Xinran (Sharon) Xiao

Professor

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Experience

Testing and Simulation of Composite Engine Structures. From left: the custom design spin rig with 9 viewports; a glass fiber composite fan case contained a Ti blade released at 20,000 rpm; the high speed video footage of the experiment. A predictive model is under development. Link

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Crashworthiness Predictions of Composite Structures

Solid progress has been made towards a robust crash model for composite primary energy absorbing structures. Both the response curves and failure morphologies were predicted. Link

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Optimal Design of Cutting Tool and Machining Process

Why does the cutting force decrease with the rake angle? Why is a particular chip-breaker design only suitable for a given material under a narrow region of cutting conditions? The finite element simulations revealed that there is a strong correlation between the stress state in the point of separation and the energy spent in machining. The cutting tool design and machining process can be optimized for each material according to the principle of minimum strain energy to fracture proposed by Astakhov (Link). A new test specimen has been developed to obtain model parameters at low and negative stress triaxiality regions typical for metal cutting (Link).

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Multiscale Modeling

Why are the manufacturing micro-cracks found predominately in 90 plies? What makes 25/90  interface less susceptible to these pre-existing micro-cracks? Multiscale models can shed some light.

Meso- and micro-structural effects in large composite structure models

In collaboration with NASA Glenn, a sub-cell approach is under development. Link

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Multiphysics Modeling of Lithium Batteries. How does the stress induced by lithium insertion interact with lithium diffusion? How do we design batteries with high capacity electrodes such as Si? A multiphysics model is under development for this investigation. Link .