Faramarz Ashenai Ghasemi
@sru.ac.ir
Mechanical Engineering
Shahid Rajaee Teacher Training University
Faramarz Ashenai Ghasemi
Born on: July 11, 1968, Tehran, Iran
PhD in Mechanical Engineering (Solids Design), Khajeh Nasir Toosi University, Tehran. Iran, 2008
MS in Mechanical Engineering (Manufacturing and Production), Tehran Polytechnic, Iran, 1995
BS in Mechanical Engineering (Solids Design), Tehran Polytechnic, Iran, 1992
Faramarz Ashenai Ghasemi is currently associate professor at the Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University (SRTTU). He works on mechanical behavior of polymer based composite materials, especially on nano ones. He has translated a number of books from English into Persian. Moreover, he has published many research papers and also several conference ones. In addition, he holds patent rights to two registered inventions. Some of his gained titles are as follow as:
Top Researcher of the SRTTU (2013, 2015, 2017)
Top Researcher of the Mechanical Engineering Faculty of the SRTTU (2012, 2014, 2016)
Translator of the Year Book of the SRTTU (2013, 2015, 2016)
Top Group Head of the SRTTU (2011, 2013)
Top Instructor of the SRTTU (2013)
Executive Manager of Top Journal of the SRTTU (2015)
EDUCATION
PhD in Mechanical Engineering (Solids Design), Khajeh Nasir Toosi University, Tehran. Iran, 2008
MS in Mechanical Engineering (Manufacturing and Production), Tehran Polytechnic, Iran, 1995
BS in Mechanical Engineering (Solids Design), Tehran Polytechnic, Iran, 1992
RESEARCH INTERESTS
Composite Materials
Polymer Based Namocomposites
Mechanical Behavior of Materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mohammad Kazem Nikzad, Farshid Aghadavoudi, and Faramarz Ashenai Ghasemi
Springer Science and Business Media LLC
Pouya Rajaee, Faramarz Ashenai Ghasemi, Seyyed Ali Sajjadi, and Mohammad Fasihi
Wiley
AbstractThe increasing application of additive manufacturing (AM) technology across various sectors has sparked significant interest in characterizing 3D‐printed components. An essential aspect of achieving fracture‐resistant designs is gaining a comprehensive understanding of the fracture behavior exhibited by these components. While most studies have focused on linear‐elastic fracture mechanics (LEFM), there is a lack of comprehensive studies on the post‐yield fracture behavior (PYFM) of 3D‐printed components. As a result, this study aims to fill this gap by investigating the impact of raster angle, a critical parameter influencing fracture properties and often leading to premature failures, on the fracture properties of fused deposition modeling (FDM) 3D printed acrylonitrile butadiene styrene (ABS) using essential work of fracture (EWF). Outcomes showed that by changing lay‐ups from [90]5 to [0]5, the value of we or elastic work increased by nearly 306%. Further, the maximum and minimum values of the plastic work (βwp) were for [45/−45/45/−45/45] and [90]5 lay‐ups, in order. By changing lay‐ups from [90]5 to [45/−45/45/−45/45], the value of βwp increased by approximately 216%. In addition, the fractured surfaces of tested samples are also analyzed to provide insights into the dominant failure mechanisms for different raster angles.
M. Nouri, F. Ashenai Ghasemi, G. R. Sherbaf, and K. R. Kashyzadeh
Springer Science and Business Media LLC
Hamid Kamalvand, Faramarz Ashenai Ghasemi, Mohammad Fasihi, and Pouya Rajaee
Wiley
AbstractThermoplastic composites are broadly used in many industries. Excellent mechanical characteristics are frequently required to achieve the appropriate properties for the applications. Therefore, the objectives of this study were (1) presenting an in‐depth analysis of the effects of styrene butadiene styrene (SBS) and halloysite nanotubes (HNTs) on the tensile and fracture properties of the thermoplastic composites based on acrylonitrile butadiene styrene (ABS), and (2) examining the relationship between the microstructure of the thermoplastic composites and their mechanical behavior. For these purposes, HNTs were utilized with four levels (0, 1, 3, and 5 wt%) and SBS was used with two levels (15 and 30 wt%). The tensile strength and modulus were reduced by adding SBS to 30 wt%; however, the elongation at break was increased by 30%. Furthermore, tensile strength and modulus, and elongation at break were improved by increasing HNTs up to 3 wt%. The results indicated the elastic work (we) and plastic work (βwp) rose by 29% and 10%, respectively, when 30 wt% of SBS was added to ABS. Furthermore, we and βwp rose by the addition of HNTs up to 3 wt%. To examine fracture mechanisms, field emission scanning electron microscope (FESEM) images of the fracture surface of the essential work of fracture (EWF) specimens were taken. Several voids are present in the compounds containing SBS, activating the plastic deformation mechanism. Based on the optimization process, the best strength, stiffness, and toughness balance was attained for the compound consisting of 15 wt% SBS and 1 wt% HNTs.Highlights The effects of HNTs and SBS on the fracture properties of polymer composites. The addition of SBS increased we, βwp, and the elongation at break. HNTs had a positive effect on the tensile strength and modulus, we, and βwp. The important mechanisms include plastic deformation and cavitation.
