Blar i NTNU Open på forfatter "Razavi, Seyed Mohammad Javad"
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Fatigue performance of shelled additively manufactured parts subjected to hot isostatic pressing
Du Plessis, Anton; Razavi, Seyed Mohammad Javad; Wan, Di; Berto, Filippo; Imdaadulah, Adam; Beamer, Chad; Shipley, James; MacDonald, Eric (Journal article; Peer reviewed, 2022)Additive manufacturing (AM) of metal components is increasingly used in high performance applications, especially in the aerospace industry. Laser powder bed fusion (L-PBF) of metals is the most widely used and mature ... -
Fatigue strength of blunt V-notched specimens produced by selective laser melting of Ti-6Al-4V
Razavi, Seyed Mohammad Javad; Ferro, P; Berto, Filippo; Torgersen, Jan (Journal article, 2018)Selective Laser Melting (SLM) process is an Additive Manufacturing (AM) technique that allows producing metallic parts of any kind of geometry with densities greater than 99.5%. Complex shapes lead however to notches with ... -
Fatigueless structures inspired by Nature: a case study
Berto, Filippo; Razavi, Seyed Mohammad Javad (Peer reviewed; Journal article, 2019)Biomimetic has begun to offer significant potential in providing unique solutions in materials science. However, the full potential of mimicking natural systems can be fully exploited only if we start to look the problem ... -
Flexural behavior of metallic fiber-reinforced adhesively bonded single lap joints
Esmaeili, Emad; Razavi, Seyed Mohammad Javad; Bayat, Mohammad; Berto, Filippo (Journal article; Peer reviewed, 2018)Incorporation of additives into the adhesive layer in adhesively bonded joints can improve the stress distriution in the adhesive layer and increase adhesive toughness. In this paper, the geometric and material parameters ... -
Fracture assessment of polyacrylonitrile nanofiber-reinforced epoxy adhesive
Razavi, Seyed Mohammad Javad; R, EsmaeelyNeisiany; MR, Ayatollahi; S, Ramakrishna; S, NouriKhorasani; Berto, Filippo (Journal article, 2018)Electrospun polyacrylonitrile (PAN) nanofibers were incorporated in an epoxy-based adhesive layer to improve the adhesive joint’s mechanical performance. The morphological study of the electrospun PAN nanofibers revealed ... -
Fracture assessment of U-notched graphite specimens by means of cohesive zone model
Razavi, Seyed Mohammad Javad; Majidi, Hamid reza; Berto, Filippo; Ayatollahi, Majid reza (Peer reviewed; Journal article, 2020)Various types of graphite have gained interest in many industrial applications due to their high strength and excellent heat tolerance. However, due to the brittle nature of this material, presence of stress concentrators ... -
Fracture assessment of U-notched PMMA under mixed mode I/II loading conditions by means of local approaches.
Foti, Pietro; Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2021)The paper investigates the fracture behaviour of U-notched specimens made of polymethylmethacrylate at room temperature under mixed mode loading conditions. The specimens are flat and double notched. The notches bisectors ... -
Geometry effect on fracture behavior of V-notched specimens
Razavi, Seyed Mohammad Javad; Ayatollahi, Majid reza; Shahmohammadi, M; Berto, Filippo (Peer reviewed; Journal article, 2020)Geometric constraint is one of the important issues that affect the fracture behavior of different notched components. Specimens with the same notch geometry can have different fracture strengths due to the geometric ... -
Low-cycle fatigue behavior of 10CrNi3MoV high strength steel and its undermatched welds
Song, Wei; Liu, Xuesong; Berto, Filippo; Razavi, Seyed Mohammad Javad (Journal article; Peer reviewed, 2018)The use of high strength steel allows the design of lighter, more slender and simpler structures due to high strength and favorable ductility. Nevertheless, the increase of yield strength does not guarantee the corresponding ... -
Low-cycle fatigue behaviour of AISI 18Ni300 maraging steel produced by selective laser melting
Branco, Ricardo; Costa, J.D.M.; Berto, Filippo; Razavi, Seyed Mohammad Javad; Ferreira, J.A.M.; Capela, C.; Santos, L.; Antunes, F. (Journal article; Peer reviewed, 2018)Selective laser melting has received a great deal of attention in recent years. Nevertheless, research has been mainly focused on the technical issues and their relationship with the final microstructure and monotonic ... -
