2505 GGB

Turbulent flows made up of solid particles or liquid droplets can be found across a broad range of engineering and scientific disciplines. The nonlinear and multiscale nature of such flows often precludes a direct analytic solution, and instead we must turn to numerical simulations that leverage high-performance computing resources or coarse-grained simulations that rely on subgrid-scale models.

This talk describes a technique called Reachability-based Trajectory Design, which constructs a parameterized representation of the forward reachable set that it then uses in concert with predictions to enable real-time, certified, collision checking.

We are working to accomplish for cells something akin to what a shepherd and sheepdogs bring to flocks of sheep: control over large-scale collective cellular motion. As coordinated cellular motion is foundational to many forms of multicellular life, being able to ‘herd’ or program large-scale cell migration raises exciting possibilities for accelerated healing, tissue engineering, and novel biomaterials.

Nanoscale dual-phase alloys composed of alternate metal (soft) and intermetallic or covalently bonded (hard) strengthening phase exhibit high strength, high strain hardening rate, and measurable plasticity at ambient and elevated temperatures. Here we report unusual plasticity carriers in intermetallic Al 2 Cu and covalently bonded Silicon in Al-Si and Al-Cu alloys based on multiscale experiments and modeling.

Industry already accounts for approximately one-third of global greenhouse gas emissions and these emissions are growing quickly as the developing world industrializes and emissions-intensive materials are used to deliver better performing technologies. We need sustainable materials processing solutions that fit the scale and urgency of the challenge.