Mechanical performances of a thermal activated composite

Gautier, Karine; L’Hostis, Gildas; Laurent, Fabrice; Durand, Bernard

doi:10.1016/j.compscitech.2009.08.004

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Before starting the programming cycle, the CBCM properties of the plate were characterized for a range of temperatures: 80 °C to 150 °C. For active structure, it is usual to define two values when the stimulus is applied: the blocking forces F B which is the maximum load that the plate can support while maintaining its initial configuration, and the free displacement d A which is the maximum displacement that the plate can reach without being loaded [ 30 , 36 ].…”

Section: Materials and Experimental Techniquesmentioning

confidence: 99%

“…We have developed a conventional shape memory composite with 2W-SME by coupling an active composite with an epoxy resin having shape memory property. The Controlled Behavior Composite Material (CBCM) is a morphing thermal active composite, based on the bimetallic strip effect, and generally asymmetric [ 30 , 31 ]. The internal heat source producing the thermal activation of the composite is generated by carbon yarns inserted in the composite (Joule effect).…”

Section: Introductionmentioning

confidence: 99%

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Thermally Activated Composite with Two-Way and Multi-Shape Memory Effects

et al. 2013

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The use of shape memory polymer composites is growing rapidly in smart structure applications. In this work, an active asymmetric composite called “controlled behavior composite material (CBCM)” is used as shape memory polymer composite. The programming and the corresponding initial fixity of the composite structure is obtained during a bending test, by heating CBCM above thermal glass transition temperature of the used Epoxy polymer. The shape memory properties of these composites are investigated by a bending test. Three types of recoveries are conducted, two classical recovery tests: unconstrained recovery and constrained recovery, and a new test of partial recovery under load. During recovery, high recovery displacement and force are produced that enables the composite to perform strong two-way actuations along with multi-shape memory effect. The recovery force confirms full recovery with two-way actuation even under a high load. This unique property of CBCM is characterized by the recovered mechanical work.

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Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermally Activated Composite with Two-Way and Multi-Shape Memory Effects

et al. 2013

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“…An asymmetrical composite behaves as an active composite [19][20]. This active composite works on the principle of internal heating source i. e. the carbon yarns.…”

Section: Introductionmentioning

confidence: 99%

The recovery properties under load of a shape memory polymer composite material

Basit

L’Hostis

Durand

2019

Materialwissenschaft Werkst

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In many applications, shape memory alloys are being replaced by shape memory polymers as they have some better properties than shape memory alloys. Nevertheless, shape memory alloys can recover under load which shape memory polymers cannot. Shape memory polymers are not capable of giving full recovery even lifting a tiny load. The melting temperature or the glass transition temperature is the transition temperatures to which shape memory polymers are closely heated. Then a deforming force up to a certain position is applied to the heated shape memory polymers. After that shape memory polymer is permitted to cool while keeping it deformed. After the cooling, shape memory polymer obtains the temporary shape which can be recovered by reheating it at the similar transition temperature (glass transition or melting). Consequently, it recovers at its initial state. Shape memory polymer can achieve constrained recovery and unconstrained recovery, nonetheless; under stress, it is partly recovered. In current work, recovery under load has been investigated of an asymmetrical shape memory composite. It is established that it is capable to recover under various loads. Under various loads, it shows full recovery in reference to initial state. The ability to recover under load can be potentially used in diverse applications.

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“…CBCM stands for 'controlled behavior composite material'. The CBCM composite itself is an active composite which has already been developed [40,41]. This active composite works with an internal heat source (carbon yarns) that is connected to the electric generator.…”

Section: Introductionmentioning

confidence: 99%

High actuation properties of shape memory polymer composite actuator

Basit¹,

L’Hostis²,

Durand³

2013

Smart Mater. Struct.

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The shape memory polymers (SMPs) possess two shapes: permanent shape and temporary shape. This property leads to replacement of shape memory alloys by SMPs in various applications. In this work, two properties, namely structure activeness and the shape memory property of ‘controlled behavior composite material (CBCM)’ plate and its comparison with the conventional symmetrical composite plate (SYM), are studied. The SMPC plates (CBCM and SYM) are manufactured using epoxy resin with a thermal glass transition temperature (Tg) of 130 °C. The shape memory properties of these composites are investigated (under three-point bending test) and compared by deforming them to the same displacement. Three types of recoveries are conducted: unconstrained recovery, constrained recovery, and partial recovery under load. It is found that by coupling the structure activeness (due to its asymmetry) and its shape memory property, higher activated displacement is obtained during the unconstrained recovery. Also, at a lower recovery temperature (90 °C) than the fixing temperature, a recovery close to 100% is obtained for CBCM, whereas for SYM it is only 25%. During constrained recovery, CBCM produces five times larger recovery force than SYM. In addition, higher actuation properties are demonstrated by calculating recovered work and recovery percentages during partial recovery under load.

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Mechanical performances of a thermal activated composite

Cited by 9 publications

References 13 publications

Thermally Activated Composite with Two-Way and Multi-Shape Memory Effects

Thermally Activated Composite with Two-Way and Multi-Shape Memory Effects

The recovery properties under load of a shape memory polymer composite material

High actuation properties of shape memory polymer composite actuator

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