Mechanical behavior of metallic fiber-reinforced adhesive under dynamic loading
Razavi, Seyed Mohammad Javad; Bale, Emil Scott; Berto, Filippo; Bertolin, Chiara (Peer reviewed; Journal article, 2020)The mechanical behavior of metallic fiber reinforced adhesively bonded Single Lap Joints (SLJ) under dynamic loading has been studied. The effect of different fiber spacing along the joint width on the strength of SLJs was ... -
Microstructure and texture evolution during the manufacturing of in situ TiC-NiCr cermet through selective laser melting process
Aramian, Atefeh; Sadeghian, Zohreh; Wan, Di; Holovenko, Yaroslav; Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2021)The effects of different selective laser melting (SLM) scan speeds (150 mm.s−1, 95 mm.s−1, 60 mm.s−1, 55 mm.s−1, and 50 mm.s−1) on the microstructure and texture evolution of in situ TiC-NiCr cermet were investigated in ... -
Multiaxial fatigue life assessment in notched components based on the effective strain energy density
Branco, R; Costa, J.D.; Borrego, L.P.; Berto, Filippo; Razavi, Seyed Mohammad Javad; Macek, W (Peer reviewed; Journal article, 2020)This paper presents a methodology to predict the fatigue lifetime in notched geometries subjected to multiaxial loading based on the effective strain energy density concept. The modus operandi consists of defining a fatigue ... -
A new fixture for fracture tests under mixed mode I/II/III loading
Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2019)In this paper, a new loading device for general mixed mode I/II/III fracture tests is designed and recommended. Finite element analyses are conducted on the proposed apparatus to evaluate the fracture parameters of the ... -
Numerical Evaluation of T-stress under Mixed Mode Loading Through the Use of Coarse Meshes
Acanfora, M; Gallo, Pasquale; Razavi, Seyed Mohammad Javad; Ayatollahi, Majid reza; Berto, Filippo (Journal article; Peer reviewed, 2018)The present paper investigates the employment of coarse meshes in evaluating the T-stress with the displacement method. Several finite element analyses have been carried out with different mesh refinements and accuracies. ... -
On the application of the volume free strain energy density method to blunt V-notches under mixed mode condition
Foti, Pietro; Razavi, Seyed Mohammad Javad; Ayatollahi, M; Marsavina, L; Berto, Filippo (Peer reviewed; Journal article, 2020)This work investigates the possibility to apply the strain energy density method, as regards blunt V-notches under mixed loading condition, through finite element models with a free mesh pattern. It is worth underlining ... -
Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology
Ganesan, V; Shanmugam, Vigneshwaran; Kaliyamoorthy, B; Sanjeevi, S; Shanmugam, SK; Alagumalai, V; Krishnamoorthy, Y; Försth, Michael; Sas, Gabriel; Razavi, Seyed Mohammad Javad; Das, Oisik (Journal article; Peer reviewed, 2021)Natural fibre-based composites are replacing traditional materials in a wide range of structural applications that are used in different environments. Natural fibres suffer from thermal shocks, which affects the use of ... -
Parametric study of adhesive joints with non-flat sinusoid interfaces
Razavi, Seyed Mohammad Javad; Berto, Filippo; Peron, Mirco; Torgersen, Jan (Journal article, 2018)The role of sinusoid interface shape on the stress distribution and load bearing capacity of the adhesively bonded single lap joints has been investigated numerically and experimentally. The experimental results showed ... -
Porosity effect on tensile behavior of Ti-6Al-4V specimens produced by laser engineered net shaping technology
Razavi, Seyed Mohammad Javad; Bordonaro, GG; Ferro, Paolo; Torgersen, Jan; Berto, Filippo (Journal article, 2018)Microstructural characteristics of additively manufactured Ti-6Al-4V specimens are analyzed in this study. Laser Engineered Net Shaping technology, a direct energy deposition additive manufacturing process, is used to ... -
Porosity Inducing Process Parameters in Selective Laser Melted AlSi10Mg Aluminium Alloy
Ferro, Paolo; Meneghello, Roberto; Razavi, Seyed Mohammad Javad; Berto, Filippo; Savio, G. (Peer reviewed; Journal article, 2020)Additive manufacturing techniques are known for the unrivalled geometric freedom they offer to designers. It is one of the mainstays of “metal 3D-printing”, compared to casting, which, in contrast, implies more restrictions ...