Development of the multi-axial stress test machine and verification of crystal plasticity model

• Project/Area Number: 22760092
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Production engineering/Processing studies
• Research Institution: Yamagata University
• Principal Investigator: YOSHIDA Kengo 山形大学, 大学院・理工学研究科, 助教 (70436236)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 多軸応力状態 / 降伏曲面 / 塑性構成則 / 材料試験 / 電磁バルブ / 多結晶体 / 金属宴会 / ねじり / 多軸応力試験 / 結晶塑性 / 尖り点 / 金属円管

Research Abstract

A multi-axial stress testing machine for thin-walled tubular specimens has been developed in the present study. The test machine is capable of applying axial force, internal pressure and torque to a thin-walled tubular specimen. Using the testing apparatus developed in this study, the plastic deformation behavior under tri-axial stress state can be observed. This experimental evidence observed by this machine would provide meaningful information for validating the constitutive models for metals.