Kui Wang

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Verified

Kui verified their affiliation via an institutional email.

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• PhD in Mechanics
• Professor (Full) at Central South University

The recycling of resources is an important measure to achieve circular economy and sustainable development. In this paper, a sustainable filled structure was proposed and realized by combining recycled empty beverage cans with eco-friendly multi-cell fillers. Quasi-static axial compressions were carried out to characterize the energy absorption per...

Building lighter but stronger has been a major industrial concern in recent decades. To achieve its goals, Altuglas International, a subsidiary of the Arkema group, has developed several types of nanostructured acrylic glass materials, that are lighter and more resistant than glass PMMA. Combining PMMA (polymethyl methacrylate) and a nanostructured...

The present work aimed to study the printability and tensile behaviors of ramie yarn-reinforced PLA-based composites fabricated by an in situ impregnated fused filament fabrication (FFF) process. The dimensional error analysis was conducted to evaluate the printability of biocomposites with different processing variations and continuous ramie yarns...

The increase in vehicle ownership has resulted in higher energy consumption and increased environmental pollution. To address this issue, there is a growing focus on lightweight materials in vehicle design. Thin-walled structures, constructed from basalt fiber-reinforced polymer (BFRP), exhibit significant potential for use as energy absorbers due...

Digital light processing (DLP) 3D printing technology has shown promising applications due to its capability of rapidly fabricating intricate structures with high resolution. However, achieving DLP printed parts with high print quality and robust mechanical properties remains a challenge. This study investigated the effects of crucial printing para...

Material anisotropy caused by crystal orientation is an essential factor affecting the mechanical and fracture properties of crystal materials. This paper proposes an improved ordinary state-based peridynamic (OSB-PD) model to study the effect of arbitrary crystal orientation on the granular fracture in cubic crystals. Based on the periodicity of t...

The increasing number of train–moose collision accidents threatens train running safety. This study investigated the bullet train–moose collision process and explored the effect of parameters on the dynamic responses. The multibody (MB) model was developed and validated against real–world collisions and the validated finite element model. A paramet...

Continuous fiber reinforced composites are widely used in thin‐walled structures due to their high specific strength and stiffness. In this work, continuous natural fiber was introduced into thin‐walled biocomposite structures via 3D printing technique to enhance energy absorbing properties and promote ecological compatibility. The effects of varyi...

This work reported a novel two-stage in-situ impregnation method for additively manufacturing dry fiber bundles reinforced polymer composites using a commercial dual-nozzle 3D printer. This process allowed simultaneous manufacturing of both continuous fiber prepreg filaments and continuous fiber reinforced polymer composites (CFRPCs). Initially, it...

The widespread adoption of aluminum alloy electric buses, known for their energy efficiency and eco-friendliness, faces a challenge due to the aluminum frame’s susceptibility to deformation compared to steel. This issue is further exacerbated by the stringent requirements imposed by the flammability and explosiveness of batteries, necessitating rob...

Objective Occupant impact safety is critical for train development. This paper proposes a systematic procedure for developing validated numerical occupant crash scenarios for high-speed trains by integrating experimental, computational, and inverse methods. Methods As the train interior is the most potentially injury-causing factor, the material p...

Fused filament fabrication (FFF) as an additive manufacturing process, is a thermal driven method used to produce continuous fiber reinforced composites for engineering applications. Interlayer delamination is a significant concern for composites manufactured by FFF process. To address the problem of interlayer delamination and enhance the macro-me...

The present work aimed to examine the tensile and flexural behaviors of biocomposites reinforced with continuous plant fibers, utilizing a range of polylactic acid (PLA) matrix materials and varying fiber content. These biocomposites were fabricated using an in situ-impregnated fused filament fabrication (FFF) technique. The study incorporated thre...

Remote photoplethysmography (rPPG) technology is a non-contact physiological signal measurement method, characterized by non-invasiveness and ease of use. It has broad application potential in medical health, human factors engineering, and other fields. However, current rPPG technology is highly susceptible to variations in lighting conditions, hea...

3D printing continuous fiber reinforced composite (CFRC) has the advantages of manufacturing complex shapes and short production cycles. Due to the anisotropic mechanical properties of continuous fibers, the printing path of the fibers determines the properties of the printed CFRCs. In this paper, a series of novel cellular crossing paths were prop...

In the in situ tensile tests of polymer-GNP nanocomposites, the damage initiation in the interfacial zone is directly related to the surface adhesion in the interface. Adding functional groups to GNP increases the adhesion between polymer and inclusion and significantly reduces damage in the interfacial zone. This research was developed based on hi...

