Novel Bio-Inspired Face Sheet Design for Resisting Blast Loads in Marine Sandwich Structures
Abstract
Marine structures are normally subjected to harsh loading environments such as shock or blast loadings. This extended project proposal is aimed at the development of Bio inspired face sheets for marine sandwich structures to study the energy absorption effects ofshock and blast loadings of high intensity. This project will utilize the previously developed woodpecker inspired packaged symmetric (Convex, Concave and full suture) viscoelastic suture design to construct a novel bio-inspired face sheet. The developed and optimized suture-based face sheet will be used to manufacture a hybrid marine sandwich structure with foam core and this structure will be subjected to shock loads of varying intensity to study its efficacy in absorbing energy. The project will be performed in 3 phases. In the first phase, the viscoelastic suture designs developed and fabricated in the previous project (Grant no: N62909-19-1-2094)will be used to design a new face sheet of a hybrid sandwich structure and tested for its efficacy in absorbing energy for both axial and transverse loading. A novel suture design based on unsymmetrical suture configuration will be developed, by first formulatinga novel unsymmetrical suture elastic and viscoelastic finite element, and then the suture optimization studies will be performed toobtain the optimal suture parameters for maximum energy absorption. Next its band gap characteristics will be studied using periodic analysis. The second phase of the project will be dedicated to fabricating and testing of hybrid sandwich structure with suture-based face sheet, wherein first the optimized viscoelastic suture structure (both symmetrical and unsymmetrical) will be 3-D printed and protected with aluminum package, which will be subjected to axial and transverse shocks of varying intensities. In the third phase, 3-D finite element modeling of the hybrid sandwich structure will be undertaken, and the FE modeling results will be validated with experimental results for different suture and sandwich structure parameters. The proposed project will finally be aimed at the developing a miniature and light weight shock absorber for marine sandwich structures subjected to high intensity shocks.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 02, 2024
- Source ID
- N629092312048
Entities
People
- Gopalakrishnan Srinivasan
Organizations
- Indian Institute of Science, Bengaluru
- Office of Naval Research
- United States Navy