Alex Zelhofer

Alex Zelhofer, Ph.D., P.E.

Managing Engineer
Mechanical Engineering
Los Angeles
  • CV (English)
  • Contact Card

Dr. Zelhofer specializes in the development, evaluation, and failure analysis of industrial equipment and consumer products. He has applied his expertise to analyses involving hydraulic equipment, manual and automated industrial machines, vehicle associated equipment, micromobility vehicles (e.g. electric scooters and bicycles), exercise equipment, industrial and consumer tools, and chairs. His experience spans industrial sector advisor, litigation consultant, and academic lecturer.

Specific examples of Dr. Zelhofer’s experience include:

  • Hydraulic equipment used in the construction and automotive industries including hydraulic pistons, floor jacks, bottle jacks, and hand pumps.

  • Industrial equipment used in warehouses, construction, and food processing industries including automated equipment, forklifts, reach trucks, industrial vats, food processing equipment, scaffolding, and conveyors.

  • Vehicle associated equipment either located on the vehicle or used as part of normal operation or maintenance including jack stands, tailgates, winches, loading ramps, dock levelers, and gas fuel nozzles.

  • Micromobility vehicles commonly seen in urban areas including electric standing scooters, electric seated scooters, and electric bicycles.

  • Exercise equipment used in condominiums and public gyms including strength training equipment, selectorized equipment, and stationary bikes.

  • Industrial and consumer tools used in the construction, fabrication, machining, and agriculture industries including grinding wheels, mills, lathes, saws, drills, nailers, grinders, sanders, air compressors, generators, brush mowers, and tillers.

  • Chairs used in public areas and private residences including waiting rooms, casinos, and sporting events.


In the course of evaluation and failure analysis Dr. Zelhofer performs both non-destructive and destructive techniques of investigation. For non-destructive evaluation he frequently uses 3D scanning via LiDAR (light detection and ranging) and CT (computerized tomography), 2D X-ray, and dimensional measurement using a coordinate measuring machine (CMM). For destructive evaluation Dr. Zelhofer frequently employs his extensive woodworking and metalworking knowledge coupled with his expertise in machine design to dissect and/or test items of focus. He is frequently called upon to conduct destructive testing in high load applications.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, California Institute of Technology (Caltech), 2017
  • M.S., Mechanical Engineering, California Institute of Technology (Caltech), 2014
  • B.S., Mechanical Engineering, Milwaukee School of Engineering, 2008
  • NASA Aeronautics Fellowship, 2010

    American Society of Mechanical Engineering, Foundation Gratitude Scholarship, 2009

LICENSES & CERTIFICATIONS

Licensed Professional Engineer, California, #39478

IFPS Certified Fluid Power Hydraulic Specialist, Certificate #32368

OSHA Occupational Safety and Health Standards for General Industry Course (OSHA 511)

40-Hour HAZWOPER (Hazardous Waste Operations and Emergency Response) Certificate #37257

Certified Forklift Operator

PADI certified SCUBA diver (Advanced Open Water)

Publications

Desmoulins A, Zelhofer AJ, Kochmann DM. Auxeticity in truss networks and the role of bending versus stretching deformation. Smart Materials and Structures 2016; 25(5):054003.

Meza LR, Zelhofer AJ, Clarke N, Mateos AJ, Kochmann DM, Greer JR. Resilient 3D hierarchical architected metamaterials. Proceedings of the National Academy of Sciences 2015; 112(37):11502-11507.

Presentations

Zelhofer AJ. Directional wave propagation in structural lattices. ASME IMECE, Phoenix Convention Center, Phoenix, AZ, November 15, 2017.

Zelhofer AJ. Modeling hierarchical lattice stiffness scaling and effect of beam waviness. 52nd Annual SES Technical Meeting, Texas A&M, College Station, TX, October 26, 2015.

Zelhofer AJ. Effect of unit cell topology on periodic lattice stability. ASME IMECE 2015, Houston, TX, November 12—19, 2015.

Prior Experience

Lecturer – Machine Design, Loyola Marymount University, 2019

Graduate Research / Teaching Assistant, California Institute of Technology, 2012-2017

Composite Structures Intern, NASA Dryden Flight Research Center, 2011

Undergraduate Research Assistant, MSOE Rapid Prototyping Research, 2009-2011

Professional Affiliations

American Society of Mechanical Engineers (member)

International Fluid Power Society (member)

American Society of Testing and Materials

  • Committee F15 - Consumer Products (member)

  • Committee F42 - Additive Manufacturing Technologies (member)

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, California Institute of Technology (Caltech), 2017
  • M.S., Mechanical Engineering, California Institute of Technology (Caltech), 2014
  • B.S., Mechanical Engineering, Milwaukee School of Engineering, 2008
  • NASA Aeronautics Fellowship, 2010

    American Society of Mechanical Engineering, Foundation Gratitude Scholarship, 2009

LICENSES & CERTIFICATIONS

Licensed Professional Engineer, California, #39478

IFPS Certified Fluid Power Hydraulic Specialist, Certificate #32368

OSHA Occupational Safety and Health Standards for General Industry Course (OSHA 511)

40-Hour HAZWOPER (Hazardous Waste Operations and Emergency Response) Certificate #37257

Certified Forklift Operator

PADI certified SCUBA diver (Advanced Open Water)