Joel Johnston Email & Phone Number

Albany, Ny, Us

Albany, New York Area

Cleveland, Oh

• Collaborated with Army and NASA Langley colleagues to analyze deformation data from digital image correlation measurements of hybrid gear testing• Monitored the temperature and deformation response in composite rotorcraft components tested under multiaxial loading conditions (torsion, parallel offset, and bending) at high rotational speeds using a hybrid drive rig • Developing an optimization methodology of composite gear design which will improve the functionality of rotorcraft systems and enable the integration of multifunctional materials within the gear• Applied composites to different gear configurations for high power density rotorcraft applications• Utilized a high speed IR camera system to study large heat generation effects in composite materials during ballistic impact • Investigating modeling and experimental techniques to determine the forming capabilities of advanced composite architectures and prevent manufacturing defects (such as wrinkling, fiber tow shifting, and fabric failure) • Characterized variability in composite structures through x-ray computed tomography and incorporated the variability within a model to simulate the structural response• Studying triaxially braided composite material hybridized with multiple types of fiber

Tempe

Tempe, Az

• Assisted in writing and preparing eight research proposals to funding agencies within the DOD, DOE, and NASA• Collaborated with industry partners to lead multiple consortium projects• Assisted with managing expenditures and business activities in the AIMS Center • Mentored several undergraduate engineering students in the ASU Fulton Undergraduate Research Initiative (FURI) and in the Army Undergraduate Research Apprenticeship Program (URAP)• Trained undergraduate and graduate students on the proper and safe usage of mechanical equipment in AIMS Center laboratories• Performed thermomechanical static testing of braided composite materials at various environmental conditions to obtain material properties and understand material behavior under varying flight conditions of aerospace structures • Analyzed the damage and failure modes in composite materials using digital image correlation, flash thermography, and scanning electron microscopy• Conducted biaxial fatigue and static testing of hybrid fiber metal laminates and aluminum alloys to understand crack initiation and propagation as well as fatigue life• Extended a sectional micromechanics model for polymer matrix composites by characterizing the composite microstructure and incorporating the variability through stochastic methodologies• Implemented a 3D progressive damage theory and multiscale failure criteria within different micromechanical approaches• Simulated ballistic impact and high strain rate loading of composites using multiscale models integrated with LS-Dyna

Doctor Of Philosophy (Ph.D.), Mechanical Engineering

Activities and Societies: American Society of Mechanical Engineers (ASME), American Institute of Aeronautics and Astronautics (AIAA).

Bachelor’S Degree, Mechanical Engineering