Mohammad Shishesaz

Shahid Chamran University of Ahvaz

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Mohammad Hosseini

Hormozgan University

Hamid M. Sedighi

Shahid Chamran University of Ahvaz

Arash Reza

Islamic Azad University, Ahvaz Branch

Mojtaba Shariati

Shahid Chamran University of Ahvaz

Reza Mosalmani

Shahid Chamran University of Ahvaz

Shahram Shahrooi

Islamic Azad University, Ahvaz Branch

Amin Hadi

Yasuj University of Medical Sciences

Davood Zaarei

Islamic Azad University South Tehran Branch

Ali Hajnayeb

Shahid Chamran University of Ahvaz

Pezhman Taghipour Birgani

Islamic Azad University, Ahvaz Branch

Cooperative Institutions

Shahid Chamran University of Ahvaz

Petroleum University of Technology

Islamic Azad University, Ahvaz Branch

University of Tehran

Islamic Azad University, Tehran

Sharif University of Technology

National Iranian Oil Company (Iran)

Amirkabir University of Technology

Islamic Azad University South Tehran Branch

Shiraz University

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Vibrational analysis of graphyne-based nanoplates using a hybrid nonlocal strain gradient-atomistic simulation model

Mechanics of Advanced Materials and Structures (2024)

Abbas Moradi Afshin Ghanbarzadeh Mohammad Shishesaz Hamid M. Sedighi

Graphyne

Strain (injury)

10.1080/15376494.2024.2338916

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Citations (2)

Structure-property relationships in extruded plastics foams

Mohammad Shishesaz

Source

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Calculating the Optimum Angle of Filament-Wound Pipes in Natural Gas Transmission Pipelines Using Approximation Methods

Journal of Pressure Vessel Technology (2013)

Mohammad Reza Khoshravan Azar Ali Akbar Emami Satellou Mohammad Shishesaz Bahram Salavati

Given the increasing use of composite materials in various industries, oil and gas industry also requires that more attention should be paid to these materials. Furthermore, due to variation in choice of materials, the materials needed for the mechanical strength, resistance in critical situations such as fire, costs and other priorities of the analysis carried out on them and the most optimal for achieving certain goals, are introduced. In this study, we will try to introduce appropriate choice for use in the natural gas transmission composite pipelines. Following a 4-layered filament-wound (FW) composite pipe will consider an offer our analyses under internal pressure. The analyses’ results will be calculated for different combinations of angles 15 deg, 30 deg, 45 deg, 55 deg, 60 deg, 75 deg, and 80 deg. Finally, we will compare the calculated values and the optimal angle will be gained by using the Approximation methods. It is explained that this layering is as the symmetrical.

10.1115/1.4007189

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Citations (8)

Stress analysis in the buried polyethylene pipes with viscoelastic behavior: a finite element study

Deleted Journal (2024)

Mohammad Shishesaz Aseel Hussein Gatea Shapour Moradi Saeed Yaghoubi

In the current study, the stress distribution in the pipe with viscoelastic behavior in presence of different loading conditions has been investigated. In order to connect the polyethylene (PE) gas pipes, the electrofusion sockets are used. Since joints are one of the most sensitive regions of a structure, it is very important to investigate the local stresses created at the joints of PE pipes. To study the stress changes in the buried pipelines and sockets, the numerical simulation of the problem has been carried out in ANSYS software. To validate the obtained numerical findings, the maximum values of the axial and von Mises stresses in the pipe and socket were compared with the values obtained from previous research, and an acceptable overlap was achieved. In this research, the stress distribution in the PE pipes buried in the soil with and without sockets in presence of thermo-mechanical load has been studied, comprehensively. In the finite element modelling, the pipe and socket are made of PE80 and PE100 materials, respectively. The research results showed that the electrofusion sockets are able to be employed to connect PE gas pipes in hot climate regions. Additionally, the outcomes obtained from viscoelastic socket and pipes compared with the isotropic pipe. The findings demonstrated that the maximum von Misses stress in viscoelastic pipe and socket reduces 21% in comparison with linear elastic state.

10.1007/s42452-024-06331-0

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Coupled magneto-electro-mechanical lumped parameter model for a novel vibration-based magneto-electro-elastic energy harvesting systems

Physica E Low-dimensional Systems and Nanostructures (2017)

Meisam Moory Shirbani Mohammad Shishesaz Ali Hajnayeb Hamid M. Sedighi

Magneto

Unimorph

Mechanical energy

Resistive touchscreen

10.1016/j.physe.2017.03.022

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Citations (31)

The Effects of Shear and Peel Stress Distributions on the Behavior of Structural Adhesives in Tubular Composite Joints

Mohammad Shishesaz

This chapter is concerned with the study of peel and shear stress distributions in adhesively bonded composites under external loads. It includes the design aspects of an adhesively bonded joint including the effects of mechanical and geometric properties of the adherends, type of adhesively bonded joint, and the shapes of a few adhesively bonded joints on stress distribution in the adhesive layer of tubular joints. Furthermore, the application of torsional and axial loads on the induced stresses is examined to introduce their effects on the adhesive stresses. Additionally, the effect of local damages in terms of voids or debonds in the adhesive layer as well as delamination in the composite adherends are discussed to determine their adverse effect in terms of adhesive shear and peel stresses on the joint performance. Moreover, the use of hybrid joints is surveyed to explore the benefits of combined mechanical and bonded joints on the adhesive layer performance. In contrast to the linear analysis, the nonlinear analysis is also introduced to seek the effect of adhesive nonlinear behavior on the induced stresses, affecting the overall joint performance. Furthermore, a short survey is presented on design aspects of tubular joints to better understand the effect of geometric and mechanical properties of the adhesive layer and adherends on the overall performance of the tubular joints.

