INVESTIGATION OF RESIDUAL STRESS FIELD IN THE CURVED SURFACE OF ROUND ROD SUBJECTED TO MULTIPLE LASER SHOCK PEENING

Autor:	Yu Yuanchao, Xingquan Zhang, Jinxiu Fang, Yuande Yin, Niu Wenwu, Syed Sohail Ahmad Shah
Rok vydání:	2021
Předmět:	Surface (mathematics) Materials science Field (physics) Peening Surfaces and Interfaces Condensed Matter Physics Laser Surfaces Coatings and Films law.invention Shock (mechanics) Residual stress law Materials Chemistry Composite material
Zdroj:	Surface Review and Letters. 28:2150029
ISSN:	1793-6667 0218-625X
DOI:	10.1142/s0218625x21500293
Popis:	Laser shock peening (LSP) was employed to squeeze compressive residual stress (CRS) into the curved surface of the round rod with diameter of 16[Formula: see text]mm. The residual stress field was induced by nine laser shots irradiating at different locations along the specified path. The developing process of the residual stress field was investigated with finite element analysis, and the corresponding experiments were also carried out to validate the calculated results. Results demonstrate that multiple LSP with 50% overlapping rate can result in residual stress field with the maximum CRS varying from 155.2[Formula: see text]MPa to 198.8[Formula: see text]MPa along the direction of the rod axis. The peened surface appears wavy in shape and the maximum depth of plastic deformation in the curved surface is 13.41[Formula: see text][Formula: see text]m. The value of surface roughness increases from 3.87[Formula: see text][Formula: see text]m to 4.65[Formula: see text][Formula: see text]m.
Databáze:	OpenAIRE
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