Milad Souri Rudabadi, Faramarz Ashenai Ghasemi, Mohammad Fasihi, and Pouya Rajaee
Elsevier BV
Pouya Rajaee, Faramarz Ashenai Ghasemi, and Mohammad Fasihi
Wiley
Seyyed Ali Sajjadi, Faramarz Ashenai Ghasemi, Mohammad Fasihi, and Pouya Rajaee
Wiley
Abuzar Fotoohi, Faramarz Ashenai Ghasemi, Mohammad Fasihi, and Pouya Rajaee
Wiley
Mohammad Mosayyebi, Faramarz Ashenai Ghasemi, and Reza Kolahchi
SAGE Publications
This paper discusses the wave propagation of a magnetorheological fluid (MRF) micro sandwich plate with magnetostrictive face sheets embedded in the Kerr foundation. The face sheets are reinforced with functionally graded carbon nanotubes (FG-CNT). It was hypothesized that the distribution of carbon nanotubes would be functionally graded along the thickness of face sheets in various patterns such as uniform distribution (UD), and three type of functionally graded (FG), that is, FG-O, FG-X, and FG-AV. The properties of the magnetostrictive layer are considered viscoelastic based on the Kelvin-Voigt model. The refined zigzag theory (RZT) is utilized to simulate displacements of the plate due to the sandwich nature of the system. The modified couple stress theory (MCST) is utilized to predict the influence of small-scale parameter. The equations of motion for the micro sandwich plate are derived by Hamilton's principle, and analytical solutions are utilized to acquire the phase speed, escape, and cut-off frequencies. After model verification, extensive analytical results are presented in detail. They demonstrated that the wave characteristics of the system are influenced by the micro sandwich plate parameters. Consequently, the dimensionless phase speed rises 66% via increasing the magnetic field magnitude from 12.5 to 17.5 G.
Sajad Mousavi Nejad Souq, Faramarz Ashenai Ghasemi, and Mir Masoud Seyyed Fakhrabadi
Springer Science and Business Media LLC
Mahdi Vahdat, Faramarz Ashenai Ghasemi, and Mohammad Mosayyebi
Informa UK Limited
Mohammad Mosayyebi, Faramarz Ashenai Ghasemi, Mohammad Aghaee, and Mahdi Vahdat
Informa UK Limited
Behnam Kakeh, Mohammad Fasihi, Faramarz Ashenai Ghasemi, and Pouya Rajaee
Wiley
Seyyed Sajad Mousavi Nejad Souq, Faramarz Ashenai Ghasemi, and Mir Masoud Seyyed Fakhrabadi
Elsevier BV
Seyyed Ali Sajjadi, Faramarz Ashenai Ghasemi, Pouya Rajaee, and Mohammad Fasihi
Elsevier BV
Pouya Rajaee, Faramarz Ashenai Ghasemi, Mohammad Fasihi, Abuzar Fotoohi, and Seyyed Ali Sajjadi
SAGE Publications
Thermoplastic elastomeric nanocomposites have a wide range of applications in the automotive, medical, electronics, and energy sectors. Good mechanical and fracture performances are typically needed to reach the desired properties for the applications. In this study, tensile and fracture properties of exfoliated graphite (EG) filled PP toughened with ethylene-vinyl acetate (EVA) are examined. Accordingly, four levels of EVA (0, 10, 20, and 30 wt.%) and EG (0, 1, 3, and 5 wt.%) are utilized. The full factorial design is employed to explain the effect of independent parameters and their interaction on responses. The essential work of fracture (EWF) methodology is also employed to investigate the fracture behavior of the blend nanocomposites. By increasing EVA, the elongation at break and non-EWF are increased by 188% and 75%, in succession. Moreover, the tensile modulus is improved up to 11% by increasing EG. The compound with 10 wt.% EVA and 1 wt.% EG has the best toughness-strength-stiffness balance based on the optimization results.
Sajjad Daneshpayeh, Faramarz Ashenai Ghasemi, Valioallah Panahizadeh, and Ismail Ghasemi
Wiley
Pouya Rajaee, Faramarz Ashenai Ghasemi, Mohammad Fasihi, Alireza Sadeghi, and Behnam Kakeh
Wiley
Alireza Sadeghi, Faramarz Ashenai Ghasemi, Mohammad Fasihi, and Pouya Rajaee
SAGE Publications
In this research, tensile and fracture behavior of polypropylene (PP) toughened with two types of thermoplastic polyolefin elastomers (TPOs) and filled with fumed silica are investigated. The TPOs are both propylene- and ethylene-based thermoplastic elastomers. Three percentages of TPO (0, 10, and 20 wt%) and four percentages of fumed silica (0, 1, 3, and 5 wt.%) are used. The addition of ethylene-based TPO to PP show higher values of modulus and tensile strength than propylene-based TPO. In contrast, propylene-based TPO show higher elongation at break which by increasing this type of TPO the elongation at break increase by 788%. The presence of fumed silica in the PP/TPOs blend improve the tensile strength and modulus but declined the elongation at break. Fracture behavior analysis of these compounds is performed by utilizing the essential work of fracture (EWF) approach. The outcomes demonstrate that both types of TPO in PP cause cavitation and fibrillar structures that increased the elastic and plastic work of fracture. Adding 10 wt.% ethylene- and propylene-based TPO to PP, the values of w e and βw p increase by 63%, 100% and 124%, 123%, respectively. Morphological observations show that fumed silica is located mainly around TPOs particles or at the PP/TPOs interfaces. The addition of fumed silica also reduce the size of the pores, which indicate a slight reduction in the amount of plastic work. However, fumed silica with low percentages increase the amount of elastic work and then reduce it. Also, the compound with 10 wt.% propylene-based thermoplastic elastomers and 1 wt.% fumed silica had the best toughness-stiffness-strength balance among the samples based on the optimization results.
