Shape memory polymer S-shaped mandrel for composite air duct manufacturing

Du, Haiyang; Liu, Liwu; Leng, Jinsong; Peng, Hua-Xin; Scarpa, Fabrizio; Liu, Yanju

doi:10.1016/j.compstruct.2015.08.005

Cited by 29 publications

(22 citation statements)

References 39 publications

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“…That is, heating can soften the mandrel so that it can be extracted from the part. Du et al studied a shape memory polymer mandrel that can be used to form composite parts with complex structures [20,21]. The matrix material of the mandrel is styrene, and the mandrel will gradually soften when heated.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Mandrel for Manufacturing Composite Components with Complex Structure

Jing

Chen

et al. 2021

Aerospace

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This study was to solve the mandrel demolding problem after curing the composite component with complex structure. In this paper, a reusable thermoplastic mandrel with heating softening characteristics was developed by resin transfer molding (RTM). The glass transition temperature (Tg), surface roughness, and reusability of the mandrel, as well as the shape, surface roughness, thickness uniformity, and internal quality of the formed structure, were tested. The result showed that the Tg of the mandrel was between 80 and 90 °C and the surface roughness was less than Ra 0.5 μm. Additionally, the mandrel can be recycled and can still maintain a good shape after 20 times of deformation. By using this method, the demolding process can be realized by heating and softening the mandrel. The profile error of the formed structure was within 0.5 mm, the surface roughness was less than Ra 0.5 μm, the thickness error was within 0.2 mm, and the average porosity of the upper and lower halves of composite parts was 0.72% and 0.61%. All those data showed that the formed part was in good shape and of good quality. The thermoplastic mandrel can solve the demolding problem of composite materials with complex shapes.

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Section: Introductionmentioning

confidence: 99%

Thermoplastic Mandrel for Manufacturing Composite Components with Complex Structure

Jing

Chen

et al. 2021

Aerospace

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“…However, few studies were done on the rotary mandrels which are used for manufacturing the rotary composite parts. Du et al 12 presented a new concept of shape memory polymer mandrel to manufacture a complex-shaped composite air duct and studied the shape recovery and overall deformation behavior due to the combination of pressure and temperature profiles used during the molding. Kumar et al 13 presented the design, analysis, and manufacture of an AFP mandrel for composite aircraft fuselage skin fabrication.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of the mandrel structure for a composite S-shaped inlet

Hao

Jiang

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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Automated fiber placement (AFP) combining with the autoclave curing process is the main manufacturing method for large-scale rotary composite parts. During the forming process, the mandrel plays an important role that affects the forming quality of the part directly. In this study, design and analysis of the mandrel structure for a composite S-shaped inlet are carried out. The preforming process of the rotary composite part using the AFP technique is introduced first. Then, design principles of the shaft are presented and applied to the shaft design for the mandrel of the S-shaped inlet, which then is transformed into an optimization problem. The internal penalty function method is adopted to solve this optimization problem in order to obtain the optimal axis position and axle diameter. Moreover, detailed structure design of the mandrel is proposed which takes the demolding into consideration, and the wall thickness is designed considering the total weight and the stiffness. The static analysis and modal analysis are also carried out by the finite element method to verify the feasibility of the proposed mandrel structure.

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“…In order to improve stiffness and strength, SMP composites, which are filled with particles, carbon nanotubes, and short fibers, are investigated (Basit et al, 2012; Lan et al, 2014; Sun et al, 2015; Yu et al, 2014; Zhou et al, 2016). Now, SMP composites and their products, such as deployable and morphing structures, have been developed (Du et al, 2015; Tan et al, 2014; Wei et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Investigation of intelligent reversible diaphragm using shape memory polymers

Tao

Yang

Liu

et al. 2017

Journal of Intelligent Material Systems and Structures

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This article describes design and analysis of a novel reversible diaphragm using shape memory polymer. The reversible diaphragm could be applied to space engineering, such as propellant tank of rocket. The shape memory polymer diaphragm can automatically recover to the initial state after the overturning deformation and thus can be used repeatedly. A three-dimensional model is established to study the overturning and recovery behavior of the shape memory polymer diaphragm.The nonlinear finite element method based on the thermodynamic constitutive equations of shape memory polymer is used to obtain pressure -displacement relations and strain energy variation of SMP diaphragm with approximately hemispherical shape in the whole process of the overturning deformation. The influence of structural parameters and temperature on the overturning and recover behavior is discussed.

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Shape memory polymer S-shaped mandrel for composite air duct manufacturing

Cited by 29 publications

References 39 publications

Thermoplastic Mandrel for Manufacturing Composite Components with Complex Structure

Thermoplastic Mandrel for Manufacturing Composite Components with Complex Structure

Design and analysis of the mandrel structure for a composite S-shaped inlet

Investigation of intelligent reversible diaphragm using shape memory polymers

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