A. Jaderi

Publications

1 Effect of Spray Stand-off on Elasticity Modulus of Thermally Sprayed Coatings

Authors: M.Jalali Azizpour, S.Norouzi, D.Sajedipour, H.Mohammadi majd, M.M.Rabieh, A. Jaderi

Abstract:

The mechanical and tribological properties in WC-Co coatings are strongly affected by hardness and elasticity specifications. The results revealed the effect of spraying distance on microhardness and elasticity modulus of coatings. The metallurgical studies have been made on coated samples using optical microscopy, scanning electron microscopy (SEM).

Keywords: elasticity modulus, HVOF, thermal spray, WC-Co, Micro-indentation

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Abstracts

2 Study the Effect of Friction on Barreling Behavior during Upsetting Process Using Anand Model

Authors: A. Jaderi, M. Jalali Azizpour, H. Mohammadi majd, V. Tavaf

Abstract:

In upsetting processes contact friction significantly influence metal flow, stress-strain state and process parameters. Furthermore, tribological conditions influence workpiece deformation and its dimensional precision. A viscoplastic constitutive law, the Anand model, was applied to represent the inelastic deformation behavior in upsetting process. This paper presents research results of the influence of contact friction coefficient on a workpiece deformation in upsetting process.finite element parameters. This technique was tested for three different specimens simulations of the upsetting and the corresponding material and can be successfully employed to predict the deformation of the upsetting process.

Keywords: friction, upsetting, barreling, Anand model

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1 Numerical Simulation of the Remaining Life of Ramshir Bridge over the Karoon River

Authors: A. Jaderi, M. Jalali Azizpour, H. Mohammadi majd, V.Tavvaf, E. Akhlaghi, A. Shirani, S. M. Moravvej, M. Kazemi, A. R. Aboudi Asl

Abstract:

The static and corrosion behavior of the bridge using for pipelines in the south of country have been evaluated. The bridge was constructed more than 40 years ago on the Karoon River. Mentioned bridge is located in Khuzestan province and at a distance of 15 km east from the suburbs of Ahwaz. In order to determine the mechanical properties, the experimental tools such as measuring the thickness and static simulations based on the actual load were used. In addition, the metallurgical studies were used to achieve a rate of corrosion of pipes in the river and in the river bed. The aim of this project is to determine the remaining life of the bridge using mechanical and metallurgical studies.

Keywords: Corrosion, Bridge, stress, FEM

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