Experimental and Numerical Investigation of Mechanical and Thermal Effects in TiNi SMA during Transformation-Induced Creep Phenomena

Autor: Vladimir Dunić, Ryosuke Matsui, Zbigniew L. Kowalewski, Radovan Slavković, Elzbieta A. Pieczyska
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Materials science
02 engineering and technology
lcsh:Technology
Article
Stress (mechanics)
0203 mechanical engineering
thermo-mechanical coupled numerical analysis
temperature change
General Materials Science
TiNi shape memory alloy
Composite material
lcsh:Microscopy
lcsh:QC120-168.85
lcsh:QH201-278.5
lcsh:T
infrared camera
Shape-memory alloy
021001 nanoscience & nanotechnology
SMA
thermomechanical couplings
martensitic transformation
020303 mechanical engineering & transports
Creep
lcsh:TA1-2040
Martensite
Diffusionless transformation
Volume fraction
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
Deformation (engineering)
0210 nano-technology
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
phase transformation-induced creep
Zdroj: Materials
Volume 12
Issue 6
Materials, Vol 12, Iss 6, p 883 (2019)
ISSN: 1996-1944
DOI: 10.3390/ma12060883
Popis: (1) The paper presents experimental and numerical results of the TiNi shape memory alloy (SMA) subjected to a modified program of force-controlled tensile loading. The time-dependent development of transformation strain under the constant-force conditions was investigated to describe transformation-induced creep phenomena. (2) Mechanical characteristics of the TiNi SMA were derived using a testing machine, whereas the SMA temperature changes accompanying its deformation were obtained in a contactless manner with an infrared camera. A 3D coupled thermo-mechanical numerical analysis, realized in a partitioned approach, was applied to describe the SMA mechanical and thermal responses. (3) The stress and related temperature changes demonstrated how the transformation-induced creep process started and evolved at various stages of the SMA loading. The proposed model reproduced the stress, strain and temperature changes obtained during the experiment well
the latent heat production is in correlation with the amount of the martensitic volume fraction. (4) It was demonstrated how the transformation-induced creep process occurring in the SMA under such conditions was involved in thermo-mechanical couplings and the related temperature changes.
Databáze: OpenAIRE
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