Intern, R&D Graduate Summer - Nonlinear Mechanics and Dynamics (NOMAD), Onsite

What Your Job Will Be Like:

The Nonlinear Mechanics and Dynamics (NOMAD) Research Institute is an 8-week long program held at the University of New Mexico (UNM) that brings together researchers from around the world to work on challenging research problems in engineering sciences. The Component Science and Mechanics Department is seeking motivated and productive student interns to contribute to a number of summer research projects. The internship will provide you with opportunities to work in diverse research teams, to participate in a research project that will be presented at a final seminar series, and to engage/network with professionals working within their research fields.

The teams generally consist of 3 interns and 3-5 mentors per project team.

• Implementing Multi-Input-Multi-Output Shock Capabilities

Multi-Input-Multi-Output (MIMO) testing capabilities have been recently implemented as an alternative to vibration shaker tables. They have many advantages, including more realistic boundary conditions, portable setups, and lower costs. This project will focus on the development and implementation of MIMO shock testing, including writing and implementing MIMO shock environment specifications, using MIMO shock capabilities in the Rattlesnake control software, and model integration with MIMO shock test data.

• Dynamically informed topology optimization of nonlinear bolted structures

A recently developed topology optimization capability produces mock components that match the structural dynamics of the actual component, enabling higher-fidelity information earlier in the design process. Challenges to implementation include accounting for bolted joints when components are printed in multiple pieces, and distortion of thin-walled structures. This project will address these challenges using an additively manufactured, modally representative baseball bat.

• Chaotic vibration response of nonlinear components under forced vibration

High-fidelity numerical simulations of complex electromechanical devices have shown extreme sensitivity to non-physical parameters. This observed behavior is reminiscent of chaotic behavior for nonlinear dynamical systems. The goal of this project is to perform a set of vibration experiments to evaluate the sensitivity of the measured vibration response to various conditions, assess whether the system is behaving chaotically, and apply approaches to analyzing chaotic responses for a deterministic system.

• Microstructure-Property Relationships in Tantalum Alloys

Understanding the effect of microstructure on ductility is vital to model tantalum alloys. The goal of this project is to understand the relationship between microstructure and macroscale response through modeling and simulation activities in tantalum alloys. Students will employ crystal plasticity and continuum-scale finite element models. Results will inform how grain morphology and crystallographic texture affect material response and reveal connections between micro- and macro-scale model parameters to facilitate multiscale modeling.

• Experimental characterization of gas transport in a vibrated multiphase system

This project aims to characterize vibrated liquid-gas interface breakup and subsequent gas transport in a simple multiphase system by acquiring and quantitatively analyzing images from high-speed videography. The desired outcome is an improved understanding of how these processes depend on key parameters, including vibration amplitude, vibration frequency, and total gas volume fraction.

• Predicting Printability of Particle-Laden Inks

Additive manufacturing technologies based on material extrusion hinge on particle-laden inks that are printable. A new criterion based on particle loading in the ink differentiates printable inks from poor inks. The students will leverage existing datasets to perform particle packing simulations. Particle suspension constitutive equations to capture the rheology coupled to level set methods will be evaluated. Experiments will assess the impacts of feedstock modifications on printability to maximize particle loading.

Visit our website for more details related to past projects: http://(Use the "Apply for this Job" box below)..html

Due to the nature of the work, the selected applicant must be able to work onsite.

At Sandia, we value the important work done by our interns and its contribution to National Security. Because of this, our interns earn competitive pay rates. Our pay structure is based on earned credit hours, classification, and degree level. Your pay rate will be determined during the hire process and included in your offer package. You can view the Intern Pay Rate chart here (https://)

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You bring the confidence and skills to be eligible for the job by meeting these minimum requirements:

• Earned bachelor's degree
• Currently attending and enrolled full time in the spring term…