Evaluation of superelastic nitinol as a shielding material for hypervelocity impact

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dc.contributor.advisorBarrera, Enrique V.en_US
dc.creatorEspinoza Magana, Nancyen_US
dc.date.accessioned2009-06-04T06:45:00Zen_US
dc.date.available2009-06-04T06:45:00Zen_US
dc.date.issued1999en_US
dc.description.abstractSuperelastic Nitinol Shape Memory Alloy (SMA) as a shielding material for hypervelocity impact is investigated. Impact peak pressures from Rankine-Hugoniot equations and empirical figures of merit, which give a general evaluation of this material as a nickel titanium alloy, have been derived. Superelastic Nitinol was impacted at oblique and normal incidence using a two-stage light-gas gun and was evaluated as an intermediate layer in the Stuffed Whipple configuration and as bumper in the Whipple configuration. Its performance during oblique impacts is better than that of Kevlar and Al2024-T3. Superelastic SMA can dissipate impact energy through a martensitic phase transformation and through plastic yielding. Differential scanning calorimeter studies demonstrated that stress induced Martensite (SIM) is present in the hypervelocity impacted samples. Optical metallography and electron microscopy studies confirm the presence of SIM.en_US
dc.format.extent80 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS M.E. 1999 ESPINOZAen_US
dc.identifier.citationEspinoza Magana, Nancy. "Evaluation of superelastic nitinol as a shielding material for hypervelocity impact." (1999) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17262">https://hdl.handle.net/1911/17262</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/17262en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectAerospace engineeringen_US
dc.subjectMaterials scienceen_US
dc.titleEvaluation of superelastic nitinol as a shielding material for hypervelocity impacten_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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