Hossein Abolhassanpour, Faramarz Ashenai Ghasemi, Majid Shahgholi, and Arash Mohamadi
SAGE Publications
This article deals with the analysis of free vibration of an axially moving truncated conical shell. Based on the classical linear theory of elasticity, Donnell shell theory assumptions, Hamilton principle, and Galerkin method, the motion equations of axially moving truncated conical shells are derived. Then, the perturbation method is used to obtain the natural frequency of the system. One of the most important and controversial results in studies of axially moving structures is the velocity detection of critical points. Therefore, the effect of velocity on the creation of divergence instability is investigated. The other important goal in this study is to investigate the effect of the cone angle. As a novelty, our study found that increasing or decreasing the cone angle also affects the critical velocity of the structure in addition to changing the natural frequency, meaning that with increasing the cone angle, the instability occurs at a lower velocity. Also, the effect of other parameters such as aspect ratio and mechanical properties on the frequency and instability points is investigated.
Pouya Rajaee, Faramarz Ashenai Ghasemi, and Mohammad Fasihi
Wiley
Arash Mohamadi, Majid Shahgholi, and Faramarz Ashenai Ghasemi
Springer Science and Business Media LLC
Sajjad Daneshpayeh, Ismail Ghasemi, Faramarz Ashenai Ghasemi, and Valiollah Panahizadeh
Department of Polymer Engineering, Scientific Society of Mechanical Engineering
Hamidreza Talebi, Faramarz Ashenai Ghasemi, and Alireza Ashori
SAGE Publications
The effect of two types of nanocellulose on the mechanical properties of chitosan (CH) film was examined in terms of elongation, tensile strength, and dynamic-mechanical properties such as tan δ and storage modulus. Chitosan films were reinforced by cellulose nanocrystal (CNC) and cellulose nanofiber (CNF) with different ratios. CH/CNC and CH/CNF nanocomposite films containing 0–7 wt.% nanofibers were produced by solution casting. A comparison between CNC and CNF was made based on their nanostructures and interfacial bonding with the CH matrix. For both CNC and CNF, reinforcing effects in nanocomposite polymer films were presented. The results demonstrated that nanocomposite films can increase mechanical properties; 7 wt.% CNF and CNC had the most increasing effect on the mechanical properties, raising the tensile strength of the chitosan film by 104% and 52%, respectively. Moreover, the values of CH/CNC and CH/CNF films showed higher storage modulus compared to the pure chitosan film. CNF shows higher modulus and strength compared with CNC at the same amount of fiber because of CNFs’ percolation networks and their larger aspect ratio. Morphological studies revealed the dispersion of CNC and CNF is in the contiguous matrix of chitosan with a homogeneous distribution without agglomeration. The results also illustrated that CNC and CNF can improve the water resistance of chitosan films. The mechanical properties of composite films were acceptable to use as artificial skin and wound dressings.
Sajjad Daneshpayeh, Faramarz Ashenai Ghasemi, and Ismail Ghasemi
SAGE Publications
The mechanical properties of nanocomposites based on poly lactic acid/polyolefin elastomer (PLA/POE) were investigated. The compounds were made using an internal mixer. POE in two levels at 10–20 wt.% and nano fillers, including multi-walled carbon nanotubes (MWCNT) and graphene nano-platelets (GnPs) in 1, 2, and 3 wt.% levels, were added to the PLA. Impact and tensile tests were conducted to extract the impact and tensile properties, respectively. The dispersion quality of the fillers was also studied by using field-emission scanning electron microscopy (FESEM) images. The FESEM images demonstrated that the MWCNT at all levels were well distributed in different orientations, while the GnPs accumulated into the PLA/POE matrix. The simultaneous presence of nano fillers was dispersed with high quality in the matrix only in low loading. The tensile test results showed that by increasing the nano fillers individually and in a hybrid form in the presence of different loadings of POE, Young’s modulus and T-strength were improved, but impact strength and deformation at break were decreased. The addition of the POE to the PLA matrix significantly increased the impact strength and deformation at break by 128% and 75%, respectively, and the presence of POE reduced Young’s modulus and T-strength of the PLA matrix.