Effects of Strain Rate on the Compressive Stress-Strain Loops of Several Engineering Plastics

• YOKOYAMA Takashi

  Department of Mechanical Engineering, Okayama University of Science

• NAKAI Kenji

  Department of Mechanical Engineering, Okayama University of Science

抄録

Compressive stress-strain loops of several commercial engineering plastics at strain rates of up to 600⁄s are determined using the standard split Hopkinson pressure bar. Four different engineering plastics or typical thermoplastics: PA-6, PA-66, PC and POM are tested at room temperature. Cylindrical specimens with a slenderness ratio (= length l⁄diameter d) of 0.5 are used in the Hopkinson bar tests, and those with l⁄d = 1.5 as specified in the ASTM Designation E9-89a are used in the static tests. The stress-strain loops in compression at low and intermediate strain rates are measured on an Instron testing machine. The effects of strain rate on the Young's modulus, flow stress at 2.5% strain and dissipation energy are investigated. It is demonstrated that the area included within the stress-strain loop (or dissipation energy) increases with increasing strain rate as well as given strain, that is, all plastics tested exhibit intrinsic strain-rate dependent viscoelastic behavior and a high elastic aftereffect following complete unloading.

収録刊行物

• 実験力学

  実験力学 8 (Special_Issue), s98-s103, 2008

  日本実験力学会

キーワード

• Compressive Properties
• Engineering Plastics
• Hopkinson Bar
• Strain Rate
• Stress-Strain Loops
• Viscoelasticity

詳細情報

• CRID: 1390282680166781568
• NII論文ID: 10021156117
• NII書誌ID: AA11822914
• DOI: 10.11395/jjsem.8.s98
• ISSN: 18844219
• ISSN: 13464930
• NDL書誌ID: 9568138
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9568138
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可