Lap joint

10.1002/9781394175604.ch5

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The effect of viscoelasticity of adhesives on shear stress distribution in a double-lap joint using analytical method

Journal of Adhesion Science and Technology (2013)

Mohammad Shishesaz Arash Reza

Abstract In this paper, the effect of viscoelasticity of polymeric adhesives on shear stress distribution in the adhesive layer of a double lap joint under shear is studied. The postulated model is composed of three single isotropic adherend layers joined by polymeric adhesives. Each adherend layer is assumed to behave as linear elastic. The results are deduced for epoxy adhesive, and hence, 3-parameters solid model is used to model the viscoelastic behavior of the adhesive layers. The derived equilibrium equations are transformed into Laplace domain and are solved using residue theorem. Results show that for a step load of P 0 = 100 N, the peak shear stress in the epoxy adhesive layer reduces to its steady value over a time span of almost 1000 s. Moreover, if the applied load is raised gradually from zero to its final value of 100 N in seconds, its rate of increase has a direct effect on the peak shear stress developed in the adhesive layers. The influence of the adhesive thickness, as well as the effect of adhesive viscosity and its shear modulus (in terms of their ratio), on shear stress distribution in the adhesive joint are also investigated. Keywords: adhesive jointdouble-lap jointspolymeric resinsviscoelasticityresidue theorem

Lap joint

Shear modulus

10.1080/01694243.2013.769085

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Citations (16)

Effects of Surface Treatment on Corrosion Resistance of 304L and 316L Stainless Steel Implants in Hank’s Solution

DOAJ (DOAJ: Directory of Open Access Journals) (2016)

Saeid Ghanavati Mohammad Shishesaz Mansoor Farzam I. Danaee

The enormous demands for metal implant have given rise to a search for cheap material with good bio-tolerability and resistance to corrosion. Although stainless steel has these properties and is widely used for this purpose, its long term application is still a concern. The corrosion resistance of stainless steel depends on the passive layer. Herein, chemical surface treatment, including passivation, electropolishing, and acid cleaning is used for improving the corrosion-resistance property of AISI 316L and 304L. Cyclic polarization, electrochemical impedance spectroscopy, and EDX analysis were used to investigate the properties obtained thereby. Finally, the corrosion resistance of the untreated and modified specimens was compared. The results show that the corrosion behavior of the passivated and electropolished specimens is improved.

10.22050/ijogst.2016.13830

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Citations (8)

Size-Effect Analysis on Vibrational Response of Functionally Graded Annular Nano-Plate Based on Nonlocal Stress-Driven Method

International Journal of Structural Stability and Dynamics (2022)

Mohammad Shishesaz Mojtaba Shariati Mohammad Hosseini

Dynamic analysis of functionally graded size-dependent annular nano-plate is the main concern in this study. To obtain the vibrational behavior of this plate, the stress-driven nonlocal integral elasticity, as well the strain gradient theory were used in conjunction with the classical plate theory. The resulting equilibrium equations were solved using the generalized differential quadrature rule (GDQR) and the influences of various parameters such as; size-effect parameter, material heterogeneity index, the aspect ratio of the inner to outer radii, and the effects of different boundary conditions were investigated on the vibrational behavior of the nano-plate, based on different types of boundary conditions. Results indicate that the natural frequencies increase with an increase in the heterogeneity index [Formula: see text] and the increase in size-effect parameter shows a similar effect in both models. Additionally, for the simply supported and free-edge boundary conditions (for both edges), as well as the free and knife-edges, and simply supported-free edges, the strain gradient theory predicts higher values of frequency ratios as [Formula: see text] was increased. Similar results were obtained for the remaining types of boundary conditions, with a higher sensitivity to [Formula: see text], provided the stress-driven model is used. This behavior can be interpreted as the sensitivity of the nano-plate to [Formula: see text] that is manifested by the use of the stress-driven model for the prediction of vibrational behavior of the nano-plate.

Plate theory

Aspect ratio (aeronautics)

Elasticity

10.1142/s0219455422500985

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Citations (19)

A New Method for Multisensor Data Fusion Based on Wavelet Transform in a Chemical Plant

DOAJ (DOAJ: Directory of Open Access Journals) (2014)

Karim Salahshoor Mohammad Ghesmat Mohammad Shishesaz

This paper presents a new multi-sensor data fusion method based on the combination of wavelet transform (WT) and extended Kalman filter (EKF). Input data are first filtered by a wavelet transform via Daubechies wavelet “db4” functions and the filtered data are then fused based on variance weights in terms of minimum mean square error. The fused data are finally treated by extended Kalman filter for the final state estimati on. The recent data are recursively utilized to apply wavelet transform and extract the variance of the updated data, which makes it suitable to be applied to both static and dynamic systems corrupte d by noisy environments. The method has suitable performance in state estimation in compari son with the other alternative algorithms. A three-tank benchmark system has been adopted to comparatively demonstrate the performance merits of the method compared to a known algorithm in terms of efficiently satisfying signal-tonoise (SNR) and minimum square error (MSE) criteria.

Benchmark (surveying)

Sensor Fusion

Stationary wavelet transform

Second-generation wavelet transform

10.22050/ijogst.2014.6622

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