Hierarchical lattice stiffened cylindrical shell: Design, high-order vibration theory and composite parameter identification

A carbon fiber reinforced hierarchical lattice stiffened cylindrical shell (HLSCS) was designed and manufactured. Introducing effects of bending and coupling stiffness caused by neutral plane offsetting, an improved smeared stiffener method was proposed to homogenize the HLSCS to an anisotropic continuous cylindrical shell with varying-stiffness. The transverse shear stiffness was predicted by the higher-order shear deformation theory to build a high order vibration theory. Composite parameter identification method of the HLSCS was proposed based on the experimental and theoretical results to identify the composite parameters nondestructively. The method suggests discounted fiber volume fraction and stiffness for the completed HLSCS.

Automated summary

This article designs and manufactures a carbon fiber reinforced hierarchical lattice stiffened cylindrical shell (HLSCS). By introducing the effect of neutral plane offsetting, an improved smeared stiffener method is proposed to homogenize the HLSCS. The transverse shear stiffness is predicted using higher-order shear deformation theory, and a nondestructive composite parameter identification method is proposed based on experimental and theoretical results.