Postdoctoral Researcher: Computational Solid Mechanics

Location
California, US
Salary
Competitive
Posted
Feb 23, 2024
Posting live until
Apr 23, 2024
Ref
REF5741L

Company Description

Join us and make YOUR mark on the World!

Are you interested in joining some of the brightest talent in the world to strengthen the United States’ security? Come join Lawrence Livermore National Laboratory (LLNL) where our employees apply their expertise to create solutions for BIG ideas that make our world a better place.

We are committed to a diverse and equitable workforce with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, experiences, and perspectives. This is essential to innovation and creativity for continued success of the Laboratory’s mission.

Pay

$113,760 Annually

Job Description

We are excited to offer an opportunity for a Postdoctoral Researcher with to develop constitutive models and computational methods to simulate solid materials under dynamic loading. This position is in the Atmospheric, Earth & Energy Division, Computational Geosciences Group, but will include work on a variety of materials systems, not limited to geomaterials.

In this role you will

  • Analyze available experimental data and identify and/or develop suitable constitutive model forms to describe strength, damage, rate, and thermal effects in a variety of engineering materials.
  • Develop, adapt, refine, and evaluate numerical methods to mitigate mesh dependency associated with localization (e.g. brittle damage, thermal softening) in large-deformation numerical simulations (e.g. ALE, Eulerian hydrocodes, MPM)
  • Use numerical optimization methods to parameterize complex material models based on available (limited, noisy, variable) data and physical constraints.
  • Use mesoscale simulation to investigate the response of composite / heterogeneous materials under dynamic loading.
  • Conduct large-deformation solid mechanics simulations to validate model for dynamic material response against experimental data.
  • Interface with experimentalists from other research groups to accurately interpret experimental data and inform prioritization of new experiments to reduce modeling uncertainty.
  • Present original research in conferences and publish in peer-reviewed journals.

Qualifications

  • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
  • Ph.D. in mechanical/civil/materials engineering, applied math, condensed matter physics, engineering mechanics, computer science or related field.
  • Experience in application or development of numerical methods for solid mechanics (e.g. FEM, MPM, SPH, ALE, hydrocodes, etc.)
  • Experience with programming /code development for scientific or engineering applications.
  • Self-driven with scientific curiosity and an enthusiasm for research.
  • Excellent verbal and written communication skills necessary to collaborate in a multidisciplinary team environment.
  • Performs other duties as assigned.

Qualifications We Desire:

Any of these would be useful, a candidate is not expected to have all of these qualifications

  • Experience with numerical methods for large-deformation solid mechanics
  • Experience with constitutive model development.
  • Knowledge of theory and experimental methods relevant to the dynamic response (shock loading) of materials.
  • Experience in C++/python, especially experience with large legacy code base or coding for GPU.
  • Experience with Linux systems and high-performance computing platforms.
  • Experience with optimization methods for parameterization of physics models.

Additional Information

All your information will be kept confidential according to EEO guidelines.

Position Information

This is a Postdoctoral appointment with the possibility of extension to a maximum of three years, open to those who have been awarded a PhD at time of hire date.

Why Lawrence Livermore National Laboratory?

Site 300

Site 300 is an experimental test site operated by LLNL. Situated on 7,000 acres in rural foothills approximately six miles southwest of downtown Tracy and 15 miles southeast of Livermore, Site 300 hosts approximately 200 employees with expertise in such fields as engineering, chemistry, biology, and environmental restoration. Employees assigned to work at Site 300 may be exposed to the organism that causes San Joaquin Valley Fever (coccidioidomycosis ).

Security Clearance

This position requires a Department of Energy (DOE) Q-level clearance. If you are selected, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing. Q-level clearance requires U.S. citizenship.

Pre-Employment Drug Test

External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

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We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws.

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