OS1111 超音波共振法による固体酸化物形燃料電池の残留応力評価(実験力学における最近の進歩,オーガナイズドセッション)

概要

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Solid-oxide fuel cells(SOFC) are expected to be one of the most effective and clean energy sources because of their highest efficiency and simple system, SOFC is consisted of three layered structures: anode, electrolyte and cathode. In order to guarantee their long-term durability, it is important to comprehend stress state in the cell. In this study, the residual stress is evaluated by using X-ray diffraction and also a method of resonant ultrasound spectroscopy (RUS). The residual stress in the electrolyte of the anode-supported cell measured by X-ray diffraction was a compressive stress of about 675MPa. Based on the results, the residual stress distribution in the cell was simulated using the finite element method, followed by the modal analysis. The natural frequency of the cell decreased by 0.84 % when the simulated compressive stress in the electrolyte increased to about 526 MPa, which could suggest a validity of the RUS for evaluating the residual stress in the cell.
一般社団法人日本機械学会の論文
2009-07-24