Postdoctoral Appointee for Shock Response of Materials

Sandia National Laboratories

Albuquerque, NM

Job posting number: #7083999 (Ref:678139)

Posted: August 27, 2021

Job Description

This posting will be open for application submissions for a minimum of seven (7) calendar days, including the ‘posting date’. Sandia reserves the right to extend the posting date at any time. : The Materials and Failure Modeling Department is looking for a highly motivated and productive individual to work in a dynamic multidisciplinary teaming environment, with a focus on simulating the shock response of heterogeneous materials using explicit 3D microstructures. Specifically, for this role, the candidate will make inferences on realistic material behavior at millimeter length scales, while resolving microstructural features down to tens of microns in size. There will be a strong emphasis on simulating energetic materials (both inert and reactive), and you will work alongside experienced staff running hydrocodes and fitting material models and equation of state. In this role, you will also be responsible for demonstrating credible simulation results to be compared to the measured experimental datasets; you will also develop and apply novel post processing techniques, including probability distribution functions or dimensionality reduction algorithms, to the fluctuating 3D output field data, in addition to other 3D visualizations. There will be interactions with software development teams, image analysts, and you will utilize the high-performance computing resources available at a National Laboratory. There are significant opportunities for an early career PhD to work on challenging problems that will yield impactful results in archival journal publications. On any given day, you may be called on to: + Work with the mentorship of Sandia staff to perform world-class research focused on running large 3D simulations with explicit microstructures, including shock wave propagation and shock interactions with the microstructure, via the hydrocode CTH. + Develop and apply novel post processing techniques for large 3D spatio-temporal datasets, to inform higher fidelity continuum shock hydrocodes and material models. + Work closely with subject matter experts, software developers, and experimentalists. + Publish and present results to the scientific community through technical conferences and peer-reviewed journals. + Develop laboratory-wide collaborations across multiple Sandia organizations and work as part of a multi-disciplinary team. + Perform all duties in compliance with operational safety, security, and quality guidelines. Join our team and achieve your dreams while making a difference!

Required:
+ PhD in Mechanical Engineering, Applied Mechanics, Aerospace Engineering, Civil Engineering, or related field + Experience in computer programming and code development with Python or MatLab + Excellent written and oral communication skills as evidenced by conference presentations and journal publications + Ability to obtain and maintain a DOE Q-clearance

Desired:
+ Background includes understanding of shock physics concepts: Rankine-Hugoniot, Chapman-Jouguet, and Mie-Gruneisen equation of state + Experience running at least one 2D or higher engineering code (e.g., any FEA or finite difference code, COMSOL, Ansys Fluent, Abaqus, etc.) + Prior research experience in mesoscale modeling and simulation, preferably in high-rate impact and shock regimes + Familiarity of methods for random heterogeneous materials, including the representative volume element and image reconstruction techniques + Familiarity using Linux and writing Bash scripts to automate processes and workflows + Skill in interfacing with high-performance computing resources + Strong ability to work in a multi-disciplinary team setting

Department Description:

The Materials and Failure Modeling Department 1558 performs material mechanics R&D, develops advanced engineering models, and deploys state-of-the-art computational capabilities to enable physically credible prediction of material behavior and failure in support of Sandia’s mission. Focus areas of the department include adaptive material and failure models, robust computational material library covering events from aging to shock physics, effective model calibration methodologies, and quantification of margin and uncertainty of material models.

About Sandia:

Sandia National Laboratories is the nation’s premier science and engineering lab for national security and technology innovation, with teams of specialists focused on cutting-edge work in a broad array of areas. Some of the main reasons we love our jobs: + Challenging work with amazing impact that contributes to security, peace, and freedom worldwide + Extraordinary co-workers + Some of the best tools, equipment, and research facilities in the world + Career advancement and enrichment opportunities + Flexible work arrangements for many positions include; 9/80 (work 80 hours every two weeks with every other Friday off) and 4/10 (work 4 ten-hour days each week) compressed workweeks, part-time work and telecommuting (a mix of onsite work and working from home) + Generous vacations, strong medical and other benefits, competitive 401k, learning opportunities, relocation assistance and amenities aimed at creating a solid work/life balance* World-changing technologies. Life-changing careers. Learn more about Sandia at: http://www.sandia.gov *These benefits vary by job classification.

Security Clearance:

Sandia is required by DOE to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants for employment need to be able to obtain and maintain a DOE Q-level security clearance, which requires U.S. citizenship. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted. Applicants offered employment with Sandia are subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment.

EEO Statement:

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status and any other protected class under state or federal law. : This postdoctoral position is a temporary position for up to one year, which may be renewed at Sandia's discretion up to five additional years. The PhD must have been conferred within five years prior to employment. Individuals in postdoctoral positions may bid on regular Sandia positions as internal candidates, and in some cases may be converted to regular career positions during their term if warranted by ongoing operational needs, continuing availability of funds, and satisfactory job performance.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.


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