Farzana Ansari
Farzana Ansari, Ph.D.
Senior Associate
Materials & Corrosion Engineering
Menlo Park

Dr. Ansari's general areas of expertise include failure analysis and fractography, medical device development and testing, and mechanics of materials. Her specialties includefatigue and fracture mechanics, with a particular emphasis on polymers used in medical device technology. Dr. Ansari's experience includes mechanical testing using Instron load frames or custom-design equipment, including tensile, compression, fatigue and wear evaluation, as well as imaging techniques such as optical microscopy and scanning electron microscopy (SEM). She is also familiar with compositional and microstructural analysis techniques such as energy dispersive X-ray spectroscopy (EDX), differential scanning calorimetry (DSC) andFourier transform infrared (FTIR) spectroscopy. Dr. Ansari has drawn on much of this experience as a part-time lecturer on orthopedic device function and failure at Santa Clara University.

Prior to joining Exponent, Dr. Ansari completed her Ph.D. dissertation work at the University of California, Berkeley, under the advisement of Professor Lisa Pruitt. Her research examined the influence of notch design on fatigue behavior of medical grade ultrahigh molecular weight polyethylene (UHMWPE) for use in orthopedic implants (hip, knee and shoulder replacements) utilizing linear elastic fracture mechanics. Her research included both experimental and computational (finite element analysis) evaluation to assess structure-property relationships of various medical grade UHMWPE formulations. Dr. Ansari also worked closely with three orthopedic surgeons throughout her tenure at UC Berkeley to assess several fractured orthopedic device retrievals to perform root cause analysis using both modeling and material characterization techniques.

While at the UC Berkeley, Dr. Ansari served as a teaching assistant for several courses within the Department of Mechanical Engineering, including Mechanics of Materials, Statics, and Structural Integrity of Biomaterials. Additionally, Dr. Ansari worked at Baxter Healthcare before graduate school, participating in verification and validation efforts of surgical sealant spray devices. She also interned at the Food & Drug Administration (FDA) in the Division for Cardiovascular Devices, where she assisted in educating reviewers on appropriate preclinical fatigue testing conditions of peripheral vascular stents.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, University of California, Berkeley, 2015
  • M.S., Mechanical Engineering, University of California, Berkeley, 2012
  • B.S., Biomedical Engineering, University of Southern California, 2009

Publications

Ansari F, Lyons C, Siskey R, Donthu S, MacLean S. Mechanical Characterization and Fractography of PC, ABS & PMMA: A Comparison of Tensile, Impact & ESC Fracture Surfaces. Proceedings, ANTEC 2017, Society of Plastics Engineers, Anaheim, CA, 2017.

Page C, Kreuzer S, Ansari F, Eason D, Hamed E, Watson H. Optimizing 3D Printed Components: A Methodological Approach to Assessing Print Parameters on Tensile Properties. Proceedings, ANTEC 2017, Society of Plastics Engineers, Anaheim, CA, 2017.

Ansari F, Gludovatz B, Kozak A, Ritchie RO, Pruitt LA. Notch fatigue of ultrahigh molecular weight polyethylene (UHMWPE) used in total joint replacements. Journal of the Mechanical Behavior of Biomedical Materials 2016; 60:267-279.

Ansari F, Ries MD, Pruitt L. Effect of processing, sterilization, and crosslinking on UHMWPE fatigue fracture and fatigue wear mechanisms in joint arthroplasty. Journal of the Mechanical Behavior of Biomedical Materials 2016; 53:329–340.

Ansari F, Chang J, Huddleston J, Van Citters D, Ries M, Pruitt L. Fractography and oxidative analysis of gamma inert sterilized posterior-stabilized tibial insert post fractures: Report of two cases. The Knee 2013; 20(6):609–613.

Ansari F, Pack LK, Brooks SS, Morrison, TM. Design considerations for studies of the biomechanical environment of the femoropopliteal arteries. Journal of Vascular Surgery 2013; 58(3):804–813.

Presentations

Ansari F, Lyons C, Siskey R, Donthu S, MacLean S. Mechanical Characterization and Fractography of PC, ABS & PMMA: A Comparison of Tensile, Impact & ESC Fracture Surfaces. Society of Plastic Engineers, ANTEC 2017 Conference, Society of Plastics Engineers, Anaheim, CA, 2017.

Ansari F, Gludovatz B, Kozak A, Ritchie RO, Pruitt LA. A Linear Elastic Fracture Mechanics Approach and Implications for Total Joint Replacement Design. 6th International Conference on the Mechanics of Biomaterials and Tissues, Waikoloa, HI, 2015.

Ansari F, Malito L, Pruitt L. Analysis of surface damage on retrieved total shoulder replacements—A comparison to hips and knees. Invited Speaker, 7th Annual World Congress of Biomechanics, Boston, MA, 2014.

Ansari F, Patten E, Chang J, Chou S, Mehdizadeh A, Kury M, Huddleston III J, Jewett B, Mickelson D, Kim H, Ries M, Pruitt L. Failure analysis of crosslinked UHMWPE implants with stress concentrations: clinical implications. Podium Talk, 6th International UHMWPE Meeting, Torino, Italy, 2013.

Ansari F, Alvarez E, Harman MK, Mayor MB, Van Citters D. Metal bearing surfaces in total joint arthroplasty: Do different joints display similar damage. Podium Talk, Society for Biomaterials Annual Meeting, 2013.

Ansari F, Patten E, Cruz C, Beitel E, Swan A, Gunther SB, Norris, TR, Ries M, Priutt L. Profilometry analysis and improvements of a novel damage scoring method for metal bearing surfaces of shoulder replacements. America Society for Mechanical Engineering Summer Bioengineering Conference, 2012.

Prior Experience

Engineering Intern/Co-op, Baxter BioScience, 2009–2010

Graduate Student Instructor, UC Berkeley, 2010–2014

News & Events

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, University of California, Berkeley, 2015
  • M.S., Mechanical Engineering, University of California, Berkeley, 2012
  • B.S., Biomedical Engineering, University of Southern California, 2009