To protect high-speed trains in derailments, reinforced concrete (RC) derailment containment walls are often built beside the track. The resulting problem is that derailed trains hit the surrounding RC derailment containment wall. This paper aims to investigate high-speed train post-derailment impact responses and evaluate the crashworthiness and c...

Moose-vehicle collisions often cause broken glass, deformed roofs, and dented hoods, which makes the driving space invaded to a large extent and seriously threatens the life safety of occupants, and is an essential factor threatening traffic safety. However, there is currently a lack of moose numerical models that can be used to study moose-vehicle...

Through evolutionary processes, helicoidal structures have been proven to exhibit exceptional load‐carrying capacity and impact resistance performance. To date, extensive experimental and numerical studies have been carried out on their impact behaviors, while few relevant analytical studies have been reported even though it is urgently needed for...

Experimental and simulation studies of the response of bonded‐repaired and scarf‐repaired carbon fiber‐reinforced polymer laminates under the low‐velocity impact (LVI) were carried out. The center‐ and eccentric‐repaired laminates were prepared for experiments. The experimental results verify the validity of the finite element model in terms of the...

In this study, a novel modular multicell structure was proposed to achieve tunable energy absorption characteristics. Dovetail grooves and protrusions were designed on square thin-walled tubes as interfaces to realize the modular assembly. The quasi-static compression experimental results showed that single thin-walled tubes made of thermoplastic p...

The fiber-filled polymer composite is one of the best materials which provides a symmetrical superior strength and stiffness to structures. With the strengthening of people’s environmental protection and resource reuse consciousness, the development of renewable materials, especially natural fiber-filled polymer composites, is receiving great atten...

Fracture toughness is a critical parameter in the evaluation of a component's structural integrity and damage tolerance. For 3D‐printed continuous fiber reinforced composites (CFRCs) based on the fused deposition modeling (FDM) technique, the fracture behavior differed from that of composites manufactured by traditional processes due to the presenc...

The main goal of this study was to investigate the effect of heat treatment on the microstructural and interlayer mechanical properties of 3D printed continuous carbon fiber‐reinforced composites (CCFRCs). The influence of raster orientations on the interlayer properties of composites was systematically studied by the floating roller peel test. The...

The application of continuous natural fibers as reinforcement in composite thin-walled structures offers a feasible approach to achieve light weight and high strength while remaining environmentally friendly. In addition, additive manufacturing technology provides a favorable process foundation for its realization. In this study, the printability a...

With the growing prominence of environmental conservation awareness, there has been a notable surge in the exploration of renewable materials, particularly in the realm of natural fiber reinforced polymer composites. This heightened focus is underscored by the recent advancements in additive manufacturing techniques dedicated to continuous natural...

To study the perforation performance of CFRP laminates for rail vehicles under high-velocity impact from foreign objects, impact tests on CFRP laminates at a velocity of 163 m/s were carried out, and a corresponding finite element model was established using ABAQUS and verified. The user-defined material subroutine combined the material strain rate...

Continuous fiber reinforced polymer composites are widely used in load-bearing components and energy absorbers owing to their high specific strength and high specific modulus. The path planning of continuous fiber is closely related to its structural defects and mechanical properties. In this work, continuous fiber reinforced polymer honeycomb stru...

Hydromorph Biocomposites (HBCs) are self‐shaping materials whose motions are actuated by moisture‐induced swelling of natural fibers and designed through a multilayered bioinspired material architecture. Their reactivity, i.e., kinetic of actuation, is relatively slow and is currently limited by the moisture transport. Porosities are commonly assum...

This paper offered a novel approach for self-monitoring manufacturing damage in 3D printed continuous carbon fiber reinforced composites (CFRCs). The proposed method utilized the Kelvin Four-terminal sensing technique to measure the electrical resistance of continuous carbon fiber bundles within the composites. By employing this measurement approac...

In recent years, innovations in 3D/4D printing techniques for continuous fiber-reinforced polymer composites (CFRPCs) have opened new perspectives for the integrated design and manufacture of composites with customized functions. This paper reviews the current state of 3D/4D printed functional composites, including the materials, shape memory/chang...

The mechanical performance of polymer-based materials is related to structural features that do not allow materials to efficiently accommodate the macroscopic strain to which they are exposed. In the case of neat polymers, these features are linked to their molecular structure and microstructure. Concerning polymer-based composites, the interfacial...

With the development of the economy, urban road transportation has been continuously improved, and the number of motor vehicles has also increased significantly, leading to serious energy consumption issues. As critical nodes in the urban road transportation network, intersections have become a focal point of research on vehicle energy consumption....

The desirable properties of natural porous materials have inspired humans to design cellular materials with remarkable properties such as high energy absorption, acoustic and thermal insulation, and high specific strength structures. Triply Periodic Minimal Surface (TPMS) structures are particularly important among the architected materials. In thi...

