Partner: Ryosuke Matsui

Aichi Institute of Technology (JP)

Ostatnie publikacje
1.Matsui R., Takeda K., Tobushi H., Pieczyska E.A., Mechanical properties and advanced subjects in shape memory alloys and polymers, JOURNAL OF THEORETICAL AND APPLIED MECHANICS, ISSN: 1429-2955, DOI: 10.15632/jtam-pl.56.2.447, Vol.56, No.2, pp.447-456, 2018

Streszczenie:

Advanced subjects in mechanical properties of shape memory alloys and polymers are discussed. In the subloop loading under a stress-controlled condition of the shape memory alloy, the transformation-induced stress relaxation appears due to variation in temperature. The enhancement of corrosion and corrosion fatigue life of the shape memory alloy is discussed. The development of a functionally-graded shape memory alloy and polymer is expected to obtain better performance. Three-way motion appears in the shape memory composite with the shape memory alloy and polymer.

Słowa kluczowe:

shape memory alloy, shape memory polymer, functionally-graded shape memory material, shape memory composite

Afiliacje autorów:

Matsui R.-Aichi Institute of Technology (JP)
Takeda K.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
15p.
2.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Torsional deformation properties of SMA tapes and their application to bias-type reciprocating rotary driving actuator, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.69, No.4-5, pp.289-303, 2017

Streszczenie:

In order to develop the reciprocating rotary driving actuator with a simple mechanism using shape memory alloy (SMA) tapes, the graphical method to design the actuator was proposed based on the torsional deformation properties of SMA tapes. The torsional deformation properties of the SME tape showing the shape memory effect (SME) and the SE tape showing superelasticity (SE) were obtained. The bias-type reciprocating rotary actuator was composed of the pretwisted SME tape and the flat SE tape in series. The design chart expressed by the relationship between torque and twisting angle of the SME tape and the SE tape was proposed. The rotational angle and torque, which vary depending on temperature, can be estimated based on the design chart. The rotational angle is controlled by adjusting the mounting angle of the SME tape and the heating temperature. The automatically opening and closing blind driven by sunlight was demonstrated. The blind was controlled by using the reciprocating rotary element composed of the SME tape and the SE tape. The behavior of the blind can be achieved based on the proposed design method of the reciprocating rotary driving element

Słowa kluczowe:

shape memory alloy, tape, torsion, actuator, reciprocating rotation, design chart, bias-type

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
25p.
3.Takeda K., Matsui R., Tobushi H., Homma S., Levintant-Zayonts N., Kucharski S., Enhancement of bending fatigue life in TiNi shape-memory alloy tape by nitrogen ion implantation, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.67, No.4, pp.293-310, 2015

Streszczenie:

A shape-memory alloy (SMA) is expected to be applied as intelligent or smart material since it shows the functional characteristics of the shape memory effect and superelasticity. Most SMA elements, with these characteristics, perform cyclic motions. In these cases, the fatigue property of SMA is one of the most important issues in view of evaluating functional characteristics of SMA elements. The fatigue properties are complex since they depend on stress, strain, temperature and their hysteresis. If an SMA is implanted with high-energy ions, the thermomechanical properties of the material may change, resulting in long fatigue life. In the present study, the nitrogen ion implantation was applied to modify the surface of a TiNi SMA tape and the influence of implantation treatment on the bending fatigue properties was investigated.

Słowa kluczowe:

shape-memory alloy, titanium-nickel alloy, superelasticity, nitrogen ion implantation, fatigue, bending

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Homma S.-Nippon Trex Co. (JP)
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
20p.
4.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Transformation-Induced Relaxation and Stress Recovery of TiNi Shape Memory Alloy, Materials, ISSN: 1996-1944, DOI: 10.3390/ma7031912, Vol.7, pp.1912-1926, 2014

Streszczenie:

The transformation-induced stress relaxation and stress recovery of TiNi shape memory alloy (SMA) in stress-controlled subloop loading were investigated based on the local variation in temperature and transformation band on the surface of the tape in the tension test. The results obtained are summarized as follows. (1) In the loading process, temperature increases due to the exothermic martensitic transformation (MT) until the holding strain and thereafter temperature decreases while holding the strain constant, resulting in stress relaxation due to the MT; (2) In the unloading process, temperature decreases due to the endothermic reverse transformation until the holding strain and thereafter temperature increases while holding the strain constant, resulting in stress recovery due to the reverse transformation; (3) Stress varies markedly in the initial stage followed by gradual change while holding the strain constant; (4) If the stress rate is high until the holding strain in the loading and unloading processes, both stress relaxation and stress recovery are large; (5) It is important to take into account this behavior in the design of SMA elements, since the force of SMA elements varies even if the atmospheric temperature is kept constant.

