scholarly journals EVALUATION OF GROOVING METHOD TO POSTPONE DEBONDING OF FRP LAMINATES IN WPC-FRP BEAMS

2014 ◽  
Vol 20 (2) ◽  
pp. 237-246 ◽  
Author(s):  
Shahin Lale Arefi ◽  
Morteza Naghipour ◽  
Zenonas Turskis ◽  
Mehdi Nematzadeh
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Construction Material ◽  
Surface Preparation ◽  
Economic Benefits ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Reinforced Plastic ◽  
Economic Failure ◽  
Frp Sheet

The use of lightweight construction material with high corrosion resistance and low cost plays an important role in the design and construction of marine structures such as waterfronts. One of the most common methods for strengthening the structures is composite fibre reinforced plastic (FRP) sheet that is used for member retrofitting including wood plastic composite (WPC). The WPC material is produced from wood and compressed resin, which has good mechanical properties as well as economic benefits. The main problem of WPC reinforced with FRP sheets is the debonding of the sheet from WPC surface, which leads to premature and non-economic failure in members. One of the existing methods to solve this problem is surface preparation. However, surface preparation of wood plastic composite has some additional problems, such as operational cost, environmental pollution, etc. Therefore, to avoid debonding, another method has been used, known as the grooving method at the lower parts of beams. The laboratory used 50 I-shaped specimens with the same geometrical and mechanical properties. Initially, some slots such as longitudinal, transverse and diagonal grooves were created on the surface of specimens and filled by an epoxy. All beams were armed using one or two layers of GFRP sheets embedded at the lower part and were tested under four-point flexural loading. Grooves of different shapes, various widths and depths as well as the number of reinforcement layers were determined for considering their effect on the beam's behaviour. The results expressed that the debonding of FRP sheets can be delayed by selecting the longitudinal grooves with certain width and depth, which also leads to resistance improvement.

scholarly journals Destructive Testing of Wood Plastic Composite

2019 ◽  
Vol 57 (2) ◽  
pp. 208-214
Author(s):  
Zuzana Mitalova ◽  
Juliana Litecka ◽  
Dusan Mital ◽  
Marta Harnicarova ◽  
Jan Valicek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Tensile Test ◽  
Low Cost ◽  
Natural Fibres ◽  
Bending Test ◽  
Low Density ◽  
Wood Plastic Composite ◽  
Destructive Testing ◽  
Plastic Composite

The paper deals with destructive testing of �new� group of material - Wood Plastic Composite (in short WPC). WPC emerging from a fusion of two different kinds of components - thermoplastics matrix and natural reinforcement (fibres or flour). Natural fibres offer several advantages - they are renewable, inexpensive, low-density, good isolate a sound and low cost. These components are mixed under the influence of high temperature and then pressed to make various shapes. This material contains cracks localized on the interface between the wood and plastic. These cracks occurred due to inhomogeneity of WPC and affected mechanical properties of final WPC product. The testing of mechanical properties (tensile test and bending test) were determinate in VUHZ Dobra (Ostrava) - following the ISO standards. Significant differences between mechanical properties after testing were caused by non-perfect encapsulation between components and non-homogeneity of materials.

scholarly journals Choosing a Proper Method for Strengthening WPC Beams with Grooving Method Using Swara-Edas

2018 ◽  
Vol 64 (4) ◽  
pp. 161-174 ◽  
Author(s):  
Mahdi Chini ◽  
Shahin Lale Arefi ◽  
Sarfaraz Hashemkhani Zolfani ◽  
Leonas Ustinovicius
Keyword(s):  
Contact Surface ◽  
Wood Plastic Composite ◽  
Marine Structures ◽  
Lightweight Material ◽  
Fracture Modes ◽  
Plastic Composite ◽  
Reinforced Plastic ◽  
Speed Performance ◽  
Resistance Performance ◽  
Frp Sheet

AbstractWood plastic composite (WPC) is a lightweight material, resistant against corrosion and damage, with recyclability of consuming materials. These materials usually used in marine structures frequently due to their unique features. In order to strengthen beams made by this material, usually Fibre-reinforced plastic (FRP) sheets are used, and one of the fracture modes in these beams is debonding of FRP sheet from the surface of the beams. To deal with this problem some grooves are used in the surface of the beam to improve the contact surface. The grooves include longitudinal, transverse and diagonal grooves. The main goal of this study is to assess different grooving methods in WPC-FRP beams. In this regard, primarily criteria (improving resistance, performance speed, performance complexity, performance costs, displacement and absorbing energy) were determined through interviews with experts in this field in order to assess the beams. Then, SWARA method employed to evaluate criteria with a policy based perspective and finally EDAS method applied for evaluating related alternatives. Based on obtained results, the longitudinal groove method is the best way of strengthening WPC beams to prevent debonding.

