Analysis of the Mechanical Properties of Composite Boards with Natural Resin and Guadua Unidirectional Fibers

2018 ◽  
Keyword(s):  
Mechanical Properties ◽  
Natural Resin ◽  
Unidirectional Fibers

scholarly journals A Study Regarding the Mechanical Properties of a Hybrid Matrix with Various Volume Proportions of Dammar

2020 ◽  
Vol 57 (1) ◽  
pp. 133-140
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stanescu ◽  
Ion Ciuca ◽  
Cosmin Mihai Miritoiu ◽  
Alin Dinita ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Vibration Mode ◽  
Vibration Damping ◽  
The Other ◽  
Damping Properties ◽  
Elongation At Break ◽  
Hybrid Resin ◽  
Natural Resin ◽  
Volume Proportion

This paper studies the influence of the volume proportion between components on the mechanical behaviour of a hybrid resin obtained by combining the natural resin Dammar and epoxy resin. We analyse three sets of hybrid resin samples, in which we used a Dammar volume proportion of 60%, 70%, and 80% respectively and epoxy resin (employed together with its associated reinforcement in order to generate a quick process of polymerization). Following the tensile test we found the characteristic curves, the tensile strength and the elongation at break for each of the three types of resins. We also looked into the vibration damping properties of bars made of this resin. We experimentally determined the frequency and the damping coefficient of the first particular vibration mode for one bar taken out of each set of resins, with one end fixed and the other free. On the basis of the results, we calculated the loss coefficient for each type of resin.

scholarly journals A Study of Some Mechanical Properties of Composite Materials with a Dammar-Based Hybrid Matrix and Reinforced by Waste Paper

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1688
Author(s):  
Marius Marinel Stănescu ◽  
Dumitru Bolcu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Volume Ratio ◽  
Tensile Tests ◽  
Sem Analysis ◽  
Waste Paper ◽  
Hybrid Resin ◽  
Natural Resin ◽  
Tensile Response

When obtaining environment-friendly hybrid resins made of a blend of Dammar natural resin, in a prevailing volume ratio, with epoxy resin, it is challenging to find alternatives for synthetic resins. Composite materials reinforced with waste paper and matrix made of epoxy resin or hybrid resin with a volume ratio of 60%, 70% and 80% Dammar were studied. All samples obtained have been submitted to tensile tests and Scanning Electron Microscopy (SEM) analysis. The tensile response, tensile strength, modulus of elasticity, elongation at break and the analysis of the fracture surface were determined. The damping properties of vibrations of bars in hybrid resins and in the composite materials under study were also examined. The mechanical properties of the four types of resins and of the composite materials were compared. The chemical composition for a hybrid resin specimen were obtained using the Fourier Transformed Infrared Spectroscopy (FTIR) and Energy, Dispersive X-ray Spectrometry (EDS) analyzes.

scholarly journals Experimental Analysis on Mechanical Properties of Natural Bio-Polymer Composite

2021 ◽  
Vol 16 (1) ◽  
pp. 012-017
Author(s):  
Sudalai Raja A ◽  
Jebakani D
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Neem Oil ◽  
Testing Methods ◽  
Medical Field ◽  
Natural Resin ◽  
Tensile Impact ◽  
Sporting Goods ◽  
Screw Pine ◽  
Bio Material

Bio-composites are used in many engineering applications due to various desirable properties that they offer such as light weight, low cost, bio-degradable and bio-compatible. Bio-composites are used in many industries such as automotive, sporting goods, marine, electrical and household appliances. Kenaf, jute, banana, flux is used as fibers. The mechanical properties are evaluated by appropriate testing methods. The strength of material is important to each material so that bio-material to be evaluated by mechanical testing methods. In this study an attempt is made to prepare natural resin with neem oil and Thennamarakudi oil and to fabricate Bio-composite with fish shell and screw pine fiber as reinforcement and test for its mechanical properties such as tensile, Impact and Flexural. The pure resin samples have tensile and flexible properties. After taken testing. the neem oil-based biomaterial flexibility is higher than the oil-based biomaterial. The stiffness is higher in Tk oil-based biomaterial. The result is expected from the biomaterial as eco-friendly material and applicable for medical field as biocompatible

Ultimate strength prediction of two-dimensional tri-axial braided composites based on an analytical laminate model

2018 ◽  
Vol 37 (13) ◽  
pp. 917-929 ◽  
Author(s):  
Min Jing ◽  
Jian Wu ◽  
Yaqiong Deng ◽  
Wei Ye ◽  
Huiming Ning ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Failure Analysis ◽  
Ultimate Strength ◽  
Present Model ◽  
Strength Prediction ◽  
Two Dimensional ◽  
Braided Composites ◽  
Surrounding Matrix ◽  
Unidirectional Fibers ◽  
Series Of Experiments

An analytical laminate model was newly proposed to predict the ultimate strengths of two-dimensional tri-axial braided composites under in-plane loadings. The composite was modeled as a laminate possessing four plies. Among these four plies, there were three plies consisting of unidirectional fibers along with surrounding matrix and one ply containing only matrix. A progressive ply failure analysis was performed. A series of experiments were conducted. The present model was verified experimentally by using our and other researchers’ data. Moreover, we compared this model’s results with the numerical ones obtained by us. The results show that the present model has the potential to predict the effective elastic properties and ultimate strengths of two-dimensional tri-axial braided composites. Finally, the effect of the braid angle on the mechanical properties of a two-dimensional tri-axial braided composite was explored based on the mentioned model.