Słowa kluczowe:

shape memory alloy, superelasticity, titanium-nickel alloy, subloop, stress relaxation, stress recovery, martensitic transformation

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
35p.
5.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Creep and creep recovery under stress-controlled subloop loading in TiNi shape memory alloy, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.65, No.5, pp.429-444, 2013

Streszczenie:

If a shape memory alloy (SMA) is subjected to the subloop loading under the stress-controlled condition, creep and creep recovery can appear based on the martensitic transformation. In the design of SMA elements, these deformation properties are important since the deflection of SMA elements can change under constant load. The conditions for the progress of the martensitic transformation are discussed based on the kinetics of the martensitic transformation for the SMA. The creep deformation properties are investigated experimentally for TiNi SMA. The creep strain rate increases in proportion to the martensitic transformation strain; the creep recovery strain rate increases in proportion to the reverse transformation strain.

Słowa kluczowe:

shape memory alloy, superelasticity, subloop, transformation band, creep, creep recovery, strain rate, local deformation

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
20p.

Lista ostatnich monografii
1.
312
Tobushi H., Matsui R., Takeda K., Pieczyska E.A., Mechanical Properties of Shape Memory Materials, Nova Science Publishers, Inc., 400 Oser Avenue, Suite 1600, Hauppauge, N.Y. 11788-3619, USA, pp.1-271, 2013

Abstrakty konferencyjne
1.Staszczak M., Pieczyska E.A., Matsui R., Takeda K., Estimation of energy storage and dissipation in Shape Memory Polymer during its deformation, SolMech 2018, 41st SOLID MECHANICS CONFERENCE, 2018-08-27/08-31, Warszawa (PL), pp.338-339, 2018
2.Pieczyska E.A., Staszczak M., Tobushi H., Takeda K., Matsui R., Hayashi S., Shape memory polymer - influence of temperature, strain rate and the loading history on the stress-strain curves, SolMech 2016, 40th Solid Mechanics Conference, 2016-08-29/09-02, Warszawa (PL), No.P194, pp.1-2, 2016

Streszczenie:

The mechanism of exhibiting shape memory property in polymer is different from that observed in shape memory alloy, since the crystallographic phase transformation does not occur in polymers. The functional characteristics of shape memory polymer (SMP), e.g. rigidity, elastic modulus and coefficient of thermal expansion, change significantly above and below its glass transition temperature (Tg) due to molecular motion of the polymer chains which differs drastically below and above Tg. These properties allow to apply SMP in biomedical, textile, housing, transportation, aviation industries. A goal of this paper is to discuss selected results of the SMP investigation and demonstrate how significantly its mechanical properties change in various conditions; influence of temperature, strain rate and loading history were taken into consideration.

Słowa kluczowe:

Shape memory polymer, tensile test, strain rate, temperature change

Afiliacje autorów:

Pieczyska E.A.-IPPT PAN
Staszczak M.-IPPT PAN
Tobushi H.-Aichi Institute of Technology (JP)
Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Hayashi S.-SMP Technologies Inc. (JP)
3.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Subloop deformation of shape memory alloy, SolMech 2016, 40th Solid Mechanics Conference, 2016-08-29/09-02, Warszawa (PL), No.P059, pp.1-2, 2016

Streszczenie:

Shape memory alloys (SMAs) are remarkable materials characterized by the thermomechanical properties of shape memory effect and superelasticity. Since the properties like these characteristics are highly conducive to the functions of smart materials, their applications have attracted worldwide attention. The functional properties of an SMA appear based on the martensitic transformation (MT). Research up to now in this area has been mainly concerned with a full loop (or perfect loop) of the MT completion. However, in practical applications, temperature and stress are likely to vary in various ranges. If SMA elements are subjected to loads with a subloop (or partial loop, internal loop) in which temperature or stress varies in an incomplete MT range, the conditions for the start and finish of the MT as in a full loop are not satisfied. The present paper investigates superelastic deformation behaviors of TiNi alloy in various subloop loading conditions, in particular the dependence of the subloop deformation on the loading rate, and the characteristics of transformation-induced creep in the stress plateau region under constant stress.

