scholarly journals A Design of Bamboo Plywood Pressing Machine

2020 ◽  
Vol 3 (SI1) ◽  
pp. First
Author(s):  
Le Khanh Dien ◽  
Tran Van Hung ◽  
Hoang Duc Lien ◽  
Svetlin Antonov
Keyword(s):  
Flat Plate ◽  
Environmental Benefits ◽  
Customer Requirements ◽  
Official Statistic ◽  
Technical Requirements ◽  
A Value ◽  
Hardwood Trees ◽  
Wood Flooring ◽  
Almost All ◽  
Collaboration Project

Bamboo is very popular in the countryside of almost all Southeast countries, particularly in Vietnam. Its ability can replace some kinds of wood in decoration and household goods. Bamboo grows up rapidly and can be harvested within 3 to 5 years of planting; in the meanwhile, the harvesting time of other hardwood trees must be from 8 to 10 years or longer. The inherent characteristics of bamboo are lighter than other wood materials and have a value in social and environmental benefits. Its advances in manufacturing technology have created high-value products such as bamboo flooring and bamboo furniture that can substitute for wood flooring and wood furniture. Bamboo plywood presses play an important role in the production of bamboo plywood in the industry. The machine has the function of pressing bamboo powder, and binder has been mixed from the front to the bamboo plank to meet the technical requirements. This article presents a design of bamboo plywood pressing machine that combines the heating function for the blocking board and keeps that temperature during the pressing process to create a suitable size bamboo plywood according to customer requirements. The simulation results show that the complete bamboo plywood-pressing machine is appropriate and authentic to the initial design. The result of the design was applied to manufacture the machine in DCSELAB workshop via a collaboration project between Langtre PhuAn company and the DCSELAB. The system is installed a resistance flat plate capacity of 1KW, and 2 resistors flat plate with the capacity of 0.8KW. The first manufactured machine is now in the initial working session in Langtre Villige, Binh Duong province. The initial experimental products were accepted by the partner company, and we have recommended some measures to ameliorate time by time the quality as well as the productivity of the machine. There is really not yet an official statistic on the comparison with the products of a similar machine, and we are attending the response of the customers.

A research on the design a bamboo powder drying machine

2020 ◽  
Vol 3 (SI1) ◽  
pp. First
Author(s):  
Tran Van Hung ◽  
Le Khanh Dien ◽  
Vo Tuyen
Keyword(s):  
Environmental Benefits ◽  
Small Scale ◽  
Scale Production ◽  
Technical Requirements ◽  
A Value ◽  
Hardwood Trees ◽  
Wood Flooring ◽  
Natural Wood ◽  
Bamboo Powder ◽  
Almost All

Bamboo is a sustainable and environmentally friendly material that has the potential to improve the global decline of natural resources. Bamboo is very popular in the countryside of almost all Southeast countries, particularly in Vietnam. Its ability can replace some kinds of wood in decoration and household goods. Bamboo grows up rapidly and can be harvested within 3 to 5 years of planting, in the meanwhile, the harvesting time of other hardwood trees must be from 8 to 10 years or longer. The inherent characteristics of bamboo are lighter than other wood materials and have a value in social and environmental benefits. Its advances in manufacturing technology have created high-value products such as bamboo flooring and bamboo furniture that can substitute for wood flooring and wood furniture. According to the biology studies, the bamboo has the characteristics that can replace the natural wood, but the direction of development from the stage of cultivation to the stage of finished products has not been exploited thoroughly. The production of bamboo plywood will become a great potential for the bamboo plywood industry in Vietnam. Generally, the fabrication of bamboo plywood depends on the following processes such as cutting, grinding to powder or pulp, drying, and pressing processes. In cutting and grinding processes, the trivial remains of bamboo after use, shoots… can be chopped and ground to a powder that is dried and pressed into bamboo plywood by a specialized machine similar to the production of artificial wood particleboard (PB). Bamboo powder drying machine plays a very important role in the production process of bamboo plywood. The function of the machine is drying bamboo powder to get the technical required appropriate moisture before pressing it into the standard bamboo boards. This article presents a design of bamboo powder drying machine with simple structure, long life, medium productivity, and price suitable for medium and small scale production of the Vietnam market. The first bamboo powder drying machine that was manufactured in DCSElab and its products is considered to respond to the technical requirements of customers.

scholarly journals A study on the design of bamboo grinding machine

2020 ◽  
Vol 3 (SI1) ◽  
pp. First
Author(s):  
Nguyen Hoang Hiep ◽  
Vo Tuyen ◽  
Le Khanh Dien ◽  
Nguyen Tan Hung
Keyword(s):  
Environmental Benefits ◽  
Technical Requirements ◽  
Plywood Industry ◽  
A Value ◽  
Design Computing ◽  
Hardwood Trees ◽  
Wood Flooring ◽  
Cad Cam ◽  
Natural Wood ◽  
Grinding Machine

Bamboo is a sustainable and environmentally friendly material that has the potential to improve the global decline of natural resources. Bamboo is one of the popular flora in Southeast Asia; it is also traditional plants that grow abundantly in Vietnamese villages from north to south. Its ability can replace some kinds of wood in decoration and household goods. Bamboo grows up rapidly and can be harvested within 3 to 5 years of planting, in the meanwhile, the harvesting time of other hardwood trees must be from 8 to 10 years or longer. The inherent characteristics of bamboo are lighter than other wood materials and have a value in social and environmental benefits. Its advances in manufacturing technology have created high-value products such as bamboo flooring and bamboo furniture that can substitute for wood flooring and wood furniture. According to the biology studies, the bamboo has the characteristics that can replace the natural wood, but the direction of development from the stage of cultivation to the stage of finished products has not been exploited thoroughly. The production of bamboo plywood will become a great potential for the bamboo plywood industry in Vietnam. Generally, the fabrication of bamboo plywood depends on the following processes such as cutting, grinding to powder or pulp, drying, and pressing processes. In cutting and grinding processes, the trivial remains of bamboo after use, shoots… can be chopped and ground to a powder that is dried and pressed into bamboo plywood by a specialized machine similar to the production of artificial wood particleboard (PB). The aim of this paper is a representation of a design, computing the structure of a version of a bamboo grinding machine that is sustainable, responds to technical requirements, and protection of the environment. The result of the design was applied for manufacture a typical bamboo machine in the CAD-CAM workshop of DCSELAB in the framework of a project between DCSELAB and PhuAn Village Corporation that has evaluated with satisfaction the real proof of the design. The machine has been in the session of initial testing and exploitation.

Effect of Flaw Dimensions on Ductile Fracture Behavior of Non-Aligned Multiple Flaws in a Plate

2011 ◽  
Author(s):  
Katsumasa Miyazaki ◽  
Kunio Hasegawa ◽  
Koichi Saito
Keyword(s):  
Ductile Fracture ◽  
Flat Plate ◽  
Fracture Behavior ◽  
Maximum Load ◽  
Surface Flaws ◽  
Fracture Tests ◽  
The Difference ◽  
Almost All ◽  
Maximum Minimum

The fitness-for-service codes require the characterization of non-aligned multiple flaws for flaw evaluation, which is performed using a flaw proximity rule. Worldwide, almost all such codes provide their own proximity rule, often with unclear technical bases of the application of proximity rule to ductile or fully plastic fracture. In particular, the effect of flaw dimensions of multiple surface flaws on fully plastic fracture of non-aligned multiple flaws had not been clear. To clarify the effect of the difference of part through-wall and through-wall flaws on the behavior of fully plastic fracture, the fracture tests of flat plate specimens with non-aligned multiple part through-wall flaws were conducted. When the flaw depth a was shallow with 0.4 in ratio of a to thickness t, the maximum load Pmax occurred at penetration of multiple flaws and the effect of vertical distance of non-aligned multiple flaws H on Pmax was not so significant. However, when flaw depth was deep with 0.8 in a/t, Pmax occurred after penetration of flaws and the effect of H on Pmax could be seen clearly. It was judged that the through-wall flaw tests were appropriate for discussion of the effect of H on Pmax and the alignment rule of multiple flaws. In addition, in order to clarify the appropriate length parameter to estimate Pmax of test specimens with dissimilar non-aligned through-wall multiple flaws, the fracture tests of plate specimens were also conducted. The effect of different flaw length on Pmax was discussed with maximum, minimum and averages of dissimilar non-aligned multiple flaw lengths. Experimental results showed that the maximum length lmax would be an appropriate length parameter to estimate Pmax, when the non-aligned multiple through-wall flaws were dissimilar.

