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Open research questions in Composite Structure Analysis and Optimization

87 gap statements mined from Composite Structure Analysis and Optimization papers in our 4.5M-paper local library, which holds 1,946 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • There is a need to investigate the influence of material composition on free vibration of bidirectional functionally graded beams. The existing theories have limitations in predicting the free vibration of bidirectional functionally graded beams.

    EFFECT OF MATERIAL COMPOSITION ON FREE VIBRATION OF BIDIRECTIONAL FUNCTIONALLY GRADED BEAM VIA A QUASI-3D THEORY · 2026 · DOI

  • The interaction effects between gradient indexes nx and nz on higher-order modes (beyond the fundamental frequency) of bidirectional FG beams have not been systematically characterized across the full range of gradient parameters.

    EFFECT OF MATERIAL COMPOSITION ON FREE VIBRATION OF BIDIRECTIONAL FUNCTIONALLY GRADED BEAM VIA A QUASI-3D THEORY · 2026 · DOI

  • The current approaches do not fundamentally resolve the geometric incompatibility between a planar blank and a compound-curvature surface. Wrinkling and shear-induced thickness variations are persistent challenges in compound-curvature geometries.

    Application of a Discrete Finite Element Modeling Approach to Form a Near-Uniform Thickness Compound Curvature Composite Part · 2026 · DOI

  • The lack of discussion on plate-like frequencies in prior studies. The need for a qualitative analysis of the frequencies and vibration modes of prismatic shells with a square cross section.

    Free Vibrations of Prismatic Shells with a Square Cross Section · 2026 · DOI

  • The buckling analysis of BIFG plates explores novel combinations of grading indices, aspect ratios and boundary conditions that have not been explored before.

    A simple refined plate theory for buckling problems of in-plane bidirectional functionally graded plates under various boundary conditions · 2026 · DOI

  • The complexity of the problem requires a thorough analysis of the crack compliance and natural frequencies of cracked functionally graded beams. The need to validate the theoretical development by comparison of the numerical results computed hereby with those published earlier in the literature.

    Coupled effect of crack and temperature on free vibration of functionally graded beams · 2026 · DOI

  • The problem of cracked FGM structures has received increasing attention from engineers and researchers. There is a need to investigate the coupled effect of crack and temperature on free vibration of functionally graded beams.

    Coupled effect of crack and temperature on free vibration of functionally graded beams · 2026 · DOI

  • The paper suggests that future research should focus on the development of new beam theory models and numerical techniques for vibration analysis of composite materials. The use of natural fiber composite materials and their potential benefits should also be further explored.

    Dynamic and vibration analysis of beam, plates, and shells on composites materials – a literature review · 2026 · DOI

  • The paper identifies a gap in the existing research on vibration analysis of composite materials, highlighting the need for a comprehensive summary of the field. The review also identifies a need for further research on the use of natural fiber composite materials and their potential benefits.

    Dynamic and vibration analysis of beam, plates, and shells on composites materials – a literature review · 2026 · DOI

  • Existing finite elements have limitations in accurately modeling functionally graded material plates. There is a need for a novel strain-based rectangular plate finite element that can accurately analyze thin isotropic and functionally graded plates.

    A strain-based rectangular finite element for accurate static and free vibration analysis of thin isotropic and functionally graded plates · 2026 · DOI

  • The framework is limited to Euler-Bernoulli and Timoshenko cantilever beams. The certified upper bounds are mode-specific and require a small trial space. The framework assumes small transverse deflections and standard EB kinematics.

    Certified Eigenfrequency Bounds for Euler–Bernoulli and Timoshenko Cantilever Beams with Tip Mass, Rotary Inertia, and a Rotational Spring · 2026 · DOI

  • The study identifies a gap in the literature by revealing that no previous study of this kind has been conducted. The study aims to fill this gap by analyzing the thermomechanical vibration behavior of doubly curved sandwich shallow shells.

    Thermomechanical postbuckled vibration response of doubly curved sandwich shallow shells with FGM core layer and hybrid face layers · 2026 · DOI

  • The study is limited to the analysis of laminated hybrid composite beams with specific stacking sequences and geometric perforations. The study uses a computational program and finite element analyses, which may have limitations in terms of accuracy and applicability.

    Numerical Buckling Analysis of Laminated Hybrid Composites and Investigation of Perforated Structures · 2026 · DOI

  • Future research could investigate the influence of other parameters on the buckling behavior of laminated composite beams. Future research could also explore the application of the computational program and finite element analysis approach to other types of composite beams.

