Yuchen Guo

Beijing Institute of Technology

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Gaoyang Hu

Huazhong University of Science and Technology

Bo Zhou

Hefei General Machinery Research Institute (China)

Kezhen Lv

China Academy of Engineering Physics

Pengwan Chen

Beijing Institute of Technology

Chao Han

Nanjing Medical University

Jing Shi

Xidian University

Huiqing Fan

Northwestern Polytechnical University

Huabin Wang

Yunnan Normal University

Jing Wang

ETH Zurich

Changbai Long

Xi'an Jiaotong University

Cooperative Institutions

Northwestern Polytechnical University

ETH Zurich

Swiss Federal Laboratories for Materials Science and Technology

Beijing Institute of Technology

Huazhong University of Science and Technology

Xidian University

China XD Group (China)

Xi'an Jiaotong University

Northeastern University

China Academy of Engineering Physics

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Effect of Binder Coatings on the Fracture Behavior of Polymer–Crystal Composite Particles Using the Discrete Element Method

Coatings (2021)

Huabin Wang Jianmei Li Gaoyang Hu Bo Zhou Yuchen Guo

Polymer–crystal composite particles formed by crystals coated with binders are widely used in the fields of medicine, energy, the chemical industry, and civil engineering. Binder content is an important factor in determining the mechanical behavior of composite particles. Therefore, this study aimed to investigate the underlying effect of binder coatings in the fracture micromechanics of polymer–crystal composite particles using the discrete element method (DEM). To achieve this objective, realistic particle and crystal shapes were first obtained and reconstructed based on X-ray micro-computed tomography (μCT) scanning and scanning electron microscope (SEM) images. A series of single particle crushing tests and DEM simulations were conducted on real and reconstructed polymer–crystal composite particles, respectively. Based on the experimental and DEM results, the effect of binder coatings on the crushing strength and crushing patterns of polymer–crystal composite particles was measured. Moreover, the micromechanics of the development and distribution of microcracks was further investigated to reveal the mechanism by which binder coatings affect polymer–crystal composite particles.

Micromechanics

Particle (ecology)

Crystal (programming language)

10.3390/coatings11091075

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Citations (5)

PET/TPU nanofiber composite filters with high interfacial adhesion strength based on one-step co-electrospinning

Powder Technology (2021)

Yinghe Guo Yuchen Guo Weidong He Yibo Zhao Ruiqing Shen

Nanofiber membranes are widely employed to prepare composite filter media. The traditional composite method of hot pressing may damage the structure of nanofiber membrane, and thus increase the pressure drop through the composite filter. In this study, three-dimensional PET/TPU (polyethylene terephthalate/thermoplastic polyurethane) composite nanofiber filters (PET/TPU-CNF) with beads-on-string structure were fabricated by one-step co-electrospinning. Besides a stronger adhesion strength of 1.385 N/cm between the nanofiber membrane and substrate, the PET/TPU-CNF presented a low pressure drop of 28.96 Pa and a filtration efficiency of 83.64% for ambient particles at a face velocity of 5.3 cm/s. A high tensile strength of 4.33 MPa was measured for the PET/TPU nanofiber membrane. Thanks to the beads-on-string structure, both the mechanical properties and filtration performances of PET/TPU-CNF were enhanced compared with the pure PET nanofiber composite filter. The present study provides a new route to improve the membrane adhesion strength of nanofiber membrane coated filters.

Electrospinning

Thermoplastic polyurethane

Filtration (mathematics)

10.1016/j.powtec.2021.04.020

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Citations (34)

Origin of the large strain response in tenary SrTi0.8Zr0.2O3 modified Bi0.5Na0.5TiO3–Bi0.5K0.5TiO3 lead-free piezoceramics

Journal of Materials Science (2014)

Yuchen Guo Huiqing Fan Jing Shi

Hysteresis

10.1007/s10853-014-8599-z

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Citations (38)

Discrete element modeling of the compression molding of polymer–crystal composite particles

Powder Technology (2021)

Gaoyang Hu Bo Zhou Ru Fu Yuchen Guo Chao Han

Micromechanics

Compression molding

Molding (decorative)

Particle (ecology)

Crystal (programming language)

10.1016/j.powtec.2021.05.077

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Citations (21)

Compressibility and meso-mechanical behavior of polymer bonded explosives with different crystal qualities during pressing process

Composite Structures (2024)

Yuchen Guo Pengwan Chen RuiLiu ZhijianYang Feng Zhang

Crystal (programming language)

10.1016/j.compstruct.2024.118784

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Citations (0)

Electromechanical and electrical properties of Bi0.5Na0.5Ti1−xMnxO3−δ ceramics with high remnant polarization

Journal of Alloys and Compounds (2014)

Yuchen Guo Huiqing Fan Changbai Long Jing Shi Lu Yang

Rietveld Refinement

10.1016/j.jallcom.2014.04.038

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Citations (62)

Microstructural characterization of pressure-induced cracking in melamine/F2311 composites and crack-healing behavior via thermal-pressure aging treatment

Materials & Design (2020)

Yuchen Guo Lan Qiong Chao Han Pengwan Chen Rui Liu

The effects of F2311 content on the crack morphology and crack healing behavior of melamine/F2311 composites, a safe polymer-bonded explosive analog, were systematically studied in terms of its microstructure and mechanical properties. Scanning electron microscopy and CT analysis were used to quantitatively characterize the microcrack zone. The results demonstrated that thermal-pressure aging treatment could eliminate cracks and further improve the density and mechanical properties. The density and mechanical properties of the M-10F samples improved by the largest margin, its density increased by 1.9% and its tensile and compressive strength increased by >100%. The improvement of the density and mechanical properties were related to the processing parameters, the initial density, and the binder content. The thermal energy and compressive stress provided to the system during thermal-pressure aging treatment can promote the binder migration at the interface. In addition, small melamine particles that are prone to displacement and rotation may migrate with F2311 to fill cracks. These processes could collectively reduce damage and defects, partially or completely heal cracks, and restore the structure and properties of the material. Crack healing under pressure and temperature indicates that thermal-pressure aging treatment has high potential for damage repair of composites with a thermoplastic binder.

Characterization

10.1016/j.matdes.2020.108538

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Citations (13)

Mechanical behavior of PBX with different HMX crystal size during die pressing: Experimental study and DEM simulation

Composites Science and Technology (2022)

Yuchen Guo Rui Liu Pengwan Chen Bo Zhou Gaoyang Hu

Breakage

Crystal (programming language)

Hot pressing

Particle (ecology)

10.1016/j.compscitech.2022.109378

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Citations (19)