Fundamental Research in Propulsion Material State
at ORAU Workforce Solutions

Date Posted: 3/23/2019

Opportunity Description

Fundamental Research in Propulsion Material State Awareness of Army Vehicles Advisors: Ghoshal, Anindya [Click Here To Join]; 410.278.7358) Dykas, Brian D [Click Here To Join]; 410.278.9545) Kweon, Chol-Bum M. [Click Here To Join]; 410.306.4735) The US Army Research Laboratory conducts basic and applied research involving Propulsion Material State Awareness for rotorcraft. Specialized engine and drivetrain materials require continual improvements to expand performance of aerospace propulsion systems. This research associateship is a critical part of on-going mission programs toward developing advanced propulsion material state awareness methodologies for current and future Army vehicles. This research effort will focus on development of advanced experimental and analytical methods for propulsion material state awareness in Army vehicles, identification of thermomechanical fatigue driven damage nucleation and micro damage precursors in propulsion materials, discovery and improvement of engineered high temperature materials to mitigate thermomechanical fatigue damage nucleation, which are fatigue resistant, wear erosion resistant, foreign object damage impact resistant via analytical and/or computational models and experimental validation. Research proposals are invited to develop propulsion material state awareness methods based upon first principles, e.g. physics, material science based methods, and damage evolution characteristics. The areas of technical interest include, but are not limited to, propulsion material damage precursors nucleation and propagation, prediction of remaining useful life of a component and/or system, investigation into advanced high temperature sensing materials, sensors and sensor arrays, advanced signal processing techniques, sensor optimization and placement, data fusion, component and propulsion engine/drivetrain system level reasoners and reasoning methods, advanced propulsion material state awareness hardware/software, self responsive engineered high temperature materials leading to total propulsion material state awareness that can reduce the logistics footprint and life-cycle costs while increasing vehicle availability. Some possible research topics include: Propulsion Material State Awareness a. Create high temperature embedding, minimally invasive or nonintrusive sensing systems for physical measurements (strain, acceleration, heat flux, ultrasonic, capacitance, tip clearance etc) based on new high Curie temperature piezoelectric, piezoresistive, capacitive, magnetostrictive and fiber optic sensing materials. b. Determine sensor driven remaining life estimation using physics models considering uncertainty in material structure/properties and environment. c. Repair and heal ceramic composites through embedded microwave systems. d. Create physics models for coupled field behavior, i.e. resistance/capacitance and thermomechanical, di-electric, opto-mechanical, et al. e. Establish a virtual testbed using a combination of gas path analysis, model predictive analysis and instrumented engine response leading to evaluation and optimal placement of new (low cost) sensor technologies. f. Facilitate data driven propulsion material state awareness including data compression techniques and optimal/suboptimal sensor strategies. g. Develop Propulsion system and subsystem level reasoners including Engine and Drivetrain System Reasoner. h. Develop reliability and life prediction models for propulsion materials using probabilistic analysis techniques incorporating the physics of evolution of material damage precursors, damage nucleation and damage propagation across length scales. References: 1. Ghoshal, A., Kim, H. S., and Le, Dy D., 'Technological Assessment of High Temperature Sensing Systems under Extreme Environment,' Sensor Review, Vol. 32 Issue 1, pp.66 - 71, 2012 2. Liu, K.C., and Ghoshal, A., 'Inherent Symmetry and Microstructure Ambiguity in Micromechanics.' Composite Structures, Volume 108, February 2014, Pages 311–318 2013

Opportunity Snapshot

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Grooming future leaders in science and technology requires enhancing the skills, knowledge and experience of workers early in their careers. To that end, ORAU (Oak Ridge Associated Universities) assists in connecting the best and most diverse students, recent graduates, faculty and professionals with world-class fellowships, internships and jobs, whether in national laboratories, research institutions, federal government offices or private sector R&D departments.

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