Clarification of damage behavior for dissimilar friction stir welding by hybrid measurement of dissipated energy and strain

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14043
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Kobe University
• Principal Investigator: Ogawa Yuki 神戸大学, 工学研究科, 助教 (50880788)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 疲労 / 接合 / 非破壊評価 / 赤外線

Outline of Final Research Achievements

A hybrid measurement that combines the dissipated energy capturing the micro damage behavior and the strain outside the friction stir welded joint with high strength and long life. was developed to clarify the damage behavior of the joint in macro and micro levels. This study developed an evaluation method that captures the temporal variation of damage behavior caused by the complex welded structures unique to dissimilar welded joints.

Free Research Field

疲労

Academic Significance and Societal Importance of the Research Achievements

本研究で構築した評価手法により捉えた継手の損傷挙動における時間的変化を接合条件にフィードバックすることで，高強度・長寿命を実現する接合条件の最適化を実現し，マルチマテリアル構造を担う接合技術の革新を目指す．