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The multi‐scale modeling and Finite element (FE) analysis of three‐dimensional angle interlock woven composites (3DAIWC) subjected to ballistic impact by conical‐cylindrical projectile have been studied in the present research. A multi‐scale modeling technique has been adopted in the Finite Element Analysis (FEA), which incorporates micro‐meso‐macro‐transition approach called macro‐homogeneous meso‐heterogeneous modeling technique. This macro‐meso‐micro‐transition approach has been implemented in the present research to develop the complex weave architecture of the target plate. A voxel‐based nonconformal mesh has been utilized to understand the behavior of the representative volume element (RVE) of the woven composite target plate. The model is validated by two dimensional weave architecture, which is analyzed for varying nose shapes (30° conical ‐ 180° flat). The macro‐homogeneous results provide the velocity variation and energy absorption of the projectile with respect to the time history.

The present study deals with the finite element analysis (FEA) of hybrid 3D orthogonal woven composite (3DOWC) subjected to ballistic impact by a conical‐cylindrical projectile. The present simulation incorporates the micro‐meso‐macro transition approach is used for developing the intricate design of the target plate. The glass fibers are used for Warp and Weft direction, and Kevlar fibers are considered for the z‐direction binder yarns. The model is approved by utilizing 2D weave design, which has been examined by impacting the conical‐cylindrical projectile and compared with the available literature. Furthermore, the ballistic analysis is extended for the Hybrid 3DOWC, where the effect of residual velocity and energy absorptions are studied. The study highlights that z‐direction fibers have not much influence on energy absorption for both the hybrid and unhybridized 3DOWC. Furthermore, the influence of hybridization will subside with the increased velocities.

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Residual stress analysis of swage autofrettaged gun barrel is performed in this study via finite element (FE) method. The swage autofrettage technique is one of the modernized pre-stressing methods to enhance the load bearing capacity and fatigue life of all gun barrels. An oversized moving mandrel is forced inside the gun barrel, which deforms the material through physical interference. The process is analyzed by evaluating residual stresses using a commercially available software package. The deformation effects caused by the mandrel and the geometrical variation of the mandrel on the gun barrel are analyzed in this study. This field has been insufficiently researched, but the effect of pre-stressing on the barrel, and at the start and mid-length for the swaging process, is not well examined. Thus, further analysis is required. The variations and effectiveness of the designed pressure band model are shown to define the problem easily. Results are evaluated at mid-length using a fixed fringe width percentage (A defined percentage of gun barrel axial length). The desired effects are well validated through numerical investigation using FE analysis. This study reveals that the geometry should be designed very thoroughly to determine the after effects. If too many variations occur, then the initial force requirement is extremely high; otherwise, the desired swaging effect cannot be achieved.