Curved folded sheets for stiff, anisotropic, and adaptable structures
Abstract
The project will first establish a fundamental understanding of curved folded systems, and will subsequently explore the details ass"ociated with the global stiffness and localized behaviors. The work is organized into three main Aims: Aim A will create methods for efficient folding simulation and structural analysis of curved folded sheets. Geometric modeling will be integrated with large disp"lacement finite element (FE) simulations, and a methodology will be created to study the structural stiffness. The computational too""ls will be tested, improved, and verified based on theoretical solutions and physical prototypes of curved sheets. The analytical me"thods will also be generalized to simulate different variations in curved folded designs including multiple creases and tubular geometries. Aim B will explore how changing geometric parameters affects the global stiffness characteristics of the curved folded systems. Analyses will explore stiffness and anisotropy in stiffness properties for both simple and more complex folded structures. Param"etric studies will explore i) different folded configurations; ii) cases where a system is manipulated beyond the initial folding, i"ii) crease pattern design parameters; and iv) systems with multiple fold lines. The stiffness characteristics of different structures will be compared to the in-plane and out-of-plane elastic deformations. Aim C will build upon the understanding of global characteristics and will explore reasons for potential failure in the curved folded sheets. High fidelity parametric analyses of the structures will be used to identify locations with high stress concentrations or those that are prone to buckling. System geometries that mitigate these potential failures will be identified and selected for further study.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 06, 2017
- Source ID
- N000141812015
Entities
People
- Evgueni Filipov
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy