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.

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.

Effects of EVA on the Weathering Resistance Performance of Wood Plastic Composite

2013 ◽  
Vol 741 ◽  
pp. 7-10
Author(s):  
Dong Fang Li ◽  
Fang Ru Xing ◽  
Li Li ◽  
Jian Zhang Li
Keyword(s):  
High Density Polyethylene ◽  
Wood Flour ◽  
Ethylene Vinyl Acetate ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Degradation Test ◽  
Resistance Performance ◽  
Weathering Resistance

Wood plastic composite (WPC) in this study was made from high density polyethylene (DHPE) or low density polyethylene (LDPE) with different species wood flour using extrusion. Ethylene vinyl acetate (EVA) was used to improve the weathering resistance performance of WPC. Degradation test and ageing test were employed to study the weathering stability of WPC modified by EVA. The results show that EVA can improve the ageing resistant performance of WPC and have no significant effect on the degradation resistant performance of WPC. It suggests that EVA can be used to improve the weathering resistance performance of WPC.

scholarly journals Slack-Variable Model in Mixture Experimental Design Applied to Wood Plastic Composite

2021 ◽  
Author(s):  
Javier Cruz-Salgado ◽  
Sergio Alonso Romero ◽  
Edgar Ruelas-Santoyo ◽  
Roxana Zaricell Bautista López ◽  
Sergio Álvarez-Rodríguez
Keyword(s):  
Experimental Design ◽  
Wood Plastic Composite ◽  
Variable Model ◽  
Plastic Composite ◽  
Slack Variable ◽  
Mixture Experimental Design

Application of Computed Tomography in Wood-Polymer Composites Density Detection

2012 ◽  
Vol 428 ◽  
pp. 57-60
Author(s):  
Yu Han ◽  
Da Wei Qi ◽  
Shu Yue Guan
Keyword(s):  
Computed Tomography ◽  
Nondestructive Testing ◽  
Testing Procedure ◽  
Wood Plastic Composite ◽  
Ct Number ◽  
Number Range ◽  
Plastic Composite ◽  
Wood Polymer ◽  
Ct Technology ◽  
Wood Polymer Composites

CT technology was used in nondestructive testing procedure of Wood-plastic composite in the paper as well as computes the CT number range of different Wood-plastic composite tomography slices in statistic method. A fitting mathematical model between CT number and Wood-plastic composite density was Calculated, because of the linear relationship exists between Wood-plastic composite density and CT number. Hence, a new method in the nondestructive testing of Wood-plastic composite density was provided.

Sustainable production and mechanical characterization of extruded wood-plastic composite made from HDPE and babassu fiber

2021 ◽  
Author(s):  
Felipe dos Anjos Rodrigues Campos ◽  
Felipe Chagas Rodrigues de Souza ◽  
Leonardo Rosa Ribeiro da Silva ◽  
Elberton Santos Castro
Keyword(s):  
Mechanical Characterization ◽  
Sustainable Production ◽  
Wood Plastic Composite ◽  
Plastic Composite

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.

Theoretical and Experimental Study on Die Pressure Prediction in Extrusion of Wood-Plastic Composite

2009 ◽  
Vol 44 (11) ◽  
pp. 1293-1304 ◽  
Author(s):  
A.H. Behravesh ◽  
E. Shakouri ◽  
A. Zolfaghari ◽  
M. Golzar
Keyword(s):  
Experimental Study ◽  
Wood Plastic Composite ◽  
Plastic Composite
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