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This research investigated the effects of three different drawbead shapes under three blankholder forces on the non-symmetrical deep drawing metal workpiece. In the study, simulations were carried out on three grades of cold rolled steel sheets (i.e. SPCC, SPCD and SPCE) using the finite element method (FEM) and the actual experimentations performed for comparison. The experimental drawbead shapes...
Modal analysis is a method to describe a structure in terms of its dynamic properties such as natural frequency, damping and mode shapes. These parameters are essential in engineering design and analysis. In this work, Theoretical modal analysis of cantilever beam using Euler-Bernoulli beam theory and FEA modal analysis of cantilever beam in ANSYS Workbench, have been performed to find its natural...
Drop testing is very important in many industries. In industries, the items face severe environmental conditions during their working life. These environmental conditions can be due to high temperature, high pressure, vibration, transportation effect and it can be shock effects. Drop testing is used for shock effects. First of all, theoretical modeling was done for the drop table to check that either...
The paper deals with the changes of the modal parameters of a r.c frame building sited in Camerino, Italy. Operational modal analysis were performed before and after the seismic retrofitting of the building achieved with an innovative system that uses external steel towers equipped with dissipative devices. Before retrofitting, ambient vibration tests were carried out with the aim of evaluating the...
The finite element analysis on single plate steel frame on the different seismic waves, earthquake acceleration are conducted. The results showed that the vertex displacement and base shear increase with the earthquake acceleration increasing on the same seismic wave, hysteretic behavior of Steel frame is very good. Steel frame has a good seismic property.
The finite element analysis on steel frames-steel plate shear wall with slit on the seismic waves, EL Centro, 400cm/ are conducted. The results showed that the thickness of steel plate has a significant impact on seismic performance on the steel frame-steel plate shear wall with slit. With the thickness decreasing, the vertex displacement and base shear increase, and the size of hysteresis curves...
Cold-formed steel channel sections had been widely recognized as lightweight material and its application in construction industry seen to be unlimited because it has proven in minimizing the building cost while satisfying the required strength. This paper investigates the structural behavior of cold-formed steel channel columns (without or with stiffeners) subjected to axial thrust. Computer aided...
During the design of the second-phase extension project of a fuel electric plant in China, in order to meet the technological requirements, a typical oval steel coal scuttle with double funnels was proposed. This kind of scuttle has a complicated geometrical shape and is difficult to be designed and built. To evaluate the mechanical behavior of this scuttle, the 3D finite element structural analysis...
The sizing pressing process has been simulated using finite element method. Two typical anvil profiles in practice and three additional newly designed profiles are used in the simulation to systematically study the effect of anvil shape on the metal flow pattern. Base on the simulations of different anvils, the parametric studies of dog-bone deformation, end fish-tail profiles and width necking at...
The electromagnetic phenomena intrinsically spread over the infinite space. Thus, the efficient handling of open boundary is one of the main issues in the electromagnetic field computations. This paper deals with a FE formulation combined with infinite elements as a novel effective method for open boundary problems. Some numerical examples which demonstrate the validity of the proposed method are...
The aim of this study is to predict the torsional free vibration characteristics of single lap-jointed cantilevered hybrid clinched joints. The focus of the analysis is to reveal the influence on the natural frequencies, natural frequency ratios and mode shapes of single lap-jointed cantilevered hybrid clinched joints caused by variations in the material properties of the structural adhesives. It...
Vibration based damage identification methods examine the changes in primary modal parameters or quantities derived from modal parameters. As one method may have advantages over the other under some circumstances, a multi-criteria approach is proposed. Case studies are conducted separately on beam, plate and plate-on-beam structures. Using the numerically simulated modal data obtained through finite...
We present an inversion methodology for defect characterization using the data from magnetic flux leakage (MFL) measurements. We use a single tangential component of the leakage field as the MFL response. The inversion procedure employs the space mapping methodology. Space mapping is an efficient technique that shifts the optimization burden from a computationally expensive accurate (fine) model to...
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