Uneven Wear of Vehicle Tires

1993 ◽  
Vol 21 (4) ◽  
pp. 202-219 ◽  
Author(s):  
M. H. Walters
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Techniques ◽  
Lateral Stiffness ◽  
General Increase ◽  
Element Analysis ◽  
The Past ◽  
Uneven Wear

Abstract Advances in tire construction have led to major increases in tire life over the past twenty years, mainly by increasing the lateral stiffness and thus reducing slip during cornering. However, this general increase in tire life has tended to highlight the problem of uneven wear. In the present paper, three new experimental techniques are described which have been developed to study treadwear distributions. These techniques are evaluated and their results compared with a finite element analysis. Taken together, they indicate some of the causes of uneven wear and may be used to identify tire design and service features which contribute to uneven wear.

Development of a Product Development Lab Course: Application of Theoretical, FEA and Experimental Techniques

2008 ◽  
Author(s):  
M. Khandaker ◽  
S. Ekwaro-Osire
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Product Development ◽  
Product Design ◽  
Experimental Techniques ◽  
Element Analysis ◽  
Design Problems ◽  
Laboratory Courses ◽  
Senior Design ◽  
Hands On

Finite Element Analysis (FEA) and experimental techniques based laboratory courses are used in the mechanical engineering curriculum to equip students with numerical and experimental abilities to solve design problems. Review of mechanical engineering curricula in US universities found no definite structure for the numerical and experimental based laboratory courses to support the core courses. Also, the authors found that due to lack of knowledge about the application of finite element analysis and lack of collaboration of experimental laboratories in the universities and colleges, students are unable to apply theory, numerical tool and experiment, when it comes to complete product design. To be effective product development engineers, students have to know how to use these engineering tools effectively for various mechanical systems to design a product with perfection. This motivated the authors to develop, teach, and evaluate a laboratory course before the senior design project, where students will have hands on experience with product design. The application of theoretical, numerical and experimental techniques, and their interconnectedness, will also be addressed in this new course. The main three learning objectives of this course were: (1) the ability to apply physical and mathematical models to analyze or design the mechanical systems; (2) the ability to use numerical tools (e.g., FEA) and a fundamental understanding of the limitations of such tools; and (3) the ability to correlate the theoretical knowledge with FEA and experimental findings. Some of the issues observed from the previously taught FEA laboratory related course are: (1) students do not understand how to use FEA tools in practical design problems; (2) students are unable to relate the theory with numerical and experimental result; (3) students do not understand the importance of verification of numerical results; and (4) students with knowledge of a particular analysis background have problems setting up the product design requirements dealing with different analysis systems. To overcome these difficulties, the proposed course will select design problems related to heat, fluid, vibration, and fracture and examine the overall design process including preliminary design, material selection, manufacturing, analysis, and testing. Simulating the complexity of “real world” engineering will prepare students for their senior design projects. The main benefits of this course are: (1) application of theoretical, numerical, and experimental techniques to solve a design problem, and (2) hands on experience with design problems.

Analysis on Parameters of Wood-Frame Model under Impact Loading

2013 ◽  
Vol 438-439 ◽  
pp. 779-783
Author(s):  
Cui Ling Li ◽  
Shu Ying Qu ◽  
Ruo Yang Wu ◽  
Fan Bo Meng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Cross Section ◽  
Impact Loading ◽  
Lateral Stiffness ◽  
Element Analysis ◽  
Section Shape ◽  
Wood Frame ◽  
The Impact

Deflection and stress of different cross section forms and its value are compared by finite element analysis of timberwork design model under the impact loading. The result indicates that decreasing the size of cross section or changing the section shape can effectively avoid the model too heavy and conservative design. In the case of horizontal loads applied on first floor, strengthening the column of first floor obviously reduces the deflection of model and improves the lateral stiffness. Keeping the column size of the first floor and choosing I-section significantly reduce the overall weight on condition of meeting the bearing capacity and stability, it also make the material higher utilization.

Optimal Design of a CIGS Module Grid

2011 ◽  
Vol 1315 ◽  
Author(s):  
Yiyang Li ◽  
Shihang Yang ◽  
Xieqiu Zhang ◽  
Xudong Xiao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Solar Cells ◽  
Optimal Design ◽  
Efficiency Gain ◽  
Element Analysis ◽  
The Past ◽  
Metal Grid ◽  
Top Contact

ABSTRACTSolar cells based on Cu(In, Ga)Se2 (CIGS) have made significant strides in the past decades with a record efficiency of over 20% [1]. A problem with CIGS modules is the high resistive losses along the transparent top contact. One solution is to deposit highly-conductive metal grids to collect the current. We use finite-element analysis to determine the effectiveness of the metal grid under a variety of parameters. We identify the resistance of the top contact and the width of the scribes as the most important factors in determining whether a metal grid would present a significant efficiency gain. Using the same model, we also investigate methods to optimize the design of the grid.

Research on Optimization Design of the Lateral Stiffness Satio about the Frame-Supported Multi-Ribbed Structure

2010 ◽  
Vol 152-153 ◽  
pp. 954-958
Author(s):  
Qi Zhang ◽  
Qian Feng Yao ◽  
Yin Zhang ◽  
Wei Huang ◽  
Qi Xiang Yin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Response ◽  
Theoretical Basis ◽  
Optimization Design ◽  
Earthquake Resistance ◽  
Lateral Stiffness ◽  
Element Analysis ◽  
Resistance Performance ◽  
Standard Frame

By testing 4 pin standard frame-supported multi-ribbed composite slab’s mechanical proper- ties under the horizontal load’s funtion,it is got that the earthquake resistance performance influence of lateral stiffness satio to frame-supported multi- ribbed slabs.The reasonable value scope of stiffness satio between transformation layers is obtained by finite element analysis of seismic response of frame-support- ed multi-ribbed slab structures and provides theoretical basis to engineering design

scholarly journals Rail Vehicle Cab Car Collision and Corner Post Designs According to APTA S-034 Requirements

2003 ◽  
Author(s):  
Ronald A. Mayville ◽  
Kent N. Johnson ◽  
David C. Tyrell ◽  
Richard G. Stringfellow
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformation ◽  
North American ◽  
Public Transportation ◽  
Large Deformations ◽  
Deformation Capacity ◽  
Element Analysis ◽  
Rail Vehicle ◽  
The Past

The American Public Transportation Association standard for rail passenger equipment, S-034, includes requirements for the collision and corner posts of cab cars that are consistent with new federal requirements and substantially different than what has been required in the past. This paper describes the development and evaluation of two cab car end frame designs that were generated to investigate the implications on crashworthiness and operations of the new standards. A review was undertaken of prior cab car crashworthiness research and of existing and planned cab car designs for North American operation. The two designs were then generated and both hand and finite element analysis, including analysis for large deformations, was conducted to demonstrate that the designs meet the requirements. Of particular interest is the issue of providing large deformation capacity of the posts and the implications of eliminating the stairwell to meet the strength requirements.

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