scholarly journals Effect of fiber length and dispersion on properties of long glass fiber reinforced thermoplastic composites based on poly(butylene terephthalate)

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15439-15454 ◽  
Author(s):  
Daohai Zhang ◽  
Min He ◽  
Shuhao Qin ◽  
Jie Yu
Keyword(s):  
Glass Fiber ◽  
Fiber Length ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Butylene Terephthalate ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Long glass fiber reinforced poly(butylene terephthalate) (LGF/PBT) composites with different original glass fiber lengths were prepared using a impregnation device designed by the authors.

scholarly journals The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2019 ◽  
Author(s):  
Junjia Cui ◽  
Shaoluo Wang ◽  
Shuhao Wang ◽  
Guangyao Li ◽  
Peilin Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Ultimate Strength ◽  
Fracture Strain ◽  
Thermoplastic Composites ◽  
Strain Rates ◽  
Fiber Breakage ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Long glass fiber reinforced thermoplastic composites have been increasingly used in automotive parts due to their excellent mechanical properties and recyclability. However, the effects of strain rates on the mechanical properties and failure mechanisms of long glass fiber reinforced polypropylene composites (LGFRPPs) have not been studied systematically. In this study, the effects of strain rates (from 0.001 s−1 to 400 s−1) on the mechanical properties and failure mechanism of LGFRPPs were investigated. The results showed that ultimate strength and fracture strain of the LGFRPPs increased obviously, whereas the stiffness remained essentially unchanged with the strain rates from low to high. The micro-failure modes mainly consisted of fibers pulled out, fiber breakage, interfacial debonding, matrix cracking, and ductile to brittle (ductile pulling of fibrils/micro-fibrils) fracture behavior of the matrix. As the strain rates increased, the interfacial bonding properties of LGFRPPs increased, resulting in a gradual increase of fiber breakage at the fracture surface of the specimen and the gradual decrease of pull-out. In this process, more failure energy was absorbed, thus, the ultimate strength and fracture strain of LGFRPPs were improved.

Study on the Tensile Properties of Glass Fiber Reinforced Poly Cyclic Butylene Terephthalate Composites under and after High Temperature

2015 ◽  
Vol 727-728 ◽  
pp. 262-265
Author(s):  
Lu Zhang ◽  
Zhen Qing Wang ◽  
Ji Feng Zhang ◽  
Li Min Zhou
Keyword(s):  
High Temperature ◽  
Glass Fiber ◽  
Tensile Properties ◽  
Composite Laminates ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Melt Viscosity ◽  
Butylene Terephthalate ◽  
Glass Fiber Reinforced ◽  
Cyclic Butylene Terephthalate

A fatal disadvantage of continuously reinforced thermoplastic composites is the high melt viscosity of the matrix which hampers impregnation. However, the melt viscosity of low molecular weight cyclic butylene terephthalate resin can reach extremely low value, which simplifies impregnation and even allows for the use of thermoset production techniques resin transfer moulding. To solve the problem of the glass fiber reinforced poly cyclic butylene terephthalate composites applied in the environment of high temperature, the specimens of composite laminates were tested under and after different temperature. It has been observed that the tensile properties of GF/PCBT composites decrease with increasing temperature between room 25°C and 150°C and tend towards stability after the high temperature.

Effect of the glass fiber length on the mechanical properties of long glass fiber reinforced polyphenylene sulfide

2011 ◽  
Vol 31 (5) ◽  
Author(s):  
Hiroshi Yasuda ◽  
Yusuke Chiba ◽  
Masaru Ishikawa
Keyword(s):  
Glass Fiber ◽  
Fiber Length ◽  
Glass Fibers ◽  
Elastic Strain Energy ◽  
Fiber Surface ◽  
Polyphenylene Sulfide ◽  
Fiber Reinforced ◽  
Notched Specimen ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Abstract The effects of the length of glass fibers on the toughness of long glass fiber reinforced polyphenylene sulfide (PPS) composites (PPS-LFT), made by the pulltrusion process, were studied with regards to both the molding V notched specimen and the cutting V notched specimen. Toughness was excellent on the molding V notched specimen. By observing the fracture morphology of the molded V notched specimen, it was found that a crack was formed, due to a slip or debonding at the fiber surface. The crack was propagated along the fiber, due to the pulling out of fibers from the matrix polymer. Both the maximum load and the fracture energy increased with increasing length of the glass fiber, because the resistance created by pulling out the fibers increased with increasing fiber length. In the case of PPS-LFT, it is understood that toughness improved because the slip between the fiber and the resin occurs before the excessive elastic strain energy is stored.

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