Blar i NTNU Open på forfatter "Razavi, Seyed Mohammad Javad"
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Effects of different indentation methods on fatigue life extension of cracked specimens
Razavi, Seyed Mohammad Javad; Ayatollahi, Majid reza; Amozadi, Atefeh; Berto, Filippo (Journal article; Peer reviewed, 2018)In this paper, 3 different indentation methods have been investigated for crack arresting and fatigue life enhancement of cracked components. The influence of residual stresses induced by indentation on fatigue crack growth ... -
The effects of microporosity in struts of gyroid lattice structures produced by laser powder bed fusion
Du Plessis, Anton; Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2020)Additive manufacturing by laser powder bed fusion allows the production of complex parts including lattice structures in popular metal alloys such as Ti6Al4V. Lattice structures are a class of meta-materials which hold ... -
Energy-based ductile failure predictions in cracked friction-stir welded joints
Majidi, Hamid Reza; Torabi, Ali reza; Zabihi, Majed; Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2019)This research aims to study the fracture behaviour in dissimilar aluminum alloys adjoined by friction stir welding (FSW). In this way, experimental data dealing with this topic was taken from the recent literature. In those ... -
Energy-based low cycle fatigue indicator prediction of non-load-carrying cruciform welded joints
Song, Wei; Liu, Xuesong; Berto, Filippo; Razavi, Seyed Mohammad Javad (Journal article, 2018)A new uniform analytical formulation is proposed to predict the low cycle fatigue assessment indicator of non-loading cruciform welded joints under tensile cyclic loading considering the effects of plasticity and mechanical ... -
Evaluation of hydrogen effect on the fatigue crack growth behavior of medium-Mn steels via in-situ hydrogen plasma charging in an environmental scanning electron microscope
Wan, Di; Ma, Yan; Sun, Binhan; Razavi, Seyed Mohammad Javad; Wang, Dong; Lu, Xu; Song, Wenwen (Peer reviewed; Journal article, 2021)Fatigue crack growth (FCG) tests were conducted on a medium-Mn steel annealed at two intercritical annealing temperatures, resulting in different austenite () to ferrite () phase fractions and different (meta-)stabilities. ... -
Experimental study of the simultaneous effect of nano-silica and nano-carbon black on permeability and mechanical properties of the concrete
M, Rezania; M, Panahandeh; Razavi, Seyed Mohammad Javad; Berto, Filippo (Journal article; Peer reviewed, 2019)The permeability level and resistance of the concrete cutoff wall of earth dam on the penetration of fluids are crucial factors and have an essential effect on the stability of the concrete core. In this research, the ... -
Fatigue Assessment of AZ31 Magnesium Alloy Weldments - Application of a Local Energy-Based Method
Bale, Emil Scott (Master thesis, 2018)Traditional stress-based fatigue criterions are highly dependent of geometry and loading mode and are often based on idealized geometries and loading conditions. These fatigue criteria are seldom applicable in general ... -
Fatigue assessment of semi-circular notched specimens produced by Laser Engineered Net Shaping method
Razavi, Seyed Mohammad Javad; Bordonaro, Giancarlo; Ferro, Paolo; Berto, Filippo (Journal article; Peer reviewed, 2018)As a primary failure mechanism, fatigue failure of additively manufactured metallic parts has attracted considerable attention in both aerospace and biomedical applications. According to some specific design requirements, ... -
Fatigue assessment of steel load-carrying cruciform welded joints by means of local approaches
Song, Wei; Liu, Xuesong; Razavi, Seyed Mohammad Javad (Journal article, 2018)In this paper, local approaches are employed to analyse stress distributions, local fatigue indicators of weld toe, and weld root in load‐carrying cruciform welded joints (LCWJs). An extension of previous available equations ... -
Fatigue behavior of porous Ti-6Al-4V made by laser-engineered net shaping
Razavi, Seyed Mohammad Javad; Bordonaro, Giancarlo; Ferro, Paolo; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2018)The fatigue behavior and fracture mechanisms of additively manufactured Ti-6Al-4V specimens are investigated in this study. Three sets of testing samples were fabricated for the assessment of fatigue life. The first batch ... -
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 ... -
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 ... -
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 ...