Mechanical Properties of 3D-Printed Wood-Plastic Composites

2018 ◽  
Vol 777 ◽  
pp. 499-507 ◽  
Author(s):  
Ossi Martikka ◽  
Timo Kärki ◽  
Qing Ling Wu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
3D Printing ◽  
Impact Strength ◽  
Polylactic Acid ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
Plastic Composite ◽  
Plastic Composites ◽  
3D Printed

3D printing has rapidly become popular in both industry and private use. Especially fused deposition modeling has increased its popularity due to its relatively low cost. The purpose of this study is to increase knowledge in the mechanical properties of parts made of wood-plastic composite materials by using 3D printing. The tensile properties and impact strength of two 3D-printed commercial wood-plastic composite materials are studied and compared to those made of pure polylactic acid. Relative to weight –mechanical properties and the effect of the amount of fill on the properties are also determined. The results indicate that parts made of wood-plastic composites have notably lower tensile strength and impact strength that those made of pure polylactic acid. The mechanical properties can be considered sufficient for low-stress applications, such as visualization of prototypes and models or decorative items.

Analysis on mechanical properties of wood plastic composite

2020 ◽  
Author(s):  
K. Bhaskar ◽  
D. Jayabalakrishnan ◽  
M. Vinoth Kumar ◽  
S. Sendilvelan ◽  
M. Prabhahar
Keyword(s):  
Mechanical Properties ◽  
Wood Plastic Composite ◽  
Plastic Composite

scholarly journals Evaluasi Kuat Tumpu Alat Sambung Baut pada Papan WPC dari Limbah Sengon dan Plastik HDPE

2016 ◽  
Vol 22 (2) ◽  
pp. 129
Author(s):  
Yudhi Arnandha ◽  
Iman Satyarno ◽  
Ali Awaludin ◽  
Arfiati Fardhani
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Shear Wall ◽  
High Shear ◽  
Wood Plastic Composite ◽  
Bearing Strength ◽  
Plastic Composite ◽  
Structural Purpose ◽  
High Shear Strength ◽  
Bolt Diameter

Wood Plastic Composite (WPC) is wood based material that been produce by mixing sawdust as main composition and plastic polymer as bonding agent. Nowadays, WPC board already been produced in Indonesia using Sengon sawdust and recycle HDPE plastic. Sengon sawdust was used as WPC since its availability from plywood production waste, moreover HDPE plastic considered had higher strength and more rigid than PET plastic. WPC occasionally being used as non structural material, moreover from previous study about mechanical properties of WPC, it was found that WPC Sengon has high shear strength around 25 – 30 MPa. These lead that WPC Sengon had a potential used as shear wall sheathing, thus additional research need to be conducted in order to study the type of bolt and diameter of the bolt can be used for these shear wall. This study aimed to investigate the dowel bearing of bolt using full hole method based on ASTM D5764 with type and bolt diameter as specimen variation. Two types of bolt were used in this study; stainless bolt and standard bolt with diameter each of 6 mm, 8 mm, 10 mm and 12 mm. According to ANOVA, there was insignificant result between stainless bolt and standard one, but there was significant result based on diameter of the bolt. Hereafter, it can be recommended the used of 10 mm diameter of bolt for structural purpose with dowel bearing strength around 67 – 70 MPa.

The Influence of Fiber Surface Treatment and SBR as Impact Modifier on Rheological Behavior and Mechanical Properties of Wood Plastic Composite from Acrylate-Styrene-Acrylonitrile and Bagasse

2017 ◽  
Vol 737 ◽  
pp. 281-286 ◽  
Author(s):  
Pornsri Sapsrithong ◽  
Kesinee Puksattee ◽  
Kingkaew Saewjaidee ◽  
Navapon Pensuk ◽  
Apaipan Rattanapan
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Surface Treatment ◽  
Rheological Behavior ◽  
Fiber Surface ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Styrene Acrylonitrile ◽  
Impact Modifier ◽  
Fiber Surface Treatment

