Browsing NTNU Open by Author "Razavi, Seyed Mohammed Javad"
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40CrMoV13.9 notched specimens under multiaxial fatigue: An overview of recent results
Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo; Welo, Torgeir (Journal article; Peer reviewed, 2017)The multiaxial fatigue strength of circumferentially V-notched and semicircular notched specimens made of 40CrMoV13.9 has been investigated in this paper. The multiaxial load were applied using combined tension and torsion ... -
Creep behavior of v-notched components
Gallo, P; Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)Geometrical discontinues such as notches play a significant rule in structural integrity of the components, especially when the component is subjected to very severe conditions, such as the high temperature fatigue or ... -
Effect of hot dip galvanization on the fatigue strength of steel bolted connections
Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo; Mutignani, F (Journal article; Peer reviewed, 2017)Hot dip galvanized steel bolted joints has been tested under fatigue loading to evaluate the effect of galvanizing coating on the fatigue strength of S355 structural steel. The experimental results showed that the decrease ... -
Failure assessment of steel/CFRP double strap joints
Majidi, Hamid Reza; Razavi, Seyed Mohammed Javad; Berto, Filippo (Journal article; Peer reviewed, 2017)In the current study, the failure behavior of retrofitted steel structures was studied experimentally and theoretically with steel/carbon fiber reinforced polymer (CFRP) double strap joints (DSJs) under quasi-static tensile ... -
Fatigue assessment of steel rollers by means of the local energy
Chebat, F; Cincera, M; Razavi, Seyed Mohammed Javad; Berto, Filippo; Welo, Torgeir (Journal article; Peer reviewed, 2017)This paper aims to analyses the fatigue behavior of steel rollers using the average strain energy density (SED) criterion. Considering the variability of the V-notch opening angle, a simple scalar quantity, i.e. the value ... -
Fatigue Assessment of Ti–6Al–4V Circular Notched Specimens Produced by Selective Laser Melting
Razavi, Seyed Mohammed Javad; Ferro, Paolo; Berto, Filippo (Journal article; Peer reviewed, 2017)Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries in a shorter design-to-manufacture cycle. However, the basic understanding of the fatigue behavior of ... -
Fatigue Crack Growth behavior of Additively Manufactured 17-4 PH Stainless Steel: Effects of thickness and surface condition
Agiollo, Davide (Master thesis, 2023)Additive Manufacturing (AM) revolutionized the field of manufacturing by enabling the production of complex geometries with greater design freedom. However, the use of these components for structural applications depends ... -
Fracture assessment of magnetostrictive materials
Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan; Colussi, M (Journal article; Peer reviewed, 2017)Giant magnetostrictive materials are gaining interest in the field of smart material, especially the commercially known Terfenol-D, that is an alloy made out of iron, terbium and dysprosium (Tb0.3Dy0.7Fe1.9). Since these ... -
Karakterisering av mekanisk respons etter sveising av to superlegeringer
Fjeld, Matilde Cassandra; Hulbak, Guri Sollien; Valle, Mari Røyne (Bachelor thesis, 2023)Prosjektet går ut på å karakterisere den mekaniske responsen etter sveising av to nikkelbaserte superlegeringer, Inconel Alloy 617 og Inconel Alloy 625. Dette skal gjøres ved å utføre to ulike metoder for materialprøving; ... -
Local strain energy density for the fatigue assessment of hot dip galvanized welded joints: Some recent outcomes
Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan; Mutignani, F (Journal article; Peer reviewed, 2017)Since in literature only data about the effect of the hot-dip galvanizing coating on fatigue behavior of unnotched specimens are available, whereas very few for notched components and none for welded joints, the aim of ... -
Local strain energy density for the fracture assessment of polyurethane specimens weakened by notches of different shape
Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan; Marsavina, L (Journal article; Peer reviewed, 2017)Recent studies on local stress fields in proximity of crack and notch tips have shown that Strain Energy Density (SED), averaged in a circular control volume surrounding the point of stress singularities, represents a ... -
Mode II brittle fracture: Recent developments
Campagnolo, A; Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)Fracture behaviour of V-notched specimens is assessed using two energy based criteria namely the averaged strain energy density (SED) and Finite Fracture Mechanics (FFM). Two different formulations of FFM criterion are ... -
Notch stress intensity factors under mixed mode loadings: An overview of recent advanced methods for rapid calculation
Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan (Journal article; Peer reviewed, 2017)Recently some methods for the rapid calculation of notch stress intensity factors (NSIFs) have been developed and three of them are compared in this work. First, the criteria proposed by Lazzarin et al. and Treifi et al. ... -
Notched graphite under multiaxial loading
Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)Cylindrical specimens made of polycrystalline graphite and weakened by circumferential V-notches under mixed mode I/III loading were studied in this research. Different geometries of V-notches varying the notch opening ... -
Structural Integrity of AISI 316L Fabricated via Material Extrusion Additive Manufacturing
Kolstad, Sondre Olsøybakk (Master thesis, 2022)Additiv produksjon er en utmerket metode for å produsere komplekse geometrier med forskjellige materialer. Generelt er stålkomponenter produsert for høystyrkeapplikasjoner på grunn av deres høye styrke og evne til å motstå ... -
The Effect of Heat-Treatment on Notched Ti-6Al-4V Specimens Produced by Selective Laser Melting Under Fatigue Loading
Flo, Oscar Benjamin (Master thesis, 2018)Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that can produce metallic parts of arbitrary geometry with densities greater than 99.7%. However, complex shapes lead to notches with different radii ... -
The fatigue behavior of V-notches in presence of residual stresses: Recent developments and future outcomes
Ferro, P; Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan (Journal article; Peer reviewed, 2017)Residual stresses, arising from welding processes or nonhomogeneous plastic deformations, broadly influence the high cycle fatigue behavior of mechanical components. The presence of V-notches leads to singular residual ... -
Thickness and scale effect on fracture behavior of PLA specimens fabricated via FDM
Fostervold, Rakel (Master thesis, 2021)Denne avhandlingen undersøker hvordan skalering og endring i tykkelse påvirker de mekaniske egenskapene til 3D-printet PLA, I tillegg undersøkes det hvordan printe-rekkefølgen påvirker egenskapene. Strekk tester ble utført ... -
Thickness Effect on Fatigue Behaviour of Ti-6Al-4V Specimens Produced by Electron Beam Melting
Vassbotn, Mimmi (Master thesis, 2019)Elektronstråle smelting (EBM) er en type additiv tilvirkning (AM) som brukes til å produsere metalliske komponenter med komplekse geometrier. AM komponenter er avhengig av fabrikasjonsprosessen og derfor også avhengig av ...