Postdoctoral Appointee - Large Scale Peridynamic Simulations

Sandia National Laboratories

Albuquerque, NM

ID: 7072349 (Ref.No. 673999)
Posted: November 19, 2020

Job Description

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. : 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. : We are seeking a dedicated and driven Postdoctoral Appointee with an interest and expertise in large scale peridynamic (http://www.peridynamics.org/) simulations of concrete and cement fracture and degradation. The selected candidate will work with a results-oriented team of computational and experimental scientists to develop and detail methods for incorporation of chemical degradation effects into fracture of mesoscale and macroscale cement and concrete structures. On any given day, you may be called to: + Design, perform, and analyze simulations of concrete/cement fracture + Develop mesoscale concrete structure models + Analyze results using python or post-processing software + Conduct work in a multi-disciplinary teaming environment + Write research manuscripts

Required:
+ PhD in Chemical Engineering, Materials Science, Mechanical Engineering, or related Science & Engineering field + Experience in fracture mechanics modeling + Outstanding interpersonal and communication skills as evidenced by a record of results published in peer-reviewed journals and external presentations at professional scientific conferences

Desired:
+ Familiarity with finite-element-method (FEM) and/or peridynamic simulation methodologies + Knowledge of computing environments or experience running massively parallel simulations + Methods for development of mesoscale concrete structure models + Knowledge of cement and concrete chemistry + Proven record of teaming with a multi-disciplinary team, including experimentalists + Strong technical writing and communication skills

Department Description:

The Geochemistry Department has expertise in three areas: 1) molecular-scale modeling, 2) experimental geochemistry, and 3) applied environmental/chemical engineering. We tackle geosciences-related problems with an application for carbon sequestration, unconventional oil and gas recovery, nuclear waste management, and environmental remediation. In addition, we reach beyond the subsurface environment looking at nuclear weapons applications and air-borne contaminant detection and removal. Program focus is currently on chemical effects on fracture initiation and propagation, heterogeneous redox chemistry on clay mineral surfaces, coupled geochemistry and geomechanics in shales, and permeable reactive barriers for soil radionuclide remediation. Computing facilities for molecular modeling include a cluster (CPU nodes, GPU nodes) maintained by the Geochemistry Department as well as the Sandia High Performance Computing. In addition, we have 3,000 square feet of laboratory space that includes the following analytical equipment: XRD, FTIR, ICP-MS, ICP-OES, TOF-MS, and SEM.

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 withamazingimpact 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 schedules, generous vacations,strongmedical 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:

This position does not currently require a Department of Energy (DOE) security clearance. Sandia will conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Furthermore, employees in New Mexico need to pass a U.S. Air Force background screen for access to Kirtland Air Force Base. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause access to be denied or terminated, resulting in the inability to perform the duties assigned and subsequent termination of employment. If hired without a clearance and it subsequently becomes necessary to obtain and maintain one for the position, or you bid on positions that require a clearance, a pre-processing background review may be conducted prior to a required federal background investigation. Applicants for a DOE security clearance need to be U.S. citizens. 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. Members of the workforce (MOWs) hired at Sandia who require uncleared access for greater than 179 days during their employment, are required to go through the Uncleared Personal Identity Verification (UPIV) process. Access includes physical and/or cyber (logical) access, as well as remote access to any NNSA information technology (IT) systems. UPIV requirements are not applicable to individuals who require a DOE personnel security clearance for the performance of their SNL employment or to foreign nationals. The UPIV process will include the completion of a USAccess Enrollment, SF-85 (Questionnaire for Non-Sensitive Positions) and OF-306 (Declaration of for Federal Employment). An unfavorable UPIV determination will result in immediate retrieval of the SNL issued badge, removal of cyber (logical) access and/or removal from SNL subcontract. All MOWs may appeal the unfavorable UPIV determination to DOE/NNSA immediately. If the appeal is unsuccessful, the MOW may try to go through the UPIV process one year after the decision date.

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.

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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