Structural design and test of automobile bonnet with natural flax composite through impact damage analysis

2018 ◽  
Vol 184 ◽  
pp. 800-806 ◽  
Author(s):  
Gilsu Park ◽  
Hyunbum Park
Keyword(s):  
Structural Design ◽  
Impact Damage ◽  
Damage Analysis

Structural Design of Railway Trackbeds: Relative Effects of Various Factors

2011 ◽  
Author(s):  
J. G. Rose ◽  
M. C. Trella ◽  
N. K. Agarwal
Keyword(s):  
Finite Element ◽  
User Interface ◽  
Graphical User Interface ◽  
Structural Design ◽  
Computer Language ◽  
Damage Analysis ◽  
Relative Importance ◽  
Performance Requirements ◽  
Design Program ◽  
The Individual

Layer-elastic, finite-element computer programs are available for performance-based structural design and analysis of railway trackbeds. This paper utilizes the KENTRACK design program. It is possible to consider the fatigue lives of the various layers relative to the imposed wheel loads, tonnages, environmental conditions and other factors. The service lives of the individual components of the trackbed are predicted by damage analysis for various combinations of traffic loadings, accumulated tonnages, subgrade support, and component layer properties and thicknesses. The results are presented graphically. The latest version, KENTRACK 3.0, is utilized. It is coded in C#.NET a popular computer language for achieving accuracy and efficiency. The graphical user interface in the KENTRACK 3.0 provides a technique to analyze trackbeds as structures. It is possible with KENTRACK 3.0 to select individual trackbed layers and associated thicknesses to satisfy roadbed and trackbed performance requirements. In addition, it is possible to performance-rank different track sectional designs based on the relative importance of the particular track section and track type. The types of roadbed and trackbed configurations are selected to meet each of the various performance ranks.

KENTRACK, a Performance-Based Layered Elastic Railway Trackbed Structural Design and Analysis Procedure: A Tutorial

2010 ◽  
Author(s):  
Jerry G. Rose ◽  
Nithin K. Agarwal ◽  
Justin D. Brown ◽  
Neeharika Ilavala
Keyword(s):  
Structural Design ◽  
Computer Language ◽  
Damage Analysis ◽  
Relative Importance ◽  
Sample Design ◽  
Performance Requirements ◽  
Compressive Stresses ◽  
Design Calculations ◽  
The Individual ◽  
A Performance

KENTRACK is a layer elastic finite element based computer program that can be utilized for a performance-based structural design and analysis of railway trackbeds. Kentrack was initially developed to analyze traditional all-granular layered trackbeds and asphalt layered trackbeds. The versatility was recently expanded to analyze trackbeds containing a combination of granular and asphalt layers. The principle factor in the analysis is to limit vertical compressive stresses on the subgrade. In addition, it is possible to consider the fatigue lives of the various layers relative to the effects of wheel loads, tonnages, environmental conditions and other factors. The service lives of the individual components of the trackbed are predicted by damage analysis for various combinations of traffic, tonnages, subgrade support, component layer properties and thicknesses. The latest version, KENTRACK 3.0, is coded in C#.NET, a popular computer language for achieving accuracy and efficiency. The graphical user interface in the KENTRACK 3.0 provides a technique to analyze trackbeds as structures. It is possible with KENTRACK 3.0 to select trackbed layers and associated thicknesses to satisfy roadbed and trackbed performance requirements. In addition, it is possible to performance-rank different track sectional designs based on the relative importance of the particular track section and track type. The types of roadbed and trackbed configurations are selected to meet each of the various performance ranks. The various steps involved in the calculations are highlighted during the tutorial phase of a sample design calculations and analysis.