scholarly journals HIGHER EDUCATION AND THE GROWTH OF MENIAL JOBS

2016 ◽  
Vol 70 (1) ◽  
pp. 8-20
Author(s):  
Łukasz Albański
Keyword(s):  
Higher Education ◽  
Young People ◽  
Liberal Arts ◽  
Youth Unemployment ◽  
Post Secondary ◽  
Technical Requirements ◽  
Iron Cage ◽  
Graduate Unemployment ◽  
Almost All ◽  
University Degree

Young people are confronting a world in which they may not achieve economic strides their parents did. Almost all will have been awarded university degree, worth far less (in the terms and conditions of their employment) than that of their parents, if they themselves graduated from university. In the article the author discusses the relationship between higher education and stratification. The concepts of meritocracy and credentialism are considered and a particular attention is paid to an equal/unequal access to education dilemma. Discussed is why a liberal arts education is losing ground and why it is being made a scapegoat for graduate unemployment. Does the nightmare of Weber’s “iron cage of rationalization” come true and is the contemporary university in the service of an economic order with all the related technical requirements of machine production? In the second part of the article the role of meritocratic discourse and educational credential inflation is considered as well as the growth of menial jobs for young people as a case in Poland. Key words: education at post-secondary level, liberal arts, youth unemployment, inequality, Poland.

scholarly journals Multi-Criteria Decision Making for Sustainability and Value Assessment in Early PSS Design

2019 ◽  
Vol 11 (7) ◽  
pp. 1952 ◽  
Author(s):  
Marco Bertoni
Keyword(s):  
Decision Making ◽  
Environmental Benefits ◽  
Business Strategies ◽  
Multi Criteria Decision Making ◽  
Value Assessment ◽  
A Value ◽  
Key Innovation ◽  
Trade Offs ◽  
Product Service ◽  
Multiple Case

Sustainability is increasingly recognized as a key innovation capability in the organization. However, it is not always evident for manufacturers how sustainability targets shall be “mixed and matched” with more traditional objectives—such as quality, time, cost, and performances—when designing and developing solutions. The emergence of “servitization” and product-service systems (PSS) further emphasizes the need for making thoughtful trade-offs between technical aspects, business strategies, and environmental benefits of a design. The objective of this paper is to investigate how multi-criteria decision making (MCDM) models shall be applied to down-select PSS concepts from a value perspective, by considering sustainability as one of the attributes of a design contributing to the overall value of a solution. Emerging from the findings of a multiple case study in the aerospace and construction sector, the paper presents a five-step iterative process to support decision making for sustainable PSS design, which was further applied to design an electrical load carrier. The findings show that the proposed approach creates a “hub” where argumentations related to “value” and “sustainability” of PSS solution concepts can be systematically captured in a way that supports the discussion on the appropriate quantification strategy.

Numerical Simulation of Localized Bulging in an Inflated Hyperelastic Tube with Fixed Ends

2020 ◽  
pp. 2050118
Author(s):  
Zehui Lin ◽  
Linan Li ◽  
Yang Ye
Keyword(s):  
Axial Stress ◽  
Necessary Condition ◽  
Theoretical Studies ◽  
Inflation Pressure ◽  
Material Models ◽  
Rubber Material ◽  
Bifurcation Phenomenon ◽  
A Value ◽  
Pressure Maximum ◽  
Almost All

When a hyperelastic tube is inflated, the inflation pressure has a maximum for almost all rubber material models, but has no maximum for commonly used arterial models. It is generally believed that the pressure having a maximum is a necessary condition for localized bulging to occur, and therefore aneurysms cannot be modeled as a mechanical bifurcation phenomenon. However, recent theoretical studies have shown that if the axial stretch is fixed during inflation, localized bulging may still occur even if a pressure maximum does not exist in uniform inflation. In this paper, numerical simulations are conducted to confirm this theoretical prediction. It is also demonstrated that if the axial pre-stretch is not sufficiently large, unloading near the two ends can reduce the axial stress to a value close to zero and Euler-type buckling then occurs.

GPS in Agriculture – A Growing Market!

1999 ◽  
Vol 52 (1) ◽  
pp. 60-69 ◽  
Author(s):  
J. V. Stafford
Keyword(s):  
Case Studies ◽  
Precision Agriculture ◽  
Environmental Benefits ◽  
Positioning System ◽  
Large Market ◽  
Technical Requirements

This paper, and the paper which follows it, were first presented at the IBC '98 Conference ‘Space-Based Navigation Industry’, which was held in London, 11–12 June 1998.In conventional arable agriculture, position within the field was usually irrelevant! However, the advent of precision agriculture, wherein inputs are targeted according to locally-determined requirements within the field, has opened up a potentially large market for GPS. Indeed, it was the availability of GPS which permitted the development and implementation of precision agriculture – a concept which holds the promise of significant economic and environmental benefits to the farmer. This paper indicates the technical requirements for GPS and presents three case studies where a positioning system is required.

