On the behaviors of porous shape memory alloy beam with gradient porosity under pure bending

An analytical research is developed using the averaging technique of composites for the macroscopic behaviors of porous shape memory alloy (SMA) beam with different porosity under pure bending. The whole material is regarded as a composite beam of porous SMA and dense SMA, in which the component fra...

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Bibliographic Details
Published in:Journal of materials research 2019-01, Vol.34 (2), p.282-289
Main Authors: Zhang, Yanan, Liu, Bingfei, Du, Chunzhi, Zhou, Rui
Format: Article
Language:English
Subjects:
Alloys
Applied and Technical Physics
Biocompatibility
Biomaterials
Composite beams
Composite materials
Computer simulation
Elastoplasticity
Inorganic Chemistry
Martensitic transformations
Materials Engineering
Materials research
Materials Science
Mechanical properties
Nanotechnology
Phase transitions
Plasma sintering
Porosity
Porous materials
Product design
Regression analysis
Shape memory alloys
Stents
Stress concentration
Stress distribution
Tissues
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Summary:An analytical research is developed using the averaging technique of composites for the macroscopic behaviors of porous shape memory alloy (SMA) beam with different porosity under pure bending. The whole material is regarded as a composite beam of porous SMA and dense SMA, in which the component fractions of the porous SMA show gradient changes over geometric dimension. To get the theoretical solution of such material under pure bending, the Mises yield theory and the ideal elastoplastic model are used to describe the phase transition of the material. The macroscopic behaviors of the porous SMAs beam with different porosity are then simulated using the averaging technique of composites. Examples for a porous SMA beam with gradient porosity from 0 to 50% considering the tension compression asymmetry of the SMAs are then supplied; the results show that after transformation the stress distribution in the whole material is lower than in the case of the pure elastic gradient porous materials, and for different part of the SMA with different porosity shows different strength characters.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2018.423