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Author

Tang Ting

Bio: Tang Ting is an academic researcher from Chongqing University of Technology. The author has contributed to research in topics: Glass fiber & Surface layer. The author has an hindex of 1, co-authored 2 publications receiving 1 citations.

Papers
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Patent
30 Jul 2019
TL;DR: In this paper, a foam core phase change sandwich structure composite material and a preparation method thereof are presented. But the composite material comprises an upper/lower surface layer, a foam interlayer, a core layer and reinforcing ribs.
Abstract: The invention provides a foam core phase change sandwich structure composite material and a preparation method thereof. The composite material comprises an upper/lower surface layer, a foam core layerand reinforcing ribs; the upper/lower surface layer and the reinforcing ribs are made from glass fiber reinforced polyurethane composite materials; the foam core layer is made from polyurethane hardness and micro-capsule carried phase change energy storage materials; the upper/lower surface layer, the foam core layer and the reinforcing ribs are subjected to hot-pressing molding to obtain the sandwich composite material, curing and foaming are completed under the same technological condition, the interlayer shear strength of the surface layer and the core layer is improved, and the problem ofinterlayer cracking is avoided. The reinforcing rib structure is introduced into the foam core layer, the whole mechanical strength and rigidity of the sandwich composite material are improved, the impact resistance is greatly enhanced, particularly, the strength of the foam interlayer and the modulus ratio surface layer strength are high, the brittleness and other problems are avoided, the temperature regulating and control functions are achieved, the material functionality is effectively improved on the basis of the light and high strength performance, and light weight and functions of thematerial are achieved.

Cited by
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Journal ArticleDOI
TL;DR: In this paper , a 3D Kevlar/polyimide composite (K/PIC) was constructed by mimicking the structural features of the beetle's elytra, which has a void content of 84% and a low volume density of 0.23 g/cm3.
Abstract: Lightweight, high strength, and flame-retardant properties are highly required for practical applications of composites, such as in areas of aerospace, aircraft, and automobiles. However, it is challenging to achieve the above properties simultaneously due to the intrinsic conflict between lightweight and excellent mechanical performance. Herein, we overcome this conflict in a 3D Kevlar/polyimide composite (K/PIC) innovatively by mimicking the structural features of the beetle's elytra. As a result, the K/PIC has a void content of 84% and a low volume density of 0.23 g/cm3, but it can support more than 16 000 times its own weight without any damage. It exhibits a specific strength of 23.5 MPa/g·cm−3, which is superior to that of many other reported lightweight composites. Additionally, the as-prepared K/PIC could not be ignited and could retain around 93.2% of its original compressive strength even after being subjected to the flame of an alcohol burner for 300 s. The results demonstrate that similar lightweight, high strength, and flame-retardant composites can be fabricated by this underlying principle in future and be applied in extreme environments, such as aeronautics and aerospace.

12 citations

Journal ArticleDOI
TL;DR: In this article, a 3D Kevlar/polyimide composite (K/PIC) was constructed by mimicking the structural features of the beetle's elytra.
Abstract: Lightweight, high strength, and flame-retardant properties are highly required for practical applications of composites, such as in areas of aerospace, aircraft, and automobiles. However, it is challenging to achieve the above properties simultaneously due to the intrinsic conflict between lightweight and excellent mechanical performance. Herein, we overcome this conflict in a 3D Kevlar/polyimide composite (K/PIC) innovatively by mimicking the structural features of the beetle's elytra. As a result, the K/ PIC has a void content of 84% and a low volume density of 0.23 g/cm3, but it can support more than 16 000 times its own weight without any damage. It exhibits a specific strength of 23.5 MPa/g·cm−3, which is superior to that of many other reported lightweight composites. Additionally, the as-prepared K/PIC could not be ignited and could retain around 93.2% of its original compressive strength even after being subjected to the flame of an alcohol burner for 300 s. The results demonstrate that similar lightweight, high strength, and flame-retardant composites can be fabricated by this underlying principle in future and be applied in extreme environments, such as aeronautics and aerospace.