Słowa kluczowe:

Shape memory alloy, subloop deformation, temperature distribution, pseudoelastic behaviour

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
4.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Design of rotary driving actuator by using torsional deformation of SMA tapes, SolMech 2016, 40th Solid Mechanics Conference, 2016-08-29/09-02, Warszawa (PL), No.P057, pp.1-2, 2016

Streszczenie:

One of the main materials which have activated the research on the smart materials is shape memory alloy (SMA). The main characteristics of SMA are the shape memory effect (SME) and superelasticity (SE). In a recent study using the torsional deformation of a TiNi SMA tube, twist in the blades of rotary aircraft was investigated in order to improve the flight performance. In practical applications making use of SMA tapes, torsional deformation can be obtained simply by gripping both ends without any mechanical process. In the present study, in order to develop the rotary driving actuators of SMA tapes, the torsional deformation properties of TiNi SMA tapes are investigated. The graphical method to design the two-way rotary driving actuator by using torsional deformation of SMA tapes is proposed.

Słowa kluczowe:

Shape memory alloy, torsion, rotary driving, actuator

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN
5.Takeda K., Matsui R., Tobushi H., Pieczyska E., Transformation-Induced Creep and Relaxation of TiNi Shape Memory Alloy, PCM-CMM 2015, 3rd Polish Congress of Mechanics and 21st Computer Methods in Mechanics, 2015-09-08/09-11, Gdańsk (PL), pp.151-152, 2015

Streszczenie:

If the shape memory alloy (SMA) is subjected to the subloop loading under the stress- or strain-controlled condition, transformationinduced creep or relaxation can appear based on the martensitic transformation (MT). In the design of SMA elements, these deformation properties are important since the deflection or force of SMA elements can change under constant load or constant strain. The conditions for the progress of the MT are discussed based on the kinetics of the MT for the SMA. The creep and relaxation properties are investigated experimentally for TiNi SMA. If the stress is kept constant at the upper stress plateau after loading with a high strain or stress rate up to the stress-holding start strain, the transformation-induced creep occurs due to the spread of the stress-induced martensitic transformation process. If the strain is kept constant at the upper stress plateau after loading with a high stress rate, the transformation-induced relaxation appears due to the exothermic MT until the holding strain and thereafter temperature decreases while holding the strain constant.

Słowa kluczowe:

shape memory alloy, superelasticity, transformation-induced creep, transformation-induced relaxation

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.-IPPT PAN
6.Takeda K., Matsui R., Tobushi H., Levintant-Zayonts N., Kucharski S., Deformation and fatigue properties of nitrogen ion implanted TiNi shape memory alloy, SolMech 2014, 39th Solid Mechanics Conference, 2014-09-01/09-05, Zakopane (PL), pp.269-270, 2014
7.Takeda K., Matsui R., Tobushi H., Pieczyska E.A., Stress relaxation and stress recovery of tini shape memory alloy in stress-controlled subloop loading, SolMech 2014, 39th Solid Mechanics Conference, 2014-09-01/09-05, Zakopane (PL), pp.271-272, 2014

Streszczenie:

Shape memory polymers (SMP) are new unique and attractive materials which demonstrate shape memory properties. It means that the materials, as a result of an external stimulus such as temperature, can recover their original (permanent) shape from deformed (temporary) shape. The mechanical characteristics of SMP, e.g. the elastic modulus and the yield stress, change significantly below and above their glass transition temperature Tg. It can be explained by differences of molecular motion of the polymer chains below and above Tg [1, 2]. Two phenomena due to this can be observed in the SMP. The first one is a shape fixity which means that it is possible to fix a temporary shape by cooling the deformed SMP below Tg. The second phenomenon, called a shape recovery, denotes the property that the original shape, changed due to deformation, is recovered during subsequent heating above the SMP Tg temperature. Preliminary estimation of these two parameters, crucial to assess SMP potential applications, is the subject of this paper [1].

Słowa kluczowe:

Shape memory polymers, elastic modulus, yield stress, glass transition temperature, shape fixity, shape recovery

Afiliacje autorów:

Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Pieczyska E.A.-IPPT PAN