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Title: Fatigue and Fracture of Small Structures
Authors: Shan, Wanliang
Advisors: Soboyejo, Winston O.
Contributors: Mechanical and Aerospace Engineering Department
Keywords: Drug Eluting Stents
LIGA Ni MEMS Thin Films
Subjects: Mechanical engineering
Materials Science
Issue Date: 2012
Publisher: Princeton, NJ : Princeton University
Abstract: This thesis presents the results of experimental and theoretical studies of important failure modes in small metallic structures. These include failure due to monotonic and cyclic loading, and cohesive and adhesive failure of small structures. First, a novel micro-beam technique is used to study short crack growth in stainless steel. Micro-testing techniques and fracture mechanics models are then used to elucidate the mechanisms for fatigue crack initiation or "pop in" in LIGA Ni MEMS thin films. Finally, a new micro-scale push-out test technique is developed and applied to the measurement of the adhesive and cohesive strengths of drug eluting stent (DES) structures. The degradation of the DES is then investigated under conditions that simulate physiological environments. The implications of the results are discussed for the robust structures with micro-scale dimensions.
Alternate format: The Mudd Manuscript Library retains one bound copy of each dissertation. Search for these copies in the library's main catalog
Type of Material: Academic dissertations (Ph.D.)
Language: en
Appears in Collections:Mechanical and Aerospace Engineering

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