12 citations

Journal ArticleDOI
TL;DR: In this paper , a cold-pressed bamboo scrimber with varying sanding mesh and density was made and then bonded with polyurethane resins, and the adhesive was concentrated on the surface, assisting the anchoring into the material surface.
Abstract: The adhesive ability of bamboo scrimber is critical for its use in large-scale engineering structures. Cold-pressed bamboo scrimber with varying sanding mesh and density was made and then bonded with polyurethane resin. The adhesive was concentrated on the surface, assisting the anchoring into the material surface. The shear strength and immersion peel strength are studied as parameters to determine the glue qualities. The optimum gluing characteristics were obtained using a 120 grit sandpaper and a density of 1.15 g/cm3. The results indicated that at a density of 1.15 g/cm3, the gluing characteristics rose initially and subsequently dropped as the number of sanding meshes increased. The bonding strength improved with increasing density when 120-mesh sanding was used. With increasing density, the bamboo fiber distribution inside the material got more compact, while the resin dispersion became more uniform. Thus, the surface porosity and roughness were decreased.

1 citations

Journal ArticleDOI
TL;DR: In this article , a hexagonal honeycomb was used to construct a polyurethane cushioning composite with good resilience and compressibility, and the properties of the structure were studied, and its compressive capacity under different compressive strains was analyzed.
Abstract: In order to prepare a cushioning composite with good resilience and compressibility, the 3D fabric was perforated into a hexagonal honeycomb, high elasticity porous polyurethane foam was used as substrate, and the air layer structure was encapsulated with the packaging film. By changing the hexagonal side length and wall thickness of the honeycomb structure, the integral fabric air layer polyurethane buffer composite was prepared. The properties of the structure were studied, and its compressive capacity under different compressive strains was analyzed. The results show that the mechanical properties of polyurethane foam were improved after adding the integral fabric air layer structure. When the composite HPU-R1L2 (polyurethane cushioning composites with 1 cm side length and 2 cm wall thickness of hexagonal honeycomb) was compressed to 75%, its compressive capacity was 8.24 times that of PU (Polyurethane foam with 2.5% bentonite). The prepared composite HPU-R1L1 (Polyurethane cushioning composites with 1 cm side length and 1 cm wall thickness of hexagonal honeycomb) absorbed 96.7% of the energy in the dynamic impact test, indicating that the composite cushioning performance was stronger than that of polyurethane foam. The HPU composites based on the synergistic reinforcement strategy of polyurethane foam and monolithic fabric air-layer structures are an excellent candidate in the field of commodity packaging and personal protection.
Journal ArticleDOI
TL;DR: In this article , the effect of graphene nanoparticles on the strength of a sandwich panel structure based on foam core, which is inspired by the microstructure characteristics of dragonfly wings, has been investigated experimentally and numerically under low-velocity impact.
Abstract: The effect of graphene nanoparticles on the strength of a sandwich panel structure based on foam core, which is inspired by the microstructure characteristics of dragonfly wings, has been investigated experimentally and numerically under low-velocity impact. Sandwich panel structures are made of E-glass/epoxy layers, and different percentages of graphene nanoparticles and combined with their resin. Also, polyurethane foam was used for its central core. For numerical modeling, a nonlinear progressive damage model of composite and nano-composite shells is incorporated into the finite element (FE) code by VUMAT subroutine. The numerical results were compared with the collected experimental data and it shows that there is a good compatibility between them. To check the damage in the structures, the images of the cut view of the samples were taken from the damaged area, and the results were reported. In order to evaluate the distribution of graphene nanoparticles in the polymer structure, the manufactured samples were analyzed using the FE-scanning electron microscopy analysis device. It was concluded that this type of sandwich structure inspired by dragonfly wings can limit damage propagation and keep the rest of the structure healthy under low-velocity impact.