Fluid/Material Coupled Numerical Simulation of a Bubble Collapse Near a Wall for Laser Cavitation Peening

Yuka Iga, Chieko Kuji, Hirotoshi Sasaki, Hitoshi Soyama

研究成果: 書籍の章/レポート/Proceedings会議への寄与査読

抄録

An impact of a bubble induced by a submerged pulsed laser is utilized for improvement of fatigue strength of metallic materials. As the bubble induced by the pulsed laser behaves like a cavitation bubble, the laser induced bubble is called as “laser cavitation”. The mechanical surface treatment using the laser cavitation impact is named as “laser cavitation peening”. At laser cavitation peening, the impact induced by laser cavitation collapse strongly depends on the bubble geometry. There are two typical mode at the bubble collapse. One mode is “microjet mode”, at which bubble develops near the target and is collapsed with generating a microjet in the bubble. The other mode is “hemispherical mode”, at which a hemispherical bubble develops on the target surface and is collapsed on the surface. As the bubble collapse of microjet mode is interesting phenomenon, a lot of researchers investigate “microjet mode”. However, impact induced by “hemispherical mode” is significantly larger than that of “microjet mode”. In the present paper, to optimize laser cavitation peening condition, a fluid/material coupled numerical simulation of a bubble collapse near a wall was carried out changing with standoff distance from wall. It was revealed that the equivalent stress induced by hemispherical mode was larger than that of microjet mode.

本文言語英語
ホスト出版物のタイトルProceedings of the 3rd International Conference on Advanced Surface Enhancement (INCASE) 2023 - Surface Engineering for Sustainability
編集者Niroj Maharjan, Niroj Maharjan, Wei He
出版社Springer Science and Business Media Deutschland GmbH
ページ309-314
ページ数6
ISBN(印刷版)9789819986422
DOI
出版ステータス出版済み - 2024
イベント3rd International Conference on Advanced Surface Enhancement, INCASE 2023 - Singapore, シンガポール
継続期間: 2023 9月 252023 9月 27

出版物シリーズ

名前Lecture Notes in Mechanical Engineering
ISSN(印刷版)2195-4356
ISSN(電子版)2195-4364

会議

会議3rd International Conference on Advanced Surface Enhancement, INCASE 2023
国/地域シンガポール
CitySingapore
Period23/9/2523/9/27

フィンガープリント

「Fluid/Material Coupled Numerical Simulation of a Bubble Collapse Near a Wall for Laser Cavitation Peening」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル