Development of TMA based nanoindentation creep test procedure and evaluation of long-term viscoelastic properties at elevated temperature

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560112
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Tokyo Denki University
• Principal Investigator: TSUJI Hirokazu 東京電機大学, 工学部, 教授 (10163841)
• Co-Investigator(Kenkyū-buntansha): KOBAYASHI Takashi 沼津工業高等専門学校, 機械工学科, 教授 (10161994)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: インデンテーション試験 / クリープコンプライアンス / シール材料 / 弾性体・粘弾性体の対応原理 / 時間－温度換算則 / フランジ締結体

Outline of Final Research Achievements

Indentation creep test was carried out using TMA with Berkovich indenter to evaluate the viscoelastic characteristics of sealing products. The time-temperature superposition principle was applied to obtain the master curve of the creep compliance of gasket material at elevated temperature. The elastic-viscoelastic correspondence principle was also applied to estimate the gasket creep strain in the flanges from the master curve of the creep compliance. Gasket creep strain rate can be predicted at an elevated temperature for a long term of 10 years. Estimation of the gasket creep strain rate in the flanges shows a good agreement with the experiment data.

Free Research Field

機械工学，機械材料・材料力学