一体化包覆药柱缠绕应力的数值计算

Solid rocket propellant is widely used. Based on the integrated wrapping fiber winding process, the numerical simulation stress calculation of the winding process of the propellant grain was carried out. The finite element model of ABAQUS was established for numerical calculation, and the stress of each node of the grain was analyzed. Based on the actual working conditions, four process parameters, including pretightening force, displacement velocity, rotation velocity and fiber bandwidth, were listed. The dynamic simulation of the winding process was carried out. Meanwhile, the multi-layer winding condition was simulated statically. The calculation results show that the main stress of the grain is within 0.060~0.120 MPa and the maximum stress is 0. 202 MPa after winding. The larger the preloading force, the greater the stress, while the wider the fiber bandwidth, the smaller the winding stress. The velocity and rotational speed of the grain has little effect on the winding stress. In the multi-layer winding process, the stress of the grain increase with the increase of the number of winding layers, corresponding to a slower rising speed. The maximum stress of 0. 338 MPa is obtained at 16 layers. The research results can be used as a reference for the filament-wound process with solid propellant.