Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
In plane elastic parameters of embedded co cured stitched damping composites
| DOI: | 10.11809/bqzbgcxb2024.02.040 |
| Keywords: | composite material; equivalent elastic parameter; theoretical model; suture damping; fiber deformation model; warp and weft yarn deformation |
| Abstract: | Embedded Co cured Stitched Damping Composite (ECSDC) has the advantages of high specific stiffness, high specific strength, high interlayer bonding properties and three way mechanical designability compared to conventional composites. The in plane mechanical properties of fiber reinforced damping films would be destroyed by the introduction of composite nails, which made the theoretical analysis of the ECSDC structure difficult. In this paper, the in plane fiber folding deformation model with composite nails penetration were applied to delineate the deformation regions and establish the theoretical model of in plane equivalent elastic parameters for each region such as warp and weft yarn deformation region, resin rich region, and seam line respectively, thus transitioning to ECSDC structure. As an example, the typical structure of ECSDC is studied by ANSYS finite element simulation and MATLAB numerical calculation. Compared with the literature values, the results obtained by the three are in good agreement, which verifies the accuracy of the theoretical model and method. On this basis, the effect of the design parameters on the equivalent elastic parameters within the ECSDC surface is investigated with a validated theoretical model. This analytical model modeling approach provides a reference for studying the mechanical properties of cytosolic composites and provides a basis for studying the dynamics and geometric nonlinearity of ECSDC structures. |
| Published: | 2024-02-28 |