scholarly journals THE UTILIZATION OF BAMBOO WASTE AS A NEW ALTERNATIVE MATERIAL IN THE AIRCRAFT FUSELAGE INTERIOR PANEL STRUCTURE

Vortex ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Lado Rislya Prakasa
Keyword(s):  
Composite Material ◽  
Manufacturing Industry ◽  
Mechanical Test ◽  
Fiber Type ◽  
Fiber Composite ◽  
Glass Fibers ◽  
Stress And Strain ◽  
Aircraft Manufacturing ◽  
Bamboo Fibers

In the aircraft manufacturing industry, the strength and weight of the material is one of the important considerations in structural design. Composite material is a material composed of two or more forming materials, each of which has different mechanical properties. Aircraft structure in this era are 50 - 80% composed of glass or carbon fiber composite materials as reinforcement. Unfortunately, these fibers when recycled produce harmful CO gas, difficult to degrade naturally and cause itching when in contact with human skin. For this reason, environmentally friendly and strong fibers are needed to replace the role of glass or carbon fibers. Is a bamboo plant, which is abundant in Indonesia which is considered suitable as a substitute material. In this study, a mechanical test and descriptive analysis were carried out on the strength of the composite material with variations in the types of bamboo fibers apus, wulung, tutul and petung. These fibers are arranged with epoxy resin and hardener as a binding material (matrix). And each fiber will be arranged in  0 ° pattern to the matrix. Then each material with a different fiber type will be tested for tensile and bending to obtain the value of stress and strain that occurs at its maximum loading. And the result is the average tensile stress value (Mpa) composite material of apus bamboo is 75.95, wulung bamboo 49.92, petung bamboo 112.73, tutul bamboo 83.85. Then the average bending stress (Mpa) composite material of apus bamboo was 239.073, wulung bamboo 214.236, petung bamboo 249.67, tutul bamboo 272.79. With this result, bamboo fiber composites are considered to be able to replace the role of carbon or glass fibers, as an alternative composite material in some parts of the interior fuselage of aircraft panels. Keyword: Composites material, Matrix, Bamboo Fibers, Carbon and Glass Fibers, Stress and Strain.

scholarly journals Effect of silane treatment on mechanical properties and thermal behavior of bamboo fibers reinforced polypropylene composites

2020 ◽  
Vol 15 ◽  
pp. 155892502095819
Author(s):  
Qianting Wang ◽  
Yu Zhang ◽  
Weikang Liang ◽  
Jianjie Wang ◽  
Youxin Chen
Keyword(s):  
Mechanical Properties ◽  
Thermal Behavior ◽  
Functional Groups ◽  
Mechanical Test ◽  
Fiber Composite ◽  
Silane Treatment ◽  
Silane Coupling Agents ◽  
Polypropylene Composites ◽  
Bamboo Fibers ◽  
Pp Composites

In this work, the surface of the bamboo fibers (BF) was treated with three kinds of silane coupling agents terminated with amino functional groups (KH550), epoxy functional groups (KH560), and methyl functional groups (KH570) to improve fiber–matrix adhesion. The effects of silane treatment on the mechanical properties and thermal behavior of BF/polypropylene (PP) composites were investigated. Mechanical test results showed that the order of modification effectiveness was KH570 > KH550 > KH560. KH570 treated fiber composite exhibited the best mechanical properties. The tensile strength and flexural strength of 5 wt% KH570 treatment reached to 36.1 and 54.7 MPa, which were 15.4% and 23.6% higher than those of UBF/PP composites. Simultaneously, the thermal stability increased from 467.0°C (UBF) to 470.6°C (KH-570 treated BF). An increase in crystallization temperature (1.7°C) and a decrease in crystallinity (5.8%) occurred upon the addition of 5% KH570 silanes treated bamboo fibers.

