Analysis of the dynamic mechanical property of multiple direction impact protection structure inspired by C60 molecule

2019 ◽  
Vol 233 (17) ◽  
pp. 5919-5932
Author(s):  
Xinhui Shen ◽  
Jinguo Liu ◽  
Pengwei Zhang ◽  
Zhiyu Ni ◽  
Yuwang Liu
Keyword(s):  
Molecular Structure ◽  
Mechanical Properties ◽  
Mechanical Property ◽  
Dynamic Mechanical Properties ◽  
Diameter Ratio ◽  
Dynamic Mechanical Property ◽  
Dynamic Mechanical ◽  
Good Ability ◽  
Impact Protection ◽  
Hollow Ball

The natural structures have excellent dynamic mechanical properties. In this work, an impact protection structure inspired by the C60 molecule was proposed. And a model of a hollow ball protected by the bio-inspired C60 molecular structure during a drop testing was built. For the bio-inspired C60 molecular structure, the drop process and the dynamic mechanical property was investigated by LS-DYNA software. The results indicate that the bio-inspired C60 molecular structure has a good ability to protect against impact. Furthermore, the effects of the diameter ratio, materials, drop height, and angle were discussed. These variations of geometry and material can influence the dynamic mechanical properties of the bio-inspired C60 molecular impact protection structure.

Study of Microstructure and Dynamic Mechanical Analysis of Biodegradable Tableware Produced with Corn Straw

2011 ◽  
Vol 380 ◽  
pp. 160-163 ◽  
Author(s):  
Alun ◽  
Zhi Hui Sun ◽  
Quan Rong Jing ◽  
Ri Dun Hu ◽  
Chun Li Yang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Storage Modulus ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Dynamic Mechanical Property ◽  
Corn Straw ◽  
Dynamic Mechanical ◽  
Scan Electronic Microscope ◽  
Electronic Microscope

This paper focused on biodegradable tableware processed with plant fiber, which were obtained by mechanical processing corn straw, abundant in Heilongjiang Province of China. Firstly, the microstructure characteristics of tableware were described by Scan Electronic Microscope (SEM). Secondly, the dynamic mechanical property of biodegradable tableware was analyzed by DMA, which will provide a reference to optimize the biodegradable tableware design in future. And the dynamic mechanical property of biodegradable tableware also was compared with the dynamic mechanical properties of the plastic snack box. The results showed that biodegradable tableware had a highly storage modulus (E′) originally, it was 3216MPa,while the maximum storage modulus (E′) of plastic snack box was 852MPa. And the results also indicated that the treat temperature has a significant effect on the dynamic mechanical properties of biodegradable tableware, as the treat temperature increased closely to 95°C, the biodegradable tableware appeared glassy transition, but the storage modulus (1650MPa) was still much higher than that of the plastic snack box.

Chain Structure and Dynamic Mechanical Property of the Vinylidenefluoride and Chlorotrifluoroethylene Copolymers

2014 ◽  
Vol 1049-1050 ◽  
pp. 123-128
Author(s):  
Guo Ping Zeng ◽  
Chun Bo Yue ◽  
Ya Qing Weng ◽  
Ming Yu Wang ◽  
Heng Feng Li
Keyword(s):  
Mechanical Properties ◽  
Random Distribution ◽  
Dynamic Mechanical Properties ◽  
Chain Structure ◽  
Radical Copolymerization ◽  
Dynamic Mechanical Property ◽  
Diffraction Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dynamic Mechanical

A series of vinylidenefluoride (VDF) and chlorotrifluoroethylene (CTFE) copolymers were prepared by radical copolymerization, the chain elements structures of the copolymers were gain with the elemental analysis, and the crystal regions with X-ray diffraction spectrum. The effect of chain elements structure on the crystallinity and dynamic mechanical properties was discussed with the DMA analysis. The result shows: the increasing of the CTFE content decreases the chain elements structure of VDF-VDF, the random distribution of VDF-CTFE structure has a great effect on the crystallization properties and the dynamic mechanical properties. The increasing of CTFE content improves the storage modulus and the damping of copolymers in the amorphous copolymers, while the distribution of chain segments’ length gets narrower.

scholarly journals Study on dynamic mechanical properties of O-ring with large ring diameter ratio based on metal rubber

2021 ◽  
Author(s):  
Xiaoyuan Zheng ◽  
Zhiying Ren ◽  
Yangyang Yang ◽  
Hongbai Bai ◽  
Yi Liang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Consumption ◽  
Loss Factor ◽  
Engineering Application ◽  
Dynamic Mechanical Properties ◽  
Diameter Ratio ◽  
Range Analysis ◽  
Dynamic Mechanical ◽  
Large Ring ◽  
Metal Rubber

Abstract The demand for High temperature resistant metal rubber seals (MRS) with large ring-to-diameter ratio is very urgent in the industrial field. In this work, an O-type MRS with a large ring-to-diameter ratio was developed by embedding the spiral network metal rubber into the stainless steel ring with a special preparation process. The effects of frequency, porosity, and amplitude on the dynamic experimental performance of O-type MRS were studied in detail. The mechanical properties of the MRS were characterized by dynamic tests, and the damping sensitivity were analyzed by orthogonal tests. The results show that MRS has better stability under different frequencies of vibration. The energy consumption and loss factor of the sample increase with increases of porosity. With an increase in loading amplitude, the energy consumption and loss factor of the same porosity test sample increases, whereas the dynamic average stiffness of the specimen gradually decreases. Furthermore, the range analysis of the orthogonal experiment shows that the factors affecting the damping performance of the seal are porosity>amplitude>frequency. This study fills in the dynamic mechanical properties of O-shaped MRS, and provides a certain foundation for the engineering application of O-shaped MRS.

scholarly journals Manipulating the thermal and dynamic mechanical properties of polydicyclopentadiene via tuning the stiffness of the incorporated monomers

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 355-364 ◽  
Author(s):  
Jia Kuang ◽  
Nan Zheng ◽  
Chenglin Liu ◽  
Yubin Zheng
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Dynamic Mechanical Properties ◽  
Polymer Structure ◽  
Dynamic Mechanical Property ◽  
Optimal Conditions ◽  
Dynamic Mechanical ◽  
Curing Agents ◽  
The Relationship ◽  
Polymerization Conditions

AbstractThe application of polydicyclopentadiene (polyDCPD) as a high-performance thermosetting resin is often hindered by the simplicity and limitation of the polymer structure, making it unlikely to improve their thermal and dynamic mechanical properties by further optimizing the polymerization conditions. In this study, we developed a copolymer system which consisted of dicyclo-pentadienes and various designed monomers as excellent curing agents. The incorporated monomers bearing different stiffness and rigidity contain two active functional groups at the end of the structures and are capable of reinforcing original polyDCPD. The incorporated monomers notably enhanced the thermal and dynamic mechanical properties of polyDCPD. Besides that, the relationship between the stiffness of the monomer and the thermal and dynamic mechanical properties of polyDCPD was evaluated in detailed. Because of the simplicity and adjustability of copolymerization approach, optimal conditions of the copolymers with best property-reinforcing capability were systemically identified. The optimal materials displayed desired thermal and dynamic mechanical property and markedly outperformed the original polyDCPD.

Polyurethanes based on hydroxylated rapeseed oil: thermal and dynamic mechanical properties

2015 ◽  
Vol 37 (2) ◽  
pp. 162-167
Author(s):  
V.A. Vilensky ◽  
◽  
L.V. Kobrina ◽  
S.V. Riabov ◽  
Y.Y. Kercha ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rapeseed Oil ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical
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