In this paper, a novel 3D printed continuous ramie fiber reinforced variable stiffness biocomposite honeycomb cellular structure (CF-VSHS) was reported. Based on the printing path planning of CF-VSHSs, variable stiffness (VS) cellular structures filled with cells of various dimensions were prepared by employing a detachable and recyclable support-a...

This work aimed to investigate the compressive and shape recovery performance of the 3D printed shape-memory corrugated tubes (SMCTs). The structures were manufactured by fused deposition modeling technique and made from the shape memory polymer. The effects of corrugation number and amplitude on crushing and shape recovery behaviors were studied b...

Collisions between trains and moose that cross a track are common occurrences according to rail accident statistics. A moose lying on a track after a crash may increase the risk of train derailment. In addition, a moose thrown into the air during a collision may also hit and damage the pantograph, which prevents a train from running. This paper dev...

The 3D printed composite material selection is of great interest due to its extensive application prospect and can be considered as a challenging multiple-criteria decision making (MCDM) issue. The hesitation and uncertainty of experts are difficult to measure, and the high degree of interaction among criteria is often overlooked in the decision pr...

Bio-inspired cellular structures provide excellent elements and design concepts for designing thin-walled energy-absorbing structures of vehicles, trains and aircrafts, due to their special structural characteristics and excellent mechanical properties. This study conducts a literature review of bio-inspired cellular energy-absorbing structures wit...

Load‐bearing biological staggered composites, like nacre, teeth, and bone, possess an exceptional combination of material properties like high stiffness and high toughness. To date, most of the analytical research are for nacre‐like bio‐inspired staggered composites, with highly overlapped platelets. But the collagen fibril‐like staggered composite...

The mechanical properties of hybrid continuous carbon and Kevlar fibers reinforced polyamide (PA)‐based composites manufactured by the fused deposition modeling (FDM) technique were investigated in this paper. The effects of fiber raster orientations, fiber layer locations, and stacking sequences were studied by the quasi‐static indentation (QSI) t...

This work aimed at investigating the effects of recycling on the mechanical properties of recycled polypropylene (PP)‐based composites and improving the mechanical properties of recycled materials by adjusting the remanufacturing temperature. In this study, 3D printing was selected as the remanufacturing approach and the composites were ground and...

In this work, a shape-memory thin-walled circular structure was proposed. The structure was processed based on the 3D printing technique of fused deposition modeling. The shape memory thermoplastic polyurethane was used as the shape-memory material. After the progressive collapse during the quasi-static compression (2 mm/min), it was observed that...

The large scale and long calculation times are unavoidable problems in modeling honeycomb structures with large sizes and dense cells. The cell magnification equivalent is the main method to solve those problems. This study finds that honeycomb structures with the same thickness-to-length ratios have the same mechanical properties and energy absorp...

The selection of 3D printed composite materials considering multiple criteria has become a challenging issue for designers/engineers and can be regarded as a typical decision-making problem. Especially for diverse engineering applications, the different strain rates encountered need to be addressed in the decision-making process. In this study, a s...

This work reported a novel dual-nozzle 3D printing method for continuous fiber reinforced composite cellular structures (CFRSs). The dual-nozzle modules and corresponded printing paths were proposed to realize the CFRSs by theoretically increasing two times manufacturing speed. Based on this novel dual-nozzle 3D printing method, typical rhombus fil...

Fiber-reinforced composites are widely used in energy absorbers structures due to their high specific strength and specific modulus. However, composite materials are sensitive to loading rate and temperature conditions. In this paper, multi-cell hexagonal tubes (MHT) were prepared using fused deposition modeling by carbon-fiber-reinforced polyamide...

Fused deposition modeling (FDM) is a promising additive manufacturing technique for fabrication of continuous fiber-reinforced thermoplastic composites. For composite applications, the balance of material properties, including rigidity and toughness, needs to be considered. To overcome the drawbacks induced by single continuous fiber reinforcement,...

The present work aimed to study the quasi-static compression behaviors of 3D printed continuous ramie fiber reinforced biocomposite corrugated structures (CFCSs) with excellent shape memory effects. The in-plane compression test was conducted to evaluate the effects of cell shapes, fiber volume fraction (f v) and addition of fiber on the compressio...

This paper investigated the effects of heat‐treatment and loading directions on compressive properties of 3D printed continuous carbon fiber reinforced composites (CCFRC). After heat‐treatment at different conditions, specimens with different stacking sequences were compressed under different loading directions. The effect of heat‐treatment on the...