    Numerical Buckling Analysis of Laminated Hybrid Composites and Investigation of Perforated Structures · 2026 · DOI

  • The lack of models that account for hysteresis-type elastic-dissipative characteristics of materials. The need for a comprehensive analysis of the dynamic behavior of perforated plates.

    Modeling of a perforated plate with hysteresis type characteristics under kinematic excitations · 2026 · DOI

  • The optimization procedure for composite sandwich structures becomes more complex when multiple discrete design variables and nonlinear material behavior are involved. The need for a computationally efficient optimization procedure for the investigated sandwich structure. The lack of a diverse set of optimal design solutions for the investigated sandwich structure.

    Multi-Objective Optimization of a Composite FRP Laminated Sandwich Structure Using Artificial Neural Network and Particle Swarm Optimization Algorithm · 2026 · DOI

  • The study does not consider the effect of advanced shear correction on the thermal shock. The study is limited to a specific range of parameters, such as M∞ = 2, T1 = 100 K.

    Thermal-vibration of FGM plates-shells in nonlinear un-steady-supersonic air-flow · 2026 · DOI

  • The lack of consideration of advanced shear correction on the thermal shock. The limited understanding of thermal-vibration of FGM plates-shells in nonlinear un-steady-supersonic air-flow.

    Thermal-vibration of FGM plates-shells in nonlinear un-steady-supersonic air-flow · 2026 · DOI

  • There is a lack of research into the vibrations of rods of variable cross-section using effective numerical calculation methods. Traditional analytical methods have limited application for real objects with complex geometry and variable stiffness.

    Determination of dynamic characteristics of rods of shipbuilding structures · 2026 · DOI

  • Existing finite elements may not provide accurate results for plate analysis, especially in the presence of mesh distortion. There is a need for a reliable and computationally efficient solution for plate analysis in practical engineering problems.

    DEVELOPMENT AND NUMERICAL EVALUATION OF A NEW STRAIN-BASED FOUR-NODE FINITE ELEMENT FOR KIRCHHOFF PLATE ANALYSIS · 2026 · DOI

  • The study assumes that the angle between adjacent faces remains constant during deformation.

    Free Vibrations of Prismatic Shells with a Square Cross Section · 2026 · DOI

  • It is difficult to obtain exact solutions for FG anisotropic beams due to material inhomogeneity, tension-shear coupling and other effects. Many conventional shear functions fail to accurately predict the shear deformation behavior of FG beams.

    Analytical Solutions of FG Anisotropic Beams in Plane Elasticity · 2026 · DOI

  • The analysis provides a novel approach to designing FGM sandwich plates for various applications.

    Design and Thermal Elastic Behavior of FGM Sandwich Plate with TPMS Core Layer · 2026 · DOI

  • Further research could investigate the application of the optimization methodology to other types of sandwich structures - The use of other optimization algorithms could be…

    Multi-Objective Optimization of a Composite FRP Laminated Sandwich Structure Using Artificial Neural Network and Particle Swarm Optimization Algorithm · 2026 · DOI

  • The study of how to properly scale the ABH geometry at low frequencies. The investigation of the application of ABHs in full-scale marine structures. The exploration of the use of multiple ABHs to enhance performance at higher frequencies.

    Low-frequency structural vibration reduction in stiffened panels using integrated acoustic black holes · 2026 · DOI

Most-cited papers in Composite Structure Analysis and Optimization

Most recent work

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Open questions raised by papers listed on this page include: (1) There is a need to investigate the influence of material composition on free vibration of bidirectional functionally graded beams (“EFFECT OF MATERIAL COMPOSITION ON FREE VIBRATION OF BIDIRECTIONAL FUNCTIONALLY…”, 2026); (2) The lack of discussion on plate-like frequencies in prior studies (“Free Vibrations of Prismatic Shells with a Square Cross Section”, 2026); (3) The buckling analysis of BIFG plates explores novel combinations of grading indices, aspect ratios and boundary conditions that have not been explored before (“A simple refined plate theory for buckling problems of in-plane bidirectional…”, 2026); (4) There is a need to investigate the coupled effect of crack and temperature on free vibration of functionally graded beams (“Coupled effect of crack and temperature on free vibration of functionally…”, 2026); (5) The paper suggests that future research should focus on the development of new beam theory models and numerical techniques for vibration analysis of composite materials (“Dynamic and vibration analysis of beam, plates, and shells on composites…”, 2026). 87 gap statements have been mined from Composite Structure Analysis and Optimization papers in our 4.5M-paper local library, which holds 1,946 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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