Volume 21, Issue 9 (September 2021)
Modares Mechanical Engineering 2021, 21(9): 589-600 |
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shahryarifard M, Golzar M, Tibert G. Modeling Bistable Behaviors in Exposure of Thermo-Viscoelastic Conditions by Link-Spring-Dashpot Structures. Modares Mechanical Engineering 2021; 21 (9) :589-600
URL: http://mme.modares.ac.ir/article-15-47083-en.html
URL: http://mme.modares.ac.ir/article-15-47083-en.html
1- Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
2- Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran ,m.golzar@modares.ac.ir
3- Department of Engineering Mechanics, KTH University,Stockholm, Sweden
2- Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran ,
3- Department of Engineering Mechanics, KTH University,Stockholm, Sweden
Abstract: (1650 Views)
Bistable composites have gained increased attentions in industry, especially in the aerospace industry, due to their unique feature of shape-changing without the need for continuous energy. The advantage of using these structures is their ability to package in small size, whilst deploying in long lengths and high stiffness ratio along the length. This unique feature, along with the advantages of other fiber reinforced composites such as high strength, light weight and high rigidity, has made them a good choice for many applications such as deployable booms and antennas for satellites.
In this paper, the bistablility of shell structures at different time-temperature conditions are investigated. To explain the mechanical behavior of the Bistable Tape Springs (BiTSs) in different conditions, an analogous 2D model consist of rigid linkages, elastic springs and viscous dampers is proposed. The relationships between the force and energy through the transition path for the 2D model were established and the non-dimensional strain energy paths for different initial parameters were obtained, accordingly. As a case study, four BiTSs made of composite materials are fabricated and subjected to a particular thermo-viscoelastic condition to verify all stability behaviors of the 2D LSD model under thermo-viscoelastic conditions.
In this paper, the bistablility of shell structures at different time-temperature conditions are investigated. To explain the mechanical behavior of the Bistable Tape Springs (BiTSs) in different conditions, an analogous 2D model consist of rigid linkages, elastic springs and viscous dampers is proposed. The relationships between the force and energy through the transition path for the 2D model were established and the non-dimensional strain energy paths for different initial parameters were obtained, accordingly. As a case study, four BiTSs made of composite materials are fabricated and subjected to a particular thermo-viscoelastic condition to verify all stability behaviors of the 2D LSD model under thermo-viscoelastic conditions.
Keywords: bistable, composite, thermo-viscoelastic, link-spring-dashpot, non-dimensional strain energy
Article Type: Original Research |
Subject:
Aerospace Structures
Received: 2020/10/25 | Accepted: 2021/04/28 | Published: 2021/09/1
Received: 2020/10/25 | Accepted: 2021/04/28 | Published: 2021/09/1
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