A Study on Impact Damage Analysis of Composite Propeller Blade of Turboprop Aircraft

2013 ◽  
Vol 577-578 ◽  
pp. 489-492
Author(s):  
Hyun Bum Park
Keyword(s):  
Structural Design ◽  
Impact Damage ◽  
Fuel Efficiency ◽  
Carbon Dioxide Emission ◽  
Design Procedure ◽  
Aerodynamic Load ◽  
Bird Strike ◽  
Propeller Blade ◽  
Element Analysis ◽  
Commercial Code

Recently, the development need of environmental and fuel efficient aircrafts has been emphasized as an eco-friendly requirement in response to high oil prices. Accordingly, it is necessary to develop the next-generation eco-friendly and high fuel efficiency engine technology to enhance the fuel efficiency and aerodynamic performance of aircrafts for the purpose of reducing carbon dioxide emission amount prior to collecting and dealing with air pollution substances being discharged. In this study, development of the turboprop propeller blade for turboprop engine including aerodynamic and structural design and analysis was performed. The proposed propeller will be used as a candidate propeller for a regional aircraft which has been developed in Korea. Because the propeller for the target aircraft must endure the high bending and twisting moment loads during the flight operation, the high stiffness and strength carbon/epoxy composite material is used as a major structure materials. As a design procedure for the present study, firstly the structural design load is estimated through the aerodynamic load case analysis, and then flanges of spars from major bending loads and the skin from shear loads are initially sized using both the netting rule and the rule of mixture. In order to investigate the structure safety and stability, the structure analysis is carried out by finite element analysis using commercial code, MSC. NASTRAN. In addition, because the propeller should be safe against the bird strike, the bird strike phenomenon is analyzed using a commercial code, ANSYS.

scholarly journals Low-speed impact damage analysis of aviation composite material structure

2021 ◽  
Vol 260 ◽  
pp. 03021
Author(s):  
Jun He ◽  
Meng Cao ◽  
Zhishu Wang ◽  
Fanglin Cong
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Composite Material ◽  
Composite Structures ◽  
Impact Damage ◽  
Low Velocity Impact ◽  
Material Structure ◽  
Damage Analysis ◽  
Low Speed ◽  
The Impact

Although the carbon fiber reinforced composite material has high specific strength and stiffness, design-versatility, anti-corrosion and other excellent features, but the impact resistance of composite structures is poor. Therefore, the composite laminates low-speed damage analysis has important significance. Based on a three-dimensional analysis theory of cumulative damage, using the commercial finite element analysis software ABAQUS to establish laminates subjected to low velocity impact finite element model. according to the numerical results and the consistency of the test results, shows that the used model of the article is reasonable and accurate, and the numerical simulation method is verified to be feasible. Finally, through the numerical simulation of process of laminated plates low speed impact damage, the damage characteristics and damage mechanism of the laminates at different times are analyzed, and the forming reasons and expanding rules of the main damage forms of fiber damage and matrix damage are revealed.

Experimental Test of Compressive Strength after Impact Damage of Natural Composite Laminate

2016 ◽  
Vol 713 ◽  
pp. 277-279
Author(s):  
Hyun Bum Park
Keyword(s):  
Compressive Strength ◽  
Structural Design ◽  
Vinyl Ester ◽  
Mechanical Performance ◽  
Impact Damage ◽  
Fiber Composite ◽  
Manufacturing Method ◽  
Transfer Molding ◽  
Natural Composite ◽  
Impact Damages

In this study, structural design and analysis of the automobile bonnet is performed. The flax/vinyl ester composite material is applied for structural design. The Vacuum Assisted Resin Transfer Molding (VARTM) manufacturing method is adopted for manufacturing the flax fiber composite bonnet. A series of flax/vinyl ester composite panels are manufactured, and several kinds of specimens cut out from the panels are tested to obtain mechanical performance data. Based on this, preliminary structural design of the automobile bonnet is performed. Finally, this study is to investigate the residual compressive strength of the flax/vinyl ester laminate due to impact damages. Through investigation on compressive strength, design allowable of flax/vinyl ester laminate is determined by the experiment to address design criteria of the composite structure.

scholarly journals Impact Damage Analysis of Aramid/Glass Hybrid Laminates.

1992 ◽  
Vol 41 (462) ◽  
pp. 382-388 ◽  
Author(s):  
Toshimitsu OHGAMI ◽  
Isao KIMPARA ◽  
Kazuro KAGEYAMA ◽  
Toshio SUZUKI ◽  
Isamu OHSAWA
Keyword(s):  
Impact Damage ◽  
Damage Analysis ◽  
Hybrid Laminates
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