Christian Hühne
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View article: Manufacturing of ultra-thin thermoplastic TRAC longerons
Manufacturing of ultra-thin thermoplastic TRAC longerons Open
View article: Simulation-based design of mixed-mode specimens for fracture mechanics tests on fiber-metal laminates
Simulation-based design of mixed-mode specimens for fracture mechanics tests on fiber-metal laminates Open
Fiber-metal laminates (FMLs), particularly those composed of glass-fiber-reinforced polymers (GFRP) and steel, are a promising material combination for applications in wind energy, especially in blade root connections. These laminates exhi…
View article: Electric drive systems for multifunctional trailing-edge control surfaces: Dynamic and thermal characterization under simulated flight loads
Electric drive systems for multifunctional trailing-edge control surfaces: Dynamic and thermal characterization under simulated flight loads Open
View article: Screen-Printed Sensor Inlays for Monitoring Bondlines in CFRP-Components
Screen-Printed Sensor Inlays for Monitoring Bondlines in CFRP-Components Open
Adhesive bonding is a promising approach for joining lightweight composite components. However, the reliability remains a major challenge, because failures due to fatigue are difficult. In this study, we report on the integration of a scre…
View article: Structured chaos: redefining the design of buckling-critical cylindrical shells
Structured chaos: redefining the design of buckling-critical cylindrical shells Open
Experimental studies on axially compressed cylindrical shells have historically shown large variability in buckling loads, often challenging existing theoretical models. Our analysis reveals that this scatter follows a structured, regime-d…
View article: Microstructure characterization of fiber composite laminate using eXplainable Artificial Intelligence
Microstructure characterization of fiber composite laminate using eXplainable Artificial Intelligence Open
Composite materials, such as Carbon Fiber Reinforced Plastics (CFRP), are widely used across industries due to their exceptional mechanical properties and lightweight nature. With increasing interest in hydrogen storage applications, a com…
View article: Robotic frame winding: prefabricated fibre structures as formwork and reinforcement for digitally fabricated shell-like concrete elements
Robotic frame winding: prefabricated fibre structures as formwork and reinforcement for digitally fabricated shell-like concrete elements Open
The integration of reinforcement in digital fabrication with concrete has led to the development of various approaches, many of which are constrained by the requirements of the concrete printing process. In contrast, the aim here was to in…
View article: From Digital to Real: Optimised and Functionally Integrated Shotcrete 3D Printing Elements for Multi-Storey Structures
From Digital to Real: Optimised and Functionally Integrated Shotcrete 3D Printing Elements for Multi-Storey Structures Open
The construction industry is facing a dual challenge: an increasing demand for new buildings on the one hand and the urgent need to drastically reduce emissions and waste on the other. One promising field of research to face these challeng…
View article: Zero-stiffness in rolling-lobe air springs for passive, load adaptable and low-frequency vibration isolation
Zero-stiffness in rolling-lobe air springs for passive, load adaptable and low-frequency vibration isolation Open
View article: Temperature distribution inside composite and fiber metal laminates during modified cure cycles
Temperature distribution inside composite and fiber metal laminates during modified cure cycles Open
View article: Equivalent plate formulation of Double–Double laminates for the gradient-based design optimization of composite structures
Equivalent plate formulation of Double–Double laminates for the gradient-based design optimization of composite structures Open
The Double-Double concept of composite laminates suggests huge simplifications in aerospace structural design and manufacturing. This work presents a homogenized composite formulation introducing an analytical DD equivalent plate. Addition…
View article: On the imperfection sensitivity and design of buckling critical wind turbine towers
On the imperfection sensitivity and design of buckling critical wind turbine towers Open
View article: Modified cure cycles for increased fatigue performance of fiber metal laminates
Modified cure cycles for increased fatigue performance of fiber metal laminates Open
View article: Energy Absorption Properties of 3D-Printed Polymeric Gyroid Structures for an Aircraft Wing Leading Edge
Energy Absorption Properties of 3D-Printed Polymeric Gyroid Structures for an Aircraft Wing Leading Edge Open
Laminar flow offers significant potential for increasing the energy efficiency of future transport aircraft. At the Cluster of Excellence SE2A—Sustainable and Energy-Efficient Aviation—the laminarization of the wing by means of hybrid lami…
View article: Comparison of different cross-sectional approaches for the structural design and optimization of composite wind turbine blades based on beam models
Comparison of different cross-sectional approaches for the structural design and optimization of composite wind turbine blades based on beam models Open
During the preliminary design phase of wind turbine blades, the evaluation of many design candidates in a short period of time plays an important role. Computationally efficient methods for the structural analysis that correctly predict st…
View article: Increased accuracy of service life prediction for fiber metal laminates by consideration of the manufacturing-induced residual stress state
Increased accuracy of service life prediction for fiber metal laminates by consideration of the manufacturing-induced residual stress state Open
Fiber metal laminates (FML) combine the high specific properties of fiber-reinforced polymers with the ductility and damage tolerance of metals. However, during the manufacturing process of FMLs, in-plane residual stresses arise in the sin…
