scholarly journals Surface Quality of Wood Plastic Composites as Function of Water Exposure

2020 ◽  
Vol 10 (15) ◽  
pp. 5122
Author(s):  
Cagatay Tasdemir ◽  
Ibrahim Halil Basboga ◽  
Salim Hiziroglu
Keyword(s):  
Surface Quality ◽  
Juniperus Virginiana ◽  
Wood Plastic Composite ◽  
Eastern Redcedar ◽  
Average Roughness ◽  
Water Exposure ◽  
Plastic Composite ◽  
Nano Clay ◽  
Dry Conditions

The objective of this study was to evaluate the surface quality of experimentally manufactured wood plastic composite (WPC) samples exposed to water soaking. Eastern redcedar (Juniperus virginiana L.), which is one of the invasive species in Oklahoma, USA, and recycled plastic were used to manufacture WPC samples. Three types of samples, namely with 0%, 3% and 6% nano-clay were soaked in water for up to one month. Stylus-type equipment was employed to evaluate their surface roughness as a function of water exposure. Two accepted roughness parameters, average roughness (Ra) and mean peak-to-valley (Rz), were used to determine changes in the surface quality of the specimens due to water exposure. Average roughness values of 1.5 µm and 4.1 µm were determined for the samples with no clay in dry conditions and those soaked for one month in water, respectively. Corresponding values were lower in the case of those with clay in their content. Based on the findings in this work, it appears that the stylus technique can be successfully applied to such samples to quantitatively evaluate their surface quality when they are exposed to water for an extended time span. It is expected that data from this work could help to produce a better understanding of the behavior of WPCs under environmental conditions.

Effect of press force in tensile strength and surface quality of press formed wood plastic composite products

2019 ◽  
Author(s):  
Sami Matthews ◽  
Amir Toghyani ◽  
Panu Tanninen ◽  
Marko Hyvärinen ◽  
Ville Leminen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Surface Quality ◽  
Wood Plastic Composite ◽  
Plastic Composite

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.

Performance Evaluation of Bamboo Scrimber under Planner Machining

2012 ◽  
Vol 517 ◽  
pp. 101-106 ◽  
Author(s):  
Ming Jie Guan ◽  
Zhi Yong Cai ◽  
Yi Xin Zhu ◽  
Ju Mei Lin
Keyword(s):  
Surface Quality ◽  
Average Roughness ◽  
Measuring Surface ◽  
Bamboo Scrimber ◽  
Finished Surface ◽  
Main Defect ◽  
Sawtooth Oak ◽  
Grade Assessment ◽  
Scale Roughness

This research evaluated the planing performance of bamboo scrimber boards at three feed speeds and three cutting depths and used two methods to assess the finished surfaces. A macroscopic grade assessment was made according to ASTM D 1666-87 for visible planing defects. The other assessment was a microscopic scale roughness test measuring surface average roughness in terms of GB/T 12472. The visible results showed that the finished surface quality of bamboo resulted mainly in Grades and , with the main defect being torn grain. The two evaluations method showed consistent results in surface quality that the highest percentage of Grade was counted and the lowest roughness value occurred. Compared with the hardwood Sawtooth oak widely used in furniture industry in China, planning quality of bamboo scrimber board is better in terms of roughness.

In-Process Laser Re-Melting of Thin Walled Parts to Improve Surface Quality after Laser Metal Deposition

2019 ◽  
Vol 813 ◽  
pp. 191-196
Author(s):  
Francesco Bruzzo ◽  
Guendalina Catalano ◽  
Ali Gökhan Demir ◽  
Barbara Previtali
Keyword(s):  
Surface Roughness ◽  
Energy Density ◽  
Surface Quality ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Average Roughness ◽  
Thin Walls ◽  
Energy Inputs ◽  
Thin Walled

Laser metal deposition (LMD) is an additive manufacturing process highly adaptable to medium to large sized components with bulky structures as well as thin walls. Low surface quality of as-deposited LMD manufactured components with average roughness values (Ra) around 15-20μm is one of the main drawbacks that prevent the use of the part without the implementation of costly and time-consuming post-processes. In this work laser re-melting is applied right after LMD process with the use of the same equipment used for the deposition to treat AISI 316L thin walled parts. The surface quality improvement is assessed through the measurement of both areal surface roughness Sa(0.8mm) QUOTE and waviness Wa QUOTE (0.8mm) parameters. Moreover, roughness power spectrum is used to point out the presence of principal periodical components both in the as-deposited and in the re-melted surfaces. Then, the transfer function is calculated to better understand the effects of laser re-melting on the topography evolution, measuring the changes of individual components contributing to the surface roughness such as the layering technique and the presence of sintered particles. Experiments showed that while low energy density inputs are not capable to properly modify the additive surface topography, excessive energy inputs impose a strong periodical component with wavelength equal to the laser scan spacing and directionality determined by the used strategy. When a proper amount of energy density input is used, laser re-melting is capable to generate smooth isotropic topographies without visible periodical surface structures.

