Mechanical Properties and Dynamic Mechanical Behavior for Long Aramid Fiber Reinforced Impact Polypropylene Copolymer

2012 ◽  
Vol 591-593 ◽  
pp. 1079-1082 ◽  
Author(s):  
Hao Tan ◽  
Hong Sheng Tan ◽  
Xin Lei Tang ◽  
Yan Gang Wang ◽  
Li Ping Li
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Aramid Fiber ◽  
Fiber Reinforced ◽  
Aramid Fibers ◽  
Dynamic Mechanical ◽  
Composite Deformation ◽  
Dynamic Mechanical Behavior ◽  
Single Screw Extruder ◽  
Impact Polypropylene Copolymer

Composites of continuous aramid fiber reinforced impact polypropylene copolymer (IPC) were prepared using a cross-head impregnation mold by self-design fixed on a single screw extruder, and pelleted by a pelleter for injection molding to prepare testing specimens. The mechanical properties of long aramid fibers reinforced impact polypropylene copolymer (IPC) composites were studied. Micrographs of fracture surface of tensile specimens and dynamic mechanical behavior for the composites were analyzed by scanning electron microscope (SEM) and dynamic mechanical analyzer (DMA). The results of experiments show that, the tensile and flexural strengths increased obviously with the aramid fibers content in the composites. SEM results show the compatibility between the aramid fiber and matrix is very poor. The results of the dynamic mechanical behavior of long aramid fibers reinforced IPC composites show that the composite deformation resistance and glass transition temperature increased evidently with the addition of aramid fibers.

scholarly journals Dynamic Mechanical Behavior of Fiber-Reinforced Seawater Coral Mortars

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 118
Author(s):  
Wu-Jian Long ◽  
Jiangsong Tang ◽  
Hao-Dao Li ◽  
Yaocheng Wang ◽  
Qi-Ling Luo
Keyword(s):  
Elastic Modulus ◽  
Mechanical Behavior ◽  
Storage Modulus ◽  
Loss Factor ◽  
Fiber Reinforced ◽  
Replacement Rate ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior ◽  
Pva Fiber ◽  
Mechanical Strengths

Coral aggregate has been widely used for island construction because of its local availability. However, the addition of coral aggregate exaggerates the brittle nature of cement-based materials under dynamic loading. In this study, polyvinyl alcohol (PVA) fiber was used to improve dynamic mechanical behavior of seawater coral mortars (SCMs). The effects of coral aggregate and PVA fiber on the workability, static mechanical strengths, and dynamic mechanical behavior of fiber-reinforced SCMs were investigated. Results showed that the workability of the SCM decreased with increasing coral aggregate replacement rate and PVA fiber content. Mechanical strengths of the SCM increased with increasing PVA fiber content, but decreased with increasing coral aggregate replacement rate. Dynamic mechanical behavior at varying coral aggregate replacement rates was analyzed by combining dynamic mechanical analysis and micro-scale elastic modulus experiment. With increasing coral aggregate replacement rate, the storage modulus, loss factor, and elastic modulus of the interfacial transition zone in the SCM decreased. Nevertheless, with the incorporation of PVA fibers (1 vol.%), the storage modulus and loss factor were improved dramatically by 151.9 and 73.3%, respectively, compared with the reference group. Therefore, fiber-reinforced coral mortars have a great potential for use in island construction, owing to the excellent anti-vibrational performance.

Preparation Process of Long Fiber Reinforced Impact Polypropylene Copolymer Composites

2014 ◽  
Vol 527 ◽  
pp. 17-20
Author(s):  
Li Ping Li ◽  
Hong Sheng Tan ◽  
Yu Fei Liu ◽  
Zhe Xing Tan ◽  
Xue Jing Liu
Keyword(s):  
Mechanical Properties ◽  
Interfacial Adhesion ◽  
Fiber Reinforced ◽  
Matrix Resin ◽  
Screw Extruder ◽  
Continuous Glass ◽  
Single Screw Extruder ◽  
Continuous Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Impact Polypropylene Copolymer

Composites of continuous glass fiber reinforced impact polypropylene copolymer (IPC) were prepared by using a cross-head impregnation mold by a self-designed die fixed on a single screw extruder, and were chopped into Long fiber/IPC pellets approximately 12 mm in length. The effect of preheat temperature and pulling speed on the mechanical properties of the composites were studied and micrographs of fracture surface of impact specimens for the composites were investigated by scanning electron microscope (SEM). Mechanical properties of the composites were best at 200 °C of the preheated temperature, for the better interfacial adhesion between glass and matrix resin, and that proved by the SEM. Meanwhile, mechanical properties of the composites decreasing with the increasing of pulling speed, for the impregnation effect degraded.

The Beer Can as a Shock Absorber

1973 ◽  
Vol 95 (4) ◽  
pp. 224-226 ◽  
Author(s):  
P. H. Wirsching ◽  
R. C. Slater
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Energy Absorption ◽  
Impact Velocity ◽  
Shock Absorber ◽  
Dynamic Testing ◽  
Longitudinal Axis ◽  
Total Force ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior

Static and dynamic testing performed on steel beer and soda cans has indicated that the cans, when loaded along the longitudinal axis, possess mechanical properties ideal for shock absorption. The static and dynamic mechanical behavior of the 12 oz steel cans is presented. It was shown that the energy absorption capability of the cans is not strongly dependent upon impact velocity. Moreover it was shown that pneumatic forces caused by air entrapped in the cans contribute significantly to the total force in the can during impact.

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