Geometric Mechanics of Hypar-derived Metamaterials

Presenter(s)

Trevor Walker

Abstract or Description

As we reach the middle years of the twenty first century there has already been significant advancements in computer aided data analysis and optimization modelling. While new construction materials may not appear in the near future, particular construction methods that optimize the cost-benefits of materials combined with structural optimization to reduce the amount of material needed to achieve a desired result is completely capable in the current scope of engineering abilities. Materials created using efficient topology are called “metamaterials” and possess superior properties (strength, stiffness, etc.) relative to natural materials.

One way to create stronger, lighter, and stiffer materials is to use the unique shape of hypar surfaces, which resemble Pringle chips or saddles. By studying their compressive strength, we can determine their material properties and optimize their height, width, base shape, and array style to achieve the best mass to strength ratio. Hypar-derived metamaterials can offer greater strength and stiffness compared to traditional lightweight composites like honeycomb sandwich panels because of the inherent strength provided by this geometric pattern. This approach to construction may lead to new and improved materials that can be used in a variety of applications.

The objectives and tasks of this project are to gain a deeper understanding of the mechanics of failure in lightweight hypar structures, and to develop and optimize hypar-derived metamaterials with superior mechanical properties compared to conventional materials such as honeycomb sandwich panels.