Optimization and compressive behavior of composite 2-D lattice structure

Li, Shuai; Qin, Jiankun; Li, Chenchuang; Feng, Yanxia; Zhao, Xin; Hu, Yingcheng

doi:10.1080/15376494.2018.1504361

Cited by 22 publications

(13 citation statements)

References 23 publications

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“…With the increasing depletion of petroleum resources, the development and utilization of new environment-friendly structural and functional materials has become imperative [1,2,3,4]. Nowadays, the environmental protection materials are advocated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot-Alkali Treatment on the Structure Composition of Jute Fabrics and Mechanical Properties of Laminated Composites

et al. 2019

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In this study, jute fabrics/epoxy-laminated composites were fabricated via a simple and effective manual layering. Hot-alkali treatment was used to pretreat jute fabrics to improve their interfacial compatibility. The effects of hot-alkali treatment with five concentrations (2%, 4%, 6%, 8% and 10%) on the composition, crystallinity and surface morphology of jute fibers, were analyzed with the aids of Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and the scanning electron microscope (SEM). The mechanical properties (tensile and flexural) of laminated composites, and the morphology of the tensile fracture surface, were analyzed. The results indicated that the crystallinity index (CI) and crystallite size (CS) of the cellulose in jute fibers were improved, and there were three stages for CI and CS with the increase of alkali concentrations. Hot-alkali treatment improved the mechanical properties of laminated composites, especially for the 6% NaOH-treated jute fabric reinforced. The tensile strength, flexural strength, tensile modulus and flexural modulus of 6% NaOH-treated fabrics reinforced composites were enhanced by 37.5%, 72.3%, 23.2% and 72.2%, respectively, as compared with those of untreated fabrics reinforced composites. The fiber pull-out and the gaps of the tensile fracture surface were reduced after hot-alkali treatment.

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Section: Introductionmentioning

confidence: 99%

Effect of Hot-Alkali Treatment on the Structure Composition of Jute Fabrics and Mechanical Properties of Laminated Composites

et al. 2019

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“…The specific strength refers to the strength of a unit mass per unit volume, so its value is equal to the ratio of the strength to the density. It is an indicator to measure if the material is light and strong [25]. When the 2-D lattice structure is subjected to flatwise compressive load, the specific strength trueσ¯ss of the 2-D lattice structure with variable cross-section core is given by:trueσ¯ss=(X3sinω+X1+X2lcosω)∆normalhρpr∫0lsans-serifπ(normalk|normalx−l2|n+normalr)2dx, where ρ pr = 1.16 g∙cm −3 , is the density of photosensitive resin.…”

Section: Analytical Modelmentioning

confidence: 99%

Design and Compressive Behavior of a Photosensitive Resin-Based 2-D Lattice Structure with Variable Cross-Section Core

Qin

Wang

et al. 2019

Polymers

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This paper designed and manufactured photosensitive resin-based 2-D lattice structures with different types of variable cross-section cores by stereolithography 3D printing technology (SLA 3DP). An analytical model was employed to predict the structural compressive response and failure types. A theoretical calculation was performed to obtain the most efficient material utilization of the 2-D lattice core. A flatwise compressive experiment was performed to verify the theoretical conclusions. A comparison of theoretical and experimental results showed good agreement for structural compressive response. Results from the analytical model and experiments showed that when the 2-D lattice core was designed so that R/r = 1.167 (R and r represent the core radius at the ends and in the middle), the material utilization of the 2-D lattice core improved by 13.227%, 19.068%, and 22.143% when n = 1, n = 2, and n = 3 (n represents the highest power of the core cross-section function).

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“…Cellulose can be obtained from several natural sources, such as cotton, sugarcane and wood. It is the most abundant biodegradable polymer material found on the Earth [1,2,3,4,5,6]. The chemical structure of cellulose is formed by D-glucose units that are connected by β-1,4-glycosidic linkages.…”

Section: Introductionmentioning

confidence: 99%

Reinforcing Linear Low-Density Polyethylene with Surfactant-Treated Microfibrillated Cellulose

2019

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Due to its excellent mechanical properties and reinforcement abilities, cellulose has become a promising candidate for developing nanocomposites. However, cellulose agglomeration is an issue that must be solved. In this study, we treated microfibrillated cellulose (MFC) with a mixture of the non-ionic surfactants Span80 and Tween80 (ratio of 1:1) in order to prevent the intermolecular hydrogen bond aggregation of MFC during the process of MFC drying. We used a conical twin-screw extruder to melt compounds for the surfactant-treated MFC and powdered LLDPE. Furthermore, the extruded mixture was hot-pressed into a film, and we also tested the properties of the composite film. We can conclude that there was no agglomeration in the composite film according to microscopic observations and light transmittance test results. Furthermore, the dispersion of the surfactant-treated MFC (STMFC) was uniform until the STMFC filler increased to 10 wt%. The mechanical test results show that when the content of STMFC filler was 10 wt%, the mechanical properties of the composite were optimal. Compared to LLDPE, the STMFC/LLDPE composite film had an increase of 41.03% in tensile strength and an increase of 106.35% in Young’s modulus. Under this system, the DSC results show that the melting point of LLDPE increased from 125 to 131 °C. X-ray diffraction (XRD) results showed that the addition of STMFC did not change the crystallinity of the STMFC/LDPE composites, although the crystallite size increased.

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Optimization and compressive behavior of composite 2-D lattice structure

Cited by 22 publications

References 23 publications

Effect of Hot-Alkali Treatment on the Structure Composition of Jute Fabrics and Mechanical Properties of Laminated Composites

Effect of Hot-Alkali Treatment on the Structure Composition of Jute Fabrics and Mechanical Properties of Laminated Composites

Design and Compressive Behavior of a Photosensitive Resin-Based 2-D Lattice Structure with Variable Cross-Section Core

Reinforcing Linear Low-Density Polyethylene with Surfactant-Treated Microfibrillated Cellulose

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