects of sorbed water on crack propagation in poly(methyl methacrylate) (PMMA) under static tensile stress have been investigated. The specimens were kept for more than two years in temperature and humidity-controlled conditions. Sorbed water of less than 0.40 wt% scarcely affected K/th value (threshold stress intensity factor for crack propagation), however, K/th value for the specimens containing water of more than 0.40 wt% increased with the amount of sorbed water. K/th values related to the balance among the radius of the curvature of crack tip, crazing stress and craze fibril rupture stress, which are functions of the amount of sorbed water. At a crack propagation rate of more than 1×10-7 m/s, the slopes of K-da/dt curves for the specimens containing water less than 0.40 wt% were gentle, however, that for the specimens containing more than 0.40 wt% was steep; and unstably fractured. It was found that the gentler slopes for the specimens containing little sorbed water may be caused by craze-shear controlled crack propagation mechanisms, while the steeper slopes for the other specimens may be caused by a craze controlled crack propagation mechanism.

元の言語English
ページ(範囲)5001-5011
ページ数11
ジャーナルJournal of Materials Science
35
発行部数19
DOI
出版物ステータスPublished - 2000 10 1
外部発表Yes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

フィンガープリント Effects of sorbed water on crack propagation in poly(methyl methacrylate) under static tensile stress' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用