Influence of multiple laser impacts on thin leading edges of turbine blade

Abstract

Laser shock peening is a mechanical surface improvement treatment used to enhance the fatigue life of critical components. This paper investigates the influence of multiple square laser impacts to study their special effect on the diverse mechanical behaviours of the thin leading edge surface of turbine blades. Most works existing in the literature have presented experimental investigations. The originality of our paper is to validate and numerically simulate the proposed model. Indeed, a 3D finite element method of a thin leading edge specimen, Ti–6Al–4V, of a turbine blade is numerically simulated using the ABAQUS software. The mechanical surface modifications (residual stresses, equivalent plastic strains and Johnson–Cook superficial damage) induced by the multiple square laser impact are examined in detail. The main purpose of this investigation is to determine the effects of single-sided and double-sided laser shock peening.

A Critical Review of Laser Shock Peening of Aircraft Engine Components

“…The FE studies conducted to date suggest that the CRS is distributed on the front side, the back side, and the middle plane of the specimen, while TRS is distributed under the CRS layer. [176][177][178] A symmetrical M-shaped stress distribution field is obtained, and the magnitude of the residual stress depends on the thickness of the sheet. [172,174,175,179] In double-sided LSP, it is typically necessary to ensure not only that the simultaneous laser shocks occur from both sides of the sample but that they also focus on the same position, which can be challenging for components with asymmetric structures, such as the tenon joint of an AE blade.…”

“…The FE studies conducted to date suggest that the CRS is distributed on the front side, the back side, and the middle plane of the specimen, while TRS is distributed under the CRS layer. [ 176–178 ] A symmetrical M‐shaped stress distribution field is obtained, and the magnitude of the residual stress depends on the thickness of the sheet. [ 172,174,175,179 ]…”

(Retracted) Measurement method and experimental study of complex profile of turbine blade based on image fusion

“…Finally, the full-surface 3D measurement of large parts is realized by splicing, and multiple measurement points form a measurement network in the visual measurement process. However, the image acquisition range of each visual measurement point is not the same due to the limitation of the surface curvature of the part and the pose of the visual sensor, which leads to the problem of visual measurement network planning 19 , 20 . The rationality of vision measurement network planning is a key factor affecting the quality of image acquisition by vision sensors.…”

“…However, the image acquisition range of each visual measurement point is not the same due to the limitation of the surface curvature of the part and the pose of the visual sensor, which leads to the problem of visual measurement network planning. 19,20 The rationality of vision measurement network planning is a key factor affecting the quality of image acquisition by vision sensors. The quality of the image also determines the 3D measurement accuracy, so the network planning of visual measurement is one of the important research topics in the 3D measurement of large parts.…”

Reliability prediction of high‐cycle fatigue behavior of parts treated by laser shock peening

“…Recently, LSP [1][2][3][4][5][6][7][8][9][10][11] is an innovative surface treatment that is based on the application of a laser pulse (nanosecond regime, power density in GW/cm 2 ) on the surface of the treated material. It involves a hardening of the superficial layers by the propagation of a shock wave.…”