Engineering

Visual Analysis Using Biplot Techniques of Rainfall Changes over Turkey
The variability in the averages of the monthly rainfall in Turkey’s seven different climate regions was examined using a principal component analysis (PCA) biplot and a canonical variate analysis (CVA) biplot to analyse meteorological data from 81 stations in the country over a period of January 1970–December 2010. Using biplots as visuals for analysing meteorological data is extremely help...


A Novel Numerical Approach for Solving Weight Function of Electromagnetic Flow Meter
A novel finite element procedure for the solution of the electromagnetic flow meter weight function is presented. The weight function represents the relative contribution of the location at flow cross section to the output signal of the flow meter. This paper treats the problem as the intuitive the approach, in which the distribution of the virtual current density is considered as the substitut...
Numerical analysis of the axial strength of CHS T-joints reinforced with external stiffeners
This study reinforced circular hollow section (CHS) T-joints with external stiffeners and analyzed the axial strength of both the unreinforced and reinforced T-joints. The SHELL181 element in ANSYS was used to establish FE models of the T-joints. A comparison between the experimental results indicated that the numerical method could be used to compute the strength for the unreinforced and reinf...


New generation of energy dissipating systems based on biaxial buckling
This work proposes a new generation of energy dissipating system based upon an original patented mechanical assembly: the Absorption par Compression–Torsion Plastique (ACTP) presented in Abdul-Latif and Baleh (2005). 1 Patent no. WO 2005090822. In fact, the ACTP transforms a uniaxial external loading into biaxial compression–torsion, where several degrees of biaxial loading paths complexi...
Practical method for calculating the buckling temperature of the web-post in a cellular steel beam in fire
Buckling behaviors of web-posts in a cellular steel beam at elevated temperatures in a fire were studied using the Finite Element Method (FEM) analysis and available analytical models. The buckling temperatures obtained by the analytical models differed greatly to those obtained from the FEM simulation. Among these analytical models, the buckling temperature obtained through the strut model bas...


An analytical method for the buckling analysis of cylindrical shells with non-axisymmetric thickness variations under external pressure
This article presents an analytical method for the buckling analysis of laterally pressured cylindrical shells with non-axisymmetric thickness variations. The previous results for thickness variations under external pressure are reviewed firstly. Then, a general analytical method that combines the perturbation method and Fourier series expansion is developed to derive buckling load formulas, wh...
Local–global mode interaction in stringer-stiffened plates
A recently developed nonlinear analytical model for axially loaded thin-walled stringer-stiffened plates based on variational principles is extended to include local buckling of the main plate. Interaction between the weakly stable global buckling mode and the strongly stable local buckling mode is highlighted. Highly unstable post-buckling behaviour and a progressively changing wavelength in t...

A new method for the structural design of flexible liners for gravity pipes of egg-shaped cross section: Theoretical considerations and formulation of the problem
The majority of gravity pipes with a non-circular cross section have an egg-shaped profile and an inner surface that can be geometrically delineated by three interconnecting circles on each side of a vertical axis of symmetry. Renovation of these pipes can be undertaken at low cost and with minimal surface disruption by installation of a close-fitting polymeric liner, most commonly by the ‘cu...
Residual ultimate strength assessment of stiffened panels with locked cracks
The residual ultimate strength of stiffened panels with locked cracks under axial compressive loading is analyzed. The influences of various geometrical characteristics of cracks and panels, such as the length and the orientation angle of cracks, are investigated by the nonlinear finite element analysis. The cracks are prevented from further propagation by holes with a diameter of 2mm drilled a...

A numerical investigation of dynamic plastic buckling behaviour of thin-walled cylindrical structures with several geometries
In this study dynamic buckling behaviors of an aluminum alloy cylindrical shell with axial linear variable thickness, discontinuity and conical shaped have been numerically investigated for high velocity impact by means of finite element method. The validation of finite element model was provided by the results of previous studies in literature. Throughout study commerce finite element package ...
Bending collapse theory of thin-walled twelve right-angle section beams
The present paper focuses on the bending collapse behavior of the twelve right-angle section (RS) beams. This paper presents the theoretical bending collapse mechanism of the RS beams around two axes based on the kinematic approach, and derives the expressions of the bending moments. The accuracy of the theoretical calculations are validated respectively by performing 36 groups finite element s...

Investigations on adhesively bonded curved CFRP panels with closed debonds subjected to compressive load
This present work aims to investigate the effect of debonds on the structural performance of adhesively bonded curved carbon fiber reinforced plastic (CFRP) panels under compressive loading environment. Representative curved panels are fabricated with a quasi-isotropic lay-up. Two types of specimens are prepared for the studies, one without debonds and the other with debonds of specified size, ...
An experimental study on externally pressurized stiffened and thickened cylindrical shells
It has long been identified that stiffening of steel shells is one of the most effective ways of enhancing the capacity of these structures. Stiffeners largely in the form of welded elements have been employed to strengthen shell structures in which the stiffeners generally cover the whole length of the structure. In this research the effect of partial and full length stiffening of shells was s...
Free vibration analysis of joined conical shells: Analytical and experimental study
Natural frequencies and mode shapes of two joined isotropic conical shells are presented in this study. The joined conical shells can be considered as the general case for joined cylindrical–conical shells, joined cylinder–plates or cone–plates, conical and cylindrical shells with stepped thicknesses and also annular plates. Governing equations are obtained using thin-walled shallow shell...
Experimental and numerical studies on a single-layer cylindrical reticulated shell with semi-rigid joints
Most existing studies on single-layer spatial structures with semi-rigid joints were focused on spherical domes. The present paper analyzed the squared plan-form single-layer structures, examining the influence of joint-rigidity on the mechanical performances of the structures. An experiment has been conducted on a 5×6m single-layer cylindrical reticulated shell with semi-rigid bolt-ball joint...