View article: Reducing Artefacts in FRF-based Damage Detection Using Novel Mode Extraction Approach for Guided Ultrasonic Waves
Reducing Artefacts in FRF-based Damage Detection Using Novel Mode Extraction Approach for Guided Ultrasonic Waves Open
Damage in thin-walled structures can be detected by guided ultrasonic wave (GUW) based structural health monitoring systems. The application of phased arrays enables the scanning of large-scale structures from a single position. However, p…
View article: Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperature
Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperature Open
Hybrdization of CFRP with steel sheets enhances bolt-bearing performance. At room temperature, bearing strength is reported to increase while minimum edge and width distances decrease. To assess if this advantage persists under low tempera…
View article: Effect of low temperature on interlaminar fracture toughness of multi-directional CFRP and CFRP-steel interfaces
Effect of low temperature on interlaminar fracture toughness of multi-directional CFRP and CFRP-steel interfaces Open
Delamination is the dominant failure type in FMLs, particularly when combining CFRP and steel. Practical applications usually contain multi-directional interfaces. Therefore, delamination of multi-material and multi-directional interfaces …
View article: Surface Toughening - Functionality and testing of a stress reducing technology of bonded joints using DCB and ENF specimen made of 8552/IM7 carbon composite and PVDF bonded with EA9695 film adhesive
Surface Toughening - Functionality and testing of a stress reducing technology of bonded joints using DCB and ENF specimen made of 8552/IM7 carbon composite and PVDF bonded with EA9695 film adhesive Open
Structural bonding has clear advantages over riveting or bolting, such as weight savings, corrosion and load transfer over a wide area. However, even with bonded joints, stress concentrations occur near the edges, which can lead to crack g…
View article: Lightworks, a scientific research framework for the design of stiffened composite-panel structures using gradient-based optimization
Lightworks, a scientific research framework for the design of stiffened composite-panel structures using gradient-based optimization Open
Efficient structural optimization remains integral in advancing lightweight structures, particularly concerning the mitigation of environmental impact in air transportation systems. Varying levels of detail prove useful for different appli…
View article: Design methodology for optimal sensor placement for cure monitoring and load detection of sensor-integrated, gentelligent composite parts
Design methodology for optimal sensor placement for cure monitoring and load detection of sensor-integrated, gentelligent composite parts Open
Selecting right positions for composite-integrated sensors for monitoring cure during manufacturing and loads during product use presents challenges for engineering design. Since an optimal sensor placement (OSP) methodology for both phase…
View article: Structural and Aerodynamic Characteristics of Micro-Perforated Porous Sheets for Laminar Flow Control
Structural and Aerodynamic Characteristics of Micro-Perforated Porous Sheets for Laminar Flow Control Open
Laminar flow control shows an unparalleled potential to increase the energy efficiency of state-of-the-art transport aircraft. However, active boundary layer suction requires micro-metre precision and is associated with extensive manufactu…
View article: Adaptive-Stiffness Characteristics of Pneumatic Rotary Actuators for Folding Wingtips
Adaptive-Stiffness Characteristics of Pneumatic Rotary Actuators for Folding Wingtips Open
Folding wingtips address the challenges of high aspect ratio wings, such as airport conformity, increased wing root bending moment, and reduced aircraft maneuverability. The functionalities of free-flapping folding wingtips can be extended…
View article: Publisher’s Note: “Photothermal defect imaging in hybrid fiber metal laminates using the virtual wave concept” [J. Appl. Phys. 135, 074903 (2024)]
Publisher’s Note: “Photothermal defect imaging in hybrid fiber metal laminates using the virtual wave concept” [J. Appl. Phys. 135, 074903 (2024)] Open
View article: Photothermal defect imaging in hybrid fiber metal laminates using the virtual wave concept
Photothermal defect imaging in hybrid fiber metal laminates using the virtual wave concept Open
This study presents photothermal imaging results of subsurface material defects within fiber metal laminates utilizing the virtual wave concept. Therefore, we theoretically analyze the propagation of the virtual wave signal in a hybrid com…
View article: Mechanical testing of threaded inserts for additively manufactured sandwich panels with Gyroid core structures
Mechanical testing of threaded inserts for additively manufactured sandwich panels with Gyroid core structures Open
View article: Natural laminar flow leading edge: Requirements, design, and experimental validation under operational loads
Natural laminar flow leading edge: Requirements, design, and experimental validation under operational loads Open
To unlock the potential of natural laminar flow aircraft wings, novel structural designs are necessary for the wing leading edge and its attachment. Those designs may not impinge on operability and maintenance of the aircraft. This paper p…
View article: Simulation of SMPs for the Bonding Process of a Gyroid-Core with a CFRP Aerodynamic Profile
Simulation of SMPs for the Bonding Process of a Gyroid-Core with a CFRP Aerodynamic Profile Open
View article: eXplainable artificial intelligence for automatic defect detection in additively manufactured parts using CT scan analysis
eXplainable artificial intelligence for automatic defect detection in additively manufactured parts using CT scan analysis Open
Additive Manufacturing (AM) and in particular has gained significant attention due to its capability to produce complex geometries using various materials, resulting in cost and mass reduction per part. However, metal AM parts often contai…