Manufacturing method for high-amplitude corrugated thin-walled laminates

Filipovic, Daniel; Kress, Gerald

doi:10.1016/j.compstruct.2019.110925

Cited by 17 publications

(6 citation statements)

References 14 publications

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“…A planar FEM formulation for simulating the response of corrugated laminates to transverse shear line force was developed by Filipovic and Kress [15]. The question of how to manufacture high-amplitude corrugated laminates with circularsections corrugation shape was addressed by Filipovic and Kress [16].…”

Section: General Investigations Of Corrugated Laminatesmentioning

confidence: 99%

“…Dayyani and Friswell [36] considered static as well as aerodynamic aspects within their multi-objective optimization for the geometry of trapezoidal corrugated morphing skins. Filipovic and Kress [16] suggested a corrugation design and manufacturing method for corrugated laminates with a circular-sections corrugation shape and added scales for an aerodynamically smooth surface.…”

Section: Flexible Skin In Morphing-wing Designmentioning

confidence: 99%

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Free-edge effects of corrugated laminates

Filipovic

Kress

2020

Curved and Layered Structures

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Due to their high numerical efficiency, homogenization models are often employed in the analysis of corrugated laminates. They are usually derived assuming periodic behavior in the corrugated direction and generalized plane strain in the out-of-plane direction, which corresponds to the assumption of infinite dimensions of the structure. As a consequence, any influences of edge effects are not mapped, although they can have a significant impact on the mechanical behavior of a given structure. The objective of this manuscript is to investigate the influence of boundary conditions - a combination of free-edges and clamping - on the structural stiffness of corrugated laminates. A total of six load cases are investigated which correspond to the line loads considered in the classical theory of laminated plates. The results of this parameter study allow the identification of several critical loading situations, where free edges can significantly alter structural stiffness. The given investigations hence contribute to the investigation of the validity range of homogenization models.

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Section: General Investigations Of Corrugated Laminatesmentioning

confidence: 99%

Section: Flexible Skin In Morphing-wing Designmentioning

confidence: 99%

Free-edge effects of corrugated laminates

Filipovic

Kress

2020

Curved and Layered Structures

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“…Flat plates (triangular, rectangular, trapezoidal)-References [237][238][239][240][241][242][243][244][245], • Panels: cylindrical [246][247][248][249][250][251][252][253][254][255], spherical [256,257], truncated conical [258][259][260][261][262][263], • Cylindrical shells-References [264][265][266][267][268][269][270].…”

Section: Form Of the Structurementioning

confidence: 99%

Optimal Design of Plated/Shell Structures under Flutter Constraints—A Literature Review

2019

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Aeroelastic optimization has become an indispensable component in the evaluation of divergence and flutter characteristics for plated/shell structures. The present paper intends to review the fundamental trends and dominant approaches in the optimal design of engineering constructions. A special attention is focused on the formulation of objective functions/functional and the definition of physical (material) variables, particularly in view of composite materials understood in the broader sense as not only multilayered laminates but also as sandwich structures, nanocomposites, functionally graded materials, and materials with piezoelectric actuators/sensors. Moreover, various original aspects of optimization problems of composite structures are demonstrated, discussed, and reviewed in depth.

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“…One side of the ridged design was filled with SMP to guarantee a smooth aerodynamic surface. Although the aerodynamic performance of the corrugated sheet skin was comparable to some streamlined airfoils in sections with a particular Reynolds number, ensuring its smooth continuity was still a challenge [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Design of a Morphing Skin with Shape Memory Alloy Based on Equivalent Thermal Stress Approach

Zhang

Gao

et al. 2022

Micromachines

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Shape memory alloy (SMA) is one of the potential driving devices for morphing aircraft due to its advantages of pseudoelasticity, superelasticity, and shape memory effect. Precise and fast analysis of SMA has simultaneously become a key requirement for industrial applications. In this study, a user-defined material subroutine (UMAT) was implemented and successfully applied in a three-dimensional numerical simulation in ABAQUS based on the extended Boyd–Lagoudas model. In addition to the conventional detwinned martensite (Md) and austenite (A), twinned martensite (Mt) was also considered to model the practical transformation accurately. Then, the equivalent thermal strain approach was adopted to simplify the simulation complexity with UMAT. By resetting the thermal expansion coefficient, the thermal strain equivalent to the original phase transformation strain was generated. The approach was validated in two cases, showing consistent results with the extended Boyd–Lagoudas model and reduction in time consumption by 89.1%. Lastly, an active morphing skin integrating the single-range SMA and a stainless-steel plate was designed to realize two-way morphing. The calculated arc height variation of the skin was 3.74 mm with a relative error of 1.84% compared to the experimental result of 3.81 mm. The coupled use of UMAT and the equivalent thermal stress approach helped to reduce the challenge in modeling SMA.

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Manufacturing method for high-amplitude corrugated thin-walled laminates

Cited by 17 publications

References 14 publications

Free-edge effects of corrugated laminates

Free-edge effects of corrugated laminates

Optimal Design of Plated/Shell Structures under Flutter Constraints—A Literature Review

Design of a Morphing Skin with Shape Memory Alloy Based on Equivalent Thermal Stress Approach

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