The Application of Carbon Fiber Composite Material for Sports Equipment

2012 ◽  
Vol 496 ◽  
pp. 480-483 ◽  
Author(s):  
Xue Bai ◽  
Ning Li
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Advanced Stage ◽  
New Materials ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material ◽  
Fiber Composite Materials

With the development of science and technology, the requirements on the properties of new materials was increasing, the research and production of carbon fiber arriving an advanced stage. In the field of sports, carbon fiber composite material was widely used in sports equipment, this study illustrates the unique advantages of carbon fiber composite materials applied to sports apparatus, reveals the important role of carbon fiber and its composites on the modern sports development by describing the molding technology and typical examples

scholarly journals The developmental state in Brazil: comparative and historical perspectives

2015 ◽  
Vol 35 (1) ◽  
pp. 114-132 ◽  
Author(s):  
BEN ROSS SCHNEIDER
Keyword(s):  
East Asia ◽  
Manufacturing Industry ◽  
Developmental State ◽  
State Intervention ◽  
State Governments ◽  
Historical Perspectives ◽  
Developmental States ◽  
Aircraft Manufacturing ◽  
State Enterprises

The record of successful developmental states in East Asia and the partial successes of developmental states in Latin America suggest several common preconditions for effective state intervention including a Weberian bureaucracy, monitoring of implementation, reciprocity (subsidies in exchange for performance), and collaborative relations between government and business. Although Brazil failed to develop the high technology manufacturing industry and exports that have fueled sustained growth in East Asia, its developmental state had a number of important, and often neglected, successes, especially in steel, automobiles, mining, ethanol, and aircraft manufacturing. Where Brazil's developmental state was less successful was in promoting sectors like information technology and nuclear energy, as well as overall social and regional equality. In addition, some isolated initiatives by state governments were also effective in promoting particular local segments of industry and agriculture. Comparisons with East Asia, highlight the central role of state enterprises in Brazil that in effect internalized monitoring and reciprocity and bypassed collaboration between business and government (that was overall rarer in Brazil).

scholarly journals Characterization of jute and glass fiber reinforced polyester based hybrid composite In this research

2016 ◽  
Vol 51 (2) ◽  
pp. 81-88
Author(s):  
MR Hassan ◽  
MA Gafur ◽  
AA Rana ◽  
MR Qadir ◽  
SM Masum ◽  
...  
Keyword(s):  
Composite Material ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Glass Fibers ◽  
Research Work ◽  
Synthetic Fiber

In this research work an attempt is made to fabricate a hybrid composite material with hessian cloth (natural fiber) and glass fiber (synthet ic fiber) in polyester matrix using hand lay-up process and testing was performed by ASTM standards. Main objective of this research work is to investigate the effects of use of natural fiber in the composite material with the synthetic fiber. Experimental results revealed that hybridization of composite with natural and synthetic fibers shows promising tensile strength, flexural strength and hardness. Among the hybrid composites one with the composition of three layers of glass fibers and two layers of hessian cloth (jute fiber) showed highest ten sile strength and flexural strength which were found 104.63 MPa and 134.65 MPa respectively. Water absorption was high in composites having higher hessian cloth content than glass fiber. Composite with high glass fiber content showed high hardness which was 39.9 HV.Bangladesh J. Sci. Ind. Res. 51(2), 81-88, 2016

scholarly journals The Role of Internal Control in Firms’ Coping with the Impact of the COVID-19 Pandemic: Evidence from China

2021 ◽  
Vol 13 (11) ◽  
pp. 6294
Author(s):  
Peiqing Zhu ◽  
Jianbo Song
Keyword(s):  
Internal Control ◽  
Manufacturing Industry ◽  
Firm Heterogeneity ◽  
Negative Impact ◽  
Risk Prevention ◽  
High Tech ◽  
Obvious Effect ◽  
The Difference ◽  
The Impact

Internal control plays a role in risk prevention for firms when dealing with serious emergencies, which ensures the sustainable development of firms during a crisis. Based on the rapid outbreak of COVID-19 in China, this paper empirically tests whether internal control alleviates the negative impact of the pandemic on firm performance. Using a sample of Chinese listed firms from the first quarter of 2019 to the third quarter of 2020 and employing the difference-in-difference (DID) method, we find that the firms with a higher quality of internal control achieve better financial performance during the pandemic period; the more serious the pandemic is, the more obvious effect internal control plays. Furthermore, we consider the industry heterogeneity and firm heterogeneity of the risk resistance effect of internal control. In the manufacturing industry, which is a “disaster zone” of the pandemic, and the non-high-tech industry with a low degree of digitization, internal control can play a more important role in firms’ performance. Moreover, for state-owned enterprises, and firms with strong financing constraints, the role of internal control is more prominent. The above results provide empirical evidence for the risk prevention function of internal control and shed new light on the measures for firms to resist emergencies in the future.

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