Forced vibration analysis of blade after selective laser shock processing based on Timoshenko’s beam theory

A Critical Review of Laser Shock Peening of Aircraft Engine Components

“…First, to ensure the internal equilibrium state of the material, TRS will be generated along the direction of the CRS when LSP is carried out from one side, which will decrease the depth of CRS generated by LSP. [165,166] Secondly, LSP will produce a dimple on the peened side and a bulge on the reverse side of a thin AE blade [166] and will cause an uneven distribution of the RS field. More importantly, spalling and fracture can also occur when the intensity of the laser is too high.…”

“…To reduce costs, in actual engineering practice, only the critical regions of the blade surface are typically treated, and this process is known as selective LSP. As shown in Figure 28, Fu et al [165] found that LSP can effectively suppress the deflection of the [217] Copyright 2009, Elsevier.…”

“…To reduce costs, in actual engineering practice, only the critical regions of the blade surface are typically treated, and this process is known as selective LSP. As shown in Figure , Fu et al [ 165 ] found that LSP can effectively suppress the deflection of the blade; in other words, it effectively suppresses the forced vibration response of the blade. In addition, the different peened areas of the specimen (the regions labeled as A1–A5 in Figure 28a) have different degrees of deflection of the blade.…”

“…That means the peening region influences the enhancing effect. [ 165 ] Therefore, vibration deflection can be used as an optimization objective when selecting the region to strengthen, and this provides helpful guidance for optimizing the LSP process parameters.…”

“…Figure 28. a) Schematic showing five strengthened zones on a blade surface. b) Blade deflection responses observed when different positions are strengthened.Reproduced with permission [165]. Copyright 2020, Elsevier.…”