Mechanical performance of intraply and inter-intraply hybrid composites based on e-glass and polypropylene unidirectional fibers

2016 ◽  
Vol 51 (3) ◽  
pp. 381-394 ◽  
Author(s):  
MA Attia ◽  
MA Abd El-baky ◽  
AE Alshorbagy
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Mechanical Performance ◽  
Hybrid Composites ◽  
Stacking Sequence ◽  
Unidirectional Fibers ◽  
Interlaminar Shear ◽  
Hybrid Configuration ◽  
Intraply Hybrid Composite

The aims of this study are to design, fabricate and investigate the mechanical properties of new hybrid composite laminates made from polypropylene-glass unidirectional fibers and epoxy matrix. Specimens were fabricated following the hand lay-up technique in intraply and inter-intraply configurations. Results are presented regarding the tensile, flexural, in-plane shear and interlaminar shear behaviors of fabricated composites with particular consideration of the effects of the plies stacking sequence and hybrid configuration. The experimental results reveal that the mechanical properties of polypropylene/epoxy composite can be effectively improved by the incorporation of glass fiber through the formation of either intraply or inter-intraply hybrid composites. With a proper choice of the hybrid configuration and the plies stacking sequence, the fabricated hybrid composites achieved property profiles close to those of homogeneous glass reinforced laminate in terms of specific properties. Resistance of the intraply hybrid composite to tensile and flexural loadings is higher than inter-intraply hybrid composites. On the other hand, the highest in-plane and interlaminar shear strengths are associated with the inter-intraply hybrid composite with glass fiber core. Additionally, an analytical analysis was also introduced to provide a good correlation with the experimental data, which give an insight on the ideal plies stacking sequence to achieve the required properties.

scholarly journals Experimental Research into the Mechanical Behaviour of Dammar and Sandarac - Based Bio Resins

2019 ◽  
Vol 56 (1) ◽  
pp. 1-5
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stanescu ◽  
Ion Ciuca ◽  
Alin Dinita ◽  
Adrian Rosca ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Epoxy Resin ◽  
Mechanical Behaviour ◽  
Tensile Testing ◽  
Sem Analysis ◽  
Polymerization Process ◽  
Natural Resin ◽  
Volume Proportion ◽  
Reinforcing Material

In this paper, we examine two types of Dammar-based bio resins. In the first type, Dammar alone is used as natural resin, while in the second type a mixture of 70% Dammar and 30% Sandarac is used. Three sample sets were made of each of these resins with a bio resin volume proportion of 55, 65 and 75% respectively, the rest being epoxy resin (used, together with the associated reinforcing material, to generate a quick polymerization process). A SEM analysis is carried out and the surface roughness of each of the studied materials. A series of mechanical properties, determined by tensile testing, are presented. We have determined the characteristic curves, tensile strength and modulus of elasticity and the influence of the epoxy resin volume proportion on the mechanical behaviour of bio resins.

scholarly journals Studies of chemical and mechanical properties of hybrid composites based on natural resin Dammar formulated by epoxy resin

2020 ◽  
Author(s):  
M. Heiko Franz ◽  
Ion Neda ◽  
Catalin V. Maftei ◽  
Ion Ciuca ◽  
Dumitru Bolcu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Hybrid Composites ◽  
Natural Resin

scholarly journals A Study of Some Mechanical Properties of a Category of Composites with a Hybrid Matrix and Natural Reinforcements

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 478 ◽  
Author(s):  
Marius Stănescu ◽  
Dumitru Bolcu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Wheat Straw ◽  
Damping Properties ◽  
Hybrid Resin ◽  
Hybrid Matrix ◽  
Natural Resin

The current composite materials must meet a double challenge, one that involves obtaining mechanical properties suitable to the field of activity in which they are used and another one, equally important, that requires that they be renewable. In this paper, we have obtained a category of composite materials that have natural reinforcements (fabrics of flax, cotton, hemp, cattail leaves, and wheat straw). As a matrix, we have used three types of hybrid resin, in the composition of which we used the natural resin dammar, in different majority volume proportions. The differences, up to 100%, were represented by epoxy resin and its associated reinforcement, to generate a quick process of polymerization. We have measured certain mechanical properties and the damping properties of the three types of hybrid resin and of the composite materials under study. Based on these properties, we point out a few fields of activity where these composite materials can be used.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

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