The Effects of Cutting Parameters on Surface Texture of Hybrid Composite CFRP/AL2024

2016 ◽  
Vol 863 ◽  
pp. 111-115 ◽  
Author(s):  
Saiful Bahri Mohamed ◽  
Wan Noor Fatihah Mohamad ◽  
Martini Muhamad ◽  
Jailani Ismail ◽  
Been Seok Yew ◽  
...  
Keyword(s):  
Surface Quality ◽  
Hybrid Composite ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Machined Surface ◽  
Machined Surface Quality ◽  
Mechanical And Physical Properties ◽  
End Mills ◽  
Dry Conditions

The use of hybrid composite materials has increased due to their special mechanical and physical properties. However, machining of these materials is extremely difficult due to non-homogeneous, anisotropic and highly abrasive characteristics. The performance of machined surface quality of CFRP/Al2024 was described using two level factorial methodology. This research aims to study the interaction effects and significant factors of cutting parameters on the surface quality and optimise the cutting parameter for the surface quality of CFRP/Al2024 1μm to 2μm. The trimming process test was performed under dry conditions using burr tools 6mm diameter of end mills. The factors investigated were spindle speed (N), feed rate (fr) and depth of cut (dc), meanwhile profile roughness parameters (Ra) of CFRP and Al2024 were the response variables. Results show that the best estimated value of fr should be 500 mm/min to 530 mm/min, N is between and 2313.870 rpm to 2336.042 rpm. For both responses, N is the most significant effect followed by fr and dc.

Study of Surface Quality and Mechanical Properties of Composite Material Based on Natural Reinforcement

2016 ◽  
Vol 821 ◽  
pp. 471-478
Author(s):  
Zuzana Hutyrová ◽  
Dušan Mitaľ ◽  
Marta Harničárová ◽  
Jozef Zajac ◽  
Jan Valíček
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Tensile Test ◽  
Surface Quality ◽  
Bending Test ◽  
Wood Plastic Composite ◽  
Radiographic Method ◽  
Plastic Composite

This paper presents problem of the examination of the inhomogeneity of composite material on the base of wood plastic composite. It deals with evaluation of mechanical properties after tensile test and triax-bending test of a composite were assessed in relation to images acquired from radiographic method – metrotomography (using radiographic method which has an explanatory value in terms of evaluation of volume defects and in a figurative sense, also of the conduct of cracks on the surface after machining).

COMPLEXITY-BASED DECODING OF THE EFFECT OF MACHINING PARAMETERS ON THE MACHINED SURFACE IN MILLING OPERATION

Fractals ◽  
2019 ◽  
Vol 27 (05) ◽  
pp. 1950076 ◽  
Author(s):  
KUSHAL BISSOONAUTH ◽  
HAMIDREZA NAMAZI
Keyword(s):  
Fractal Dimension ◽  
Surface Quality ◽  
Complex Structure ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Machined Surface ◽  
Milling Operation ◽  
Dry Conditions ◽  
Major Factors

Acquiring the desired surface quality is one of the major efforts in machining of materials. Milling operation is a widely used machining operation to shape the material in different forms. Machining parameters and conditions are two major factors that affect the surface quality of machined workpiece in milling operation. In this paper, we analyze the surface finish of machined workpiece under the variations of machining parameters and conditions (wet and dry conditions) in milling operation. For our analysis, we use fractal dimension as the indicator of complexity of structure. Based on the obtained results, in the case of wet machining condition, by increasing the depth of cut, feed rate and spindle speed in separate experiments, the fractal dimension of machined surface increases. However, the obtained results in the case of dry machining condition are not consistent with the variations of different machining parameters. The obtained results will be discussed in terms of complex structure of machined surface. The method of analysis employed in this research can be investigated with other machining operations to check how the machining parameters and conditions affect the surface quality of machined surface.

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