Plastic flow and fracture of glass

1964 ◽  
Vol 282 (1388) ◽  
pp. 33-43 ◽  
Keyword(s):  
Plastic Flow ◽  
Energy Balance Equation ◽  
Static Fatigue ◽  
Secondary Effects ◽  
New Approach ◽  
Theoretical Support ◽  
A Value ◽  
Fracture Theory ◽  
As Stress ◽  
Almost All

It is usual to regard glass as a purely brittle solid and this has been taken for granted in almost all past papers on the mechanical strength, static fatigue, and ageing properties of glasses. However, in the present note this approach is rejected as being incompatible with experimental evidence of plastic flow in glass, and incapable of explaining the strengths observed. Instead a completely new approach is attempted in which glass is treated as an elastic-plastic solid and a complete theory of glass flow and strength is developed. The note summarizes the contents of three papers soon to be published which develop these ideas in more detail, and readers are referred to these three papers (Marsh 1964 a , b , c ) for full experimental and theoretical support of the ideas presented here. In brittle fracture theory glass is expected to exhibit its theoretical cohesive strength if it is flaw-free (e. g. untouched glass fibre), but if handled surface cracks are introduced and the strength should fall to a value predicted either by the Griffith (1920) energy balance equation or by the known stress concentration factor at the crack tip. Secondary effects such as static fatigue and ageing can then be explained as stress corrosion phenomena.

scholarly journals Implementation of natural and artificial materials in Portland cement

2020 ◽  
Vol 74 (3) ◽  
pp. 147-161
Author(s):  
Pero Dabic ◽  
Damir Barbir
Keyword(s):  
Portland Cement ◽  
Cementitious Materials ◽  
Environmental Benefits ◽  
Supplementary Cementitious Materials ◽  
Hardened Concrete ◽  
Cement Composites ◽  
Artificial Materials ◽  
Waste Container ◽  
Almost All ◽  
The Impact

For the preparation of modern cement and concrete, supplementary cementitious materials (SCM) have become essential ingredients. The technical, economic and environmental advantages of using SCM have become unquestionable. The main technical reasons for their use are the improvement of the workability of fresh concrete and durability of hardened concrete. Actually, SCM affect almost all concrete properties, while environmental and economic reasons may be more significant than technical reasons. These ingredients can reduce the amount of Portland cement used in cement composites, resulting in economic and environmental benefits. In addition, many of the SCM are industrial by-products, which can otherwise be considered as waste. This paper presents a literature review of the present knowledge on the impact of natural zeolite, waste construction brick and waste container glass on physical, chemical and mechanical properties of Portland cement as the most commonly used cement in the world.

scholarly journals Recycling of Rolling Stocks

2016 ◽  
Author(s):  
Rafael Favoretto Silva ◽  
Sakdirat Kaewunruen
Keyword(s):  
End Of Life ◽  
Environmental Benefits ◽  
Rolling Stock ◽  
The Public ◽  
Sustainable Procurement ◽  
Rail Vehicles ◽  
Management Procedures ◽  
Materials Used ◽  
Almost All ◽  
Modern Rolling

This review paper highlights feasible and practicable approaches for managing end-of-life rolling stocks. It aims to promote and enable sustainable procurement policy for rolling stocks. Firstly, it demonstrates that modern rolling stocks can potentially gain the environmental benefits since almost all of their materials used in the rolling stock manufacturing can be recycled and reused. In this study, brief definition and concept of various train types are introduced and discussed, accompanied by some demonstrative illustrations. Then, component analyses, recovery rates and percent proportion of each material in various rolling stock assemblies have been evaluated. The estimation of material quantities that can potentially be recycled has been carried out using industry data sources. The suitable management procedures for end-of-life rail vehicles are then discussed, together with the life cycle of the key materials in which the recyclability criteria take into account the environmental risks and the best and safest approaches to deal with them. The aim of this study is to increase the awareness of the public, train manufacturers and rail industries on the benefits to the environments from rolling stock recycling, which could result in sustainable society and urban livings.

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