Experimental study of shrinkage and ejection forces of reinforced polypropylene based on nanoclays and short glass fibers

2017 ◽  
Vol 58 (1) ◽  
pp. 55-62 ◽  
Author(s):  
M. C. R. Garcia ◽  
A. C. S. Netto ◽  
A. J. Pontes
Keyword(s):  
Experimental Study ◽  
Glass Fibers ◽  
Short Glass

Correlation of fatigue behavior and dynamic mechanical properties of hybrid composites of polypropylene/short glass fibers/hollow glass beads

2021 ◽  
pp. 089270572199319
Author(s):  
Gustavo B Carvalho
Keyword(s):  
Stress Relaxation ◽  
Flexural Strength ◽  
Relaxation Rate ◽  
Hybrid Composites ◽  
Fatigue Behavior ◽  
Glass Fibers ◽  
Glass Beads ◽  
Hollow Glass ◽  
Dynamic Mechanical ◽  
Short Glass

Ternary hybrid composites of Polypropylene (PP)/Short Glass Fibers (GF)/Hollow Glass Beads (HGB) were prepared using untreated and aminosilane-treated HGB, compatibilized with maleated-PP, and with varying total and relative GF/HGB contents. Static/short-term flexural strength properties data revealed, through lower flexural strength values, that the presence of untreated HGB particles induces to fiber-polymer interfacial decoupling at much higher extent than in the presence of aminosilane-treated HGB particles. This phenomenon is also evident when evaluating the data from displacement-controlled three-point bending fatigue tests. Monitored up to 106 cycles, the analyzed hybrid composites presented distinct performance relative to their fatigue stress relaxation rate: the lower the matrix-reinforcements’ interfacial adhesion, more pronounced the stress relaxation rate as a function of the number of fatigue cycles. Dynamic Mechanical Thermal Analysis (DMTA) results could successfully reveal the hybrid composites behavior at the microstructural level when they were submitted to both static flexural test and fatigue, depending on the degree of interfacial interactions between the polymer matrix of PP and the hybrid reinforcements of GF and HGB (with and without aminosilane surface treatment).

scholarly journals A Fatigue Damage Model for Life Prediction of Injection-Molded Short Glass Fiber-Reinforced Thermoplastic Composites

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2250
Author(s):  
Mohammad Amjadi ◽  
Ali Fatemi
Keyword(s):  
Injection Molding ◽  
Glass Fiber ◽  
Fatigue Damage ◽  
Life Prediction ◽  
Glass Fibers ◽  
Damage Model ◽  
Fiber Reinforced ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Short Glass

Short glass fiber-reinforced (SGFR) thermoplastics are used in many industries manufactured by injection molding which is the most common technique for polymeric parts production. Glass fibers are commonly used as the reinforced material with thermoplastics and injection molding. In this paper, a critical plane-based fatigue damage model is proposed for tension–tension or tension–compression fatigue life prediction of SGFR thermoplastics considering fiber orientation and mean stress effects. Temperature and frequency effects were also included by applying the proposed damage model into a general fatigue model. Model predictions are presented and discussed by comparing with the experimental data from the literature.

A novel study of flexural behavior of short glass fibers as secondary reinforcements in GFRP composite

2021 ◽  
Author(s):  
Srinivasu Dasari ◽  
Shiny Lohani ◽  
Soumya Sumit Dash ◽  
Abhinav Omprakash Fulmali ◽  
Rajesh Kumar Prusty ◽  
...  
Keyword(s):  
Glass Fibers ◽  
Flexural Behavior ◽  
Gfrp Composite ◽  
Short Glass

Evaluation of Process Wear of Selected Tool Steels for Injection Molds

2013 ◽  
Vol 739 ◽  
pp. 171-176 ◽  
Author(s):  
František Greškovič ◽  
Ľudmila Dulebová ◽  
Branislav Duleba ◽  
Janusz W. Sikora
Keyword(s):  
Adhesive Wear ◽  
Glass Fibers ◽  
Polymeric Materials ◽  
Tool Steels ◽  
Screw Extruder ◽  
Laboratory Equipment ◽  
Before And After ◽  
Twin Screw ◽  
Weight Decrease ◽  
Short Glass

The aim of this contribution is to test the suitability of selected types of tool steels used for manufacturing of injection molds. Experiments were realized by the simulation of adhesive wear using laboratory equipment Amsler, which allows the testing of grinding pairs. Evaluated grinding pairs consisted of tool steel and two types of roundels. Tested polymeric materials were based on pure PA6 and PBT filled with short glass fibers, prepared by mixing process in twin screw extruder. The wear of five types of tool steels were evaluated by weight decrease before and after the experiment, while changing the friction coefficient of grinding pairs, material of grinding pairs and sensing the roughness of steel before and after wear.

scholarly journals The structure, composition and preparation of injection-molded composite materials based on glass-filled polysulfone

2019 ◽  
Vol 14 (4) ◽  
pp. 39-44
Author(s):  
A. B. Baranov ◽  
T. I. Andreeva ◽  
I. D. Simonov-Emelʼyanov ◽  
O. E. Peksimov
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Glass Fibers ◽  
Critical Length ◽  
Fiber Concentration ◽  
Extrusion Head ◽  
Short Glass Fiber ◽  
Twin Screw ◽  
Time Optimal ◽  
Short Glass

In the course of this study, compositions and designed structures for the polysulfone (PSF) and short glass fibers systems were calculated. Additionally, disperse-filled polymer composite materials (DFPCM) based on PSF-190 were classified in accordance with their respective structures, and the optimal amount of glass fiber (13.5–18.5 vol %) was determined. This article describes the production of DFPCM using PSF and a short glass fiber with a twin-screw extruder (Labtech Engineering Company LTD, model Scientific FIC 20-40). Furthermore, optimal mixing parameters for the creation of composites wherein the glass fiber length exceeds the critical length (lcr) were established. The critical length was calculated, and the curves for fiber size distribution of polysulfone composites were depicted, and a difference in fiber concentration between the dispenser and the extrusion head (up to ~10–15%) was found when the fiber content was at 18–25 vol %. For the first time, optimal parameters (which pertain to medium-filled dispersions) for the structure of DFPCM based on PSF and short glass fiber are able to be demonstrated. 

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