Morphology, mechanical properties and rheological behavior of wood plastic composite, derived from acrylate-styrene-acrylonitrile (ASA) and bagasse which was treated with potassium permanganate (KMnO4) and using styrene butadiene rubber (SBR) as impact modifier, were reported. The effect of fiber surface treatment with KMnO4 and different amount of SBR on properties of wood plastic composite, prepared from ASA and 50 phr of bagasse, were investigated. Wood plastic composites (both treated and untreated) with varying amount of SBR, as impact modifier from 0-15 wt% of ASA, were prepared by melt-blending technique. The specimens were shaped with a compression molding machine and characterized, including morphology, impact strength, flexural properties and rheological behavior. It was demonstrated that the fiber surface treatment, using KMnO4, could effectively impove interfacial adhesion between bagasse and ASA matrix. These led to an improvement of morphology and mechanical properties such as impact strength, flexural strength and modulus. SEM micrographs revealed that the interfacial modification enhanced the interfacial adhesion between bagasse (fiber) and ASA (matrix) causing an increasing of shear stress and shear viscosity. Additionally, the effect of amount of SBR, as impact modifier, was also reported. The resulted showed that the impact strength was improved with increasing the amount of SBR (up 5 wt% of ASA) whereas, flexural strength and modulus were found to decrease with increasing SBR content.

Mechanical Properties of Paper Thermosetting Resin Composites by Various Paper Materials

2014 ◽  
Author(s):  
Takanori Kitamura ◽  
Qianjin Zhang ◽  
Kanta Ito ◽  
Suguru Teramura ◽  
Zhiyuan Zhang ◽  
...  
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Rolling Direction ◽  
Thermosetting Resin ◽  
Paper Recycling ◽  
Recycled Paper ◽  
Plastic Composite ◽  
Reinforced Plastic ◽  
Fracture Area ◽  
Wood Consumption

Recycling and reusing is a noticeable method for environment protecting. Recycled paper is one of the most successful cases as it contributes to energy saving, low cost, low wood consumption and environmental protection. During paper recycling process, many different kinds of raw materials can be used. Paperboards made of different raw materials showed different properties. In this study, three kinds of raw materials were selected to fabricate paperboards respectively combining with thermosetting resin, paperboards reinforced plastic composite was laminated by hand layup method. Detailed observation were carried out to analysis the molding stations including the tensile property which was investigated on both unnotched and notched specimens, besides, to investigate the anisotropy, tensile test was conducted on the specimens both in machine rolling direction and transverse direction. SEM was also employed to observe the materials and fracture area respectively.

Research on Surface Quality Enhancement of Wood-Plastic Composite Powder SLS Parts by Post Processing

2010 ◽  
Vol 113-116 ◽  
pp. 508-511 ◽  
Author(s):  
Wei Liang Zeng ◽  
Yan Ling Guo
Keyword(s):  
Surface Quality ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Wood Plastic Composite ◽  
Post Processing ◽  
Plastic Composite ◽  
Rp Process ◽  
Sintering Properties

According to its advantages, such as low-cost and green biological etc., Wood-Plastic Composite(WPC) is more suitable for make parts by Selective Laser Sintering(SLS) rapid prototyping (RP) process. With optimal design of components, the parts made by WPC have good mechanical properties as well as with good laser sintering properties. In order to further improve the surface quality of the parts, the post-processing–infiltrating with wax–is introduced. After post-processing, the void fraction is decreased from 51% to 7%, surface quality has been greatly improved, Ra belows 13µm on average, after polishing the surface is more smooth and Ra belows 5µm averagely，compared to those without post processing, surface roughness decrease 22% and 73% respectively.

scholarly journals Green Construction Material: Polyethylene Waste Reinforce Concrete for Panel Application

2019 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Andrie Harmaji ◽  
Siswanti Zuraida
Keyword(s):  
Mechanical Properties ◽  
Construction Material ◽  
Control Sample ◽  
Physical And Mechanical Properties ◽  
Reinforce Concrete ◽  
Plastic Waste ◽  
Composite Panel ◽  
Concrete Aggregates ◽  
Plastic Composite ◽  
Polyethylene Terephtalate

Plastic Composite Panel (PCP) is an innovation in the field of materials that uses recycling plastic waste to construct composite cement panels. This material innovation is one of the solutionto answer environmental problems caused by plastic waste. Some previous studies mostly used plastic waste for concrete aggregates. Thus, making this study different from previous studies. The purpose of this study is to make a prototype of a PCP that is environmentally friendly with panel dimensions sample of 100 x 30 x 10 mm thick. The method used is an experimental test using materials in the form of polyethylene terephtalate (PET) from used water bottle and cement waste as well as testing its physical and mechanical properties carried out in the laboratory. Variations in PET used for testing materials are 0- 20%. In addition to mechanical properties, specific gravity and porosity test is carried out. The best results shows that 5% PET addition to cement paste increase the flexutral strength to 4.47 MPa compared to control sample which has 3.26 MPa. Porosity test shows that addition of 10% PET reduce the density of PCP to 63.64% compared to control sample that has 44.44%.

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