- Introduction​

Eggshell is a structure which must be strong enough to bear the weight of the bird during contact incubation but also allow nestling breaking out of the egg. Moreover, the avian eggs are diverse in size, shape and color. The research team defined a dimensionless number C, a function of egg weight, stiffness and dimensions, to quantify how stiff an egg is.

- Compression Test & Nanoindentation Test

We use compression test and nanoindentation test to find out the stiffness of the fresh eggs' shells.

- Simulation

Because of the diversity of bird species, we cannot get all the fresh eggs of them. We create finite element models of eggs and use published egg images and data. Simulate the compression test to estimate the stiffness and equivalent Young’s modulus of eggshell.

- EBSD

Actually, eggshells aren't all homogeneous and isotropic materials. Using EBSD technology can help us to understand the microstructure of eggshells and analysis the data of eggshells' stiffness.

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