Cyclic Bending Failure of Local Sharp-Notched Circular Tubes with Different Diameter-to-Thickness Ratios
Journal Title: International Journal of Engineering Innovations and Research - Year 2018, Vol 7, Issue 3
Abstract
In this study, the failure of local sharp-notched 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending are studied. Different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The notch depths of tubes were considered from very small to about 0.6 times the tube’s wall thickness. From the experimental moment-curvature relationship, it demonstrated a steady loop from the beginning of the first bending cycle. From the experimental ovalization-curvature relationship, it exhibited an increasing and ratcheting manner along with the number of bending cycles. The larger notch depth led to more asymmetrical ovalization-curvature relationship and the greater increase of the ovalization. Furthermore, for a certain diameter-to-thickness ratio, five unparallel straight lines corresponding to five different notch depths were found for the controlled curvature-number of cycles required to ignite failure relationship on a log-log scale. Finally, a theoretical model was proposed for simulating the aforementioned relationship. Through comparison with the experimental data, the model can properly simulate the experimental findings.
Authors and Affiliations
Kuo-Long Lee, et al.
Keywords
Related Articles
- EP ID EP497915
- DOI -
- Views 98
- Downloads 0
Dependence of Ultimate Bending Moment of Box Girders on Panel’s Slenderness
The structural behavior of box-girders under pure bending moment is analyzed and discussed on the basis of the results of experiments performed by the author. The box girders are geometrically similar but made of differe...
Bond Quality, Mechanical and Physical Properties of Wood - Polyethylene Reinforced Plywood
An experimental study has been carried out to investigate the quality of adhesion, mechanical and physical properties of plywood produced from bonding Eucalyptus wood veneers with polyethylene (LDPE) sheet as a reinforec...
Experimental Measurement of Flow Field using Three Dimensional Visualization Method
Cavitation and coalescence of bubbles are transient in characters and inevitable in Hydropower stations operated with Francis turbines. However, there are challenges in measurement of these phenomena. In this research me...
An Approach for Engineering Tuning of PID-Controller with Dynamic Object from Second Order
An approach is proposed for engineering adjustment of the PID-controller with a dynamic second order object. There is a proposal to solve the problem by solving the characteristic equation. As a result of the t...
Experimental Setup in Study for HCCI Engine Vibration using I-kazTM Method and using Palm Oil Biodiesel Blended with RON 97 as Fuel
This paper presents work conducted at the Universiti Kebangsaan Malaysia to support of the HCCI Engine Program. The objective of this paper is to develop an engine that employs Homogeneous Charge Co...