Simulated analysis of the influence of the sequence of bionic fringe preparation on residual stress and deformation of WC/TC4 cladding bionic wear-resistant layer on the surface of flaps slide

In the experiment of fabricating wear-resistant layer of bionic structure by laser cladding on the surface of aircraft flaps slide rail （TC4 titanium alloy）,due to the dense structure of bionic layer,it is easy to produce large residual stress and warpage deformation in the process of laser cladding. According to the difference of residual stress and deformation in the flaps slide caused by different preparation sequence of bionic fringes,a numerical simulation method was proposed to analyze the effect of laser bionic fringes preparation sequence on residual stress and deformation of WC/TC4 cladding layer on the flaps slide surface. Firstly,the laser cladding process was simplified appropriately,and four different models of bionic fringe preparation sequence are established: the first step is to use CATIA software to establish the entity model,the second step is to use Hyper Mesh software to mesh the entity model,and the last step is to import the mesh model into MSC. Marc software and set various conditions and the order of bionic fringe preparation. Then,the residual stresses and deformations of different order of bionic fringe preparation were simulated. The simulation results show that the residual stress mainly concentrates around the clamping point and on the cladding layer,while the deformation mainly concentrates on the central part of the matrix far from the clamping point. Generally,the deformation on the cladding layer is small. The residual stress and deformation can be effectively controlled by using the sequence of bionic fringes preparation from both sides to the middle. Furthermore,the preparation sequence of alternating bionic stripes is better than that of stepby-step bionic stripes,and the residual stress and deformation of the former are 792 MPa and 1. 08 mm,respectively. The experimental results have guiding significance for the fabrication of bionic wear-resistant layer on the surface of aircraft flaps slide rail by laser cladding,and improve the experimental efficiency.