Continuous fiber reinforced composite lightweight structures (CFRSs) are widely applied to aerospace, automobile, marine and other fields due to their high specific strength and modulus, low density and fatigue resistance. Innovations in the additive manufacturing technique of continuous fiber reinforced composites (CFRC) opened new perspectives fo...

The present work aimed to study the penetration behaviors of 3D printed continuous ramie yarn reinforced polylactic acid (PLA) based woven-like and non-woven-like biocomposites. The architectures were produced by in-situ impregnated 3D printing process according to a novel interweaved and a conventional printing path (unidirectional and orthogonal)...

In this study, a high-strength carbon fiber reinforced composite laminate for rail vehicles was machined as a perforated sample and repaired with a patch of the same material. The response of the repaired laminate to a low-velocity impact with an energy of 30 J was investigated through experiments and simulations. The finite element simulation mode...

3D printed thin-walled composite structures suffered from the inherent low interlayer bonding, which limited the mechanical properties and influenced compressive behaviors. This work focused on effects of the postprocess on interfacial properties and compressive behaviors of thin-walled composite structures made by fused deposition modeling. To imp...

3D-printing of biocomposites using continuous natural fiber composites is emerging as a relevant manufacturing method to develop highly tailorable materials. These are materials with high performance characteristics, whose capabilities have been achieved through the controlled design of the mesostructure via the 3D printing process. However, the de...

The structural optimal design, as an effective way to improve the crashing performance of energy-absorbing structures (EASs), still faces some challenges, e.g., multiple conflicting objectives and the non-uniqueness of Pareto solutions. To address these problems, this study proposes a hybrid optimization approach that combines the theories of multi...

Lattice structures with high mechanical properties and lightweight performance attracted increasing attention to the application of automotive, railway vehicle, and aerospace industries. This work developed a novel three-dimensional concave lattice structure using a hyper-elastic soft photopolymer via the digital light processing technique. The axi...

3D printing using continuous fiber reinforcement provides a new technical method for preparing complex components with high mechanical behaviors. However, these printed composites have great differences in interfacial behaviors, affecting overall performance. This study aimed to investigate the tensile behaviors of 3D printed continuous fiber fille...

3D-printed continuous ramie fiber reinforced polypropylene composites (CRFRPP) are expected to ensure good mechanical properties while meeting the requirements of environmental friendliness and sustainability. To promote the wide industrial application of CRFRPP, this work investigated the effects of printing parameters (extrusion flow rate, printi...

The synthetic fiber reinforced composite materials manufactured by conventional manufacturing processes are gradually unable to meet the requirements of low-cost, rapid manufacturing and environmental friendliness. Therefore, continuous ramie fiber-reinforced polylactic acid (PLA)-based biomass composite with different layup are manufactured by in-...

The main novelty of this paper is the use of poly-ethylene terephthalate glycol (PETG) as a new shape memory polymer with excellent shape memory effect (SME) and printability. In addition, for the first time, the effect of programming temperature on PETG 4D printed samples has been studied. The amorphous nature of the PETG necessitates that molecul...

3D printing technologies are widely used in aerospace, automobile, and other fields due to their rapid manufacture of strong and lightweight products without additional molds and components. However, the relatively low mechanical behaviors of 3D printed composites were due to the weak pristine matrix and the inherent porosity of the fused depositio...

3D‐printed continuous natural fiber reinforced biocomposites have promising prospects due to their environmental friendliness and suitable mechanical properties. Understanding the dynamic mechanical properties of 3D‐printed biocomposites is essential to expand their application. In this study, the continuous ramie fiber reinforced biocomposites (CR...

This paper investigated the effects of printing directions (path of nozzle movement) and strain rates on the performances of short carbon and glass fibers filled polyamide‐based composites prepared by fused deposition modeling (FDM). Cylindrical specimens printed in three different printing directions were compressed at a wide range of strain rate....

This study aimed at applying machine learning (ML) methods to analyze dynamic strength of 3D-printed polypropylene (PP)-based composites. The dynamic strength of additive manufactured PP-based composites with different fillers and printing parameters was investigated by split Hopkinson pressure bars. Based on experimental results, six machine learn...

El diseño bioinspirado se desarrolla conscientemente a través de la investigación, el estudio y el análisis de como los organismos vivos han desarrollado soluciones, superado los retos del mundo natural. De este modo, el campo de los materiales bioinspirados contribuye al diseño de estructuras y a la fabricación de materiales, con el objetivo de co...

Continuous fiber reinforced polymers composites have significant potential due to their high specific strength and high specific modulus. But there are some limitations on manufacturing and maintenance for the composites using existing manufacturing technologies. Meanwhile, the increasingly advanced 3D printing technology, with advantages on comple...