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Suresh, Aswin (author)Wire arc additive manufacturing (WAAM) can create large parts, due to its high deposition rate. WAAM can be used to create functionally graded materials (FGMs) such as a strong core of high strength low alloy (HSLA) steel and corrosion-resistant cladding of austenitic stainless (AUS) steel. However, HSLA and AUS steel are dissimilar metals with...master thesis 2024
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Shakeri, I. (author), Wu, W. (author), Michel, Alexander (author), Eder, Martin A. (author)The present study proposes a novel model to modify master S-N curves of components according to their load redistribution capability reflected in different boundary conditions (BCs) based on the fracture mechanics analysis. To that end, a comprehensive numerical study was conducted on a Single Edge Notch Bend (SENB) specimen constrained with...journal article 2024
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Leonetti, D. (author), Schotsman, B. (author)This study reports an experimental investigation of the fatigue and fracture resistance of R350HT, a heat-treated pearlitic rail steel with refined microstructure used in rails. Monotonic tensile, rotating bending, linear elastic plane strain fracture toughness, and fatigue crack growth rate tests are presented. The results are used to...journal article 2024
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van Noord, Emma (author)The increasing focus on reducing greenhouse gas emissions has led to the attractiveness of offshore hydrogen pipelines in achieving sustainable energy goals. Hydrogen, as a transport medium for energy, offers a viable alternative for transmitting large amounts of energy from offshore facilities to the shore. By storing hydrogen and subsequently...master thesis 2023
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Macallister, N. (author), Chellu, Sreyas (author), Riemslag, A.C. (author), Scott, S.P. (author), Ayas, C. (author), Popovich, V. (author), Becker, Thorsten Hermann (author)Sub-size specimen testing offers a potentially elegant solution to accompany fatigue life assessments in determining vital fatigue parameters such as effective fatigue crack growth propagation thresholds (ΔK<sub>th,eff</sub>). Additively manufactured parts stand to benefit from this in potential build-by-build fatigue validation without...journal article 2023
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Mohammadi, R. (author), Akrami, R. (author), Assaad, Maher (author), Nasor, Mohamed (author), Imran, Ahmed (author), Fotouhi, M. (author)In this study, the fatigue properties of carbon fiber-reinforced polymer (CFRP) composite laminates were investigated, specifically focusing on the incorporation of 100-µm polysulfone (PSU) nanofibers as an interleaving material. The PSU nanofibers were produced using the electrospinning technique. Both quasi-static and fatigue tests were...journal article 2023
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Leonetti, Davide (author), Mattos Ferreira, V. (author), Schotsman, B. (author)R350HT is a standard premium heat-treated rail steel and the reference for new rail steel development. The present study discusses an experimental characterization of fatigue crack growth rate and fracture toughness for this refined pearlitic rail steel in mode-I-loading. The tests are carried out on compact tension specimens extracted from...journal article 2023
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Feng, W. (author), Moreira Arouche, M. (author), Pavlovic, M. (author)Hybrid bi-material concepts in engineering structures where fibre-polymer composites are used together with steel structural members have potential to reduce material usage, extend fatigue life and improve structural reliability. The bond performance of the bi-material composite-to-steel interface is of crucial importance and highly relies on...journal article 2023
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van Kuijk, J.J.A. (author)Fatigue crack growth in metals has been studied intensively for more than half a century. This research field has been closely connected to the engineering industry throughout history. It is therefore no surprise that the main focus has mostly been on developing better prediction models rather than on understanding the phenomenon of fatigue...doctoral thesis 2022
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Quan, H. (author)Fatigue failures are a major concern in aeronautics. The growth of fatigue cracks in metallic structures and adhesively bonded joints has been studied for decades. Nowadays, most researchers evaluate and predict the fatigue damage growth rate (da/dN) with empirical and phenomenon based approaches, using Linear Elastic Fracture Mechanics with...doctoral thesis 2022
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Ghorbanpour, S. (author), Deshmukh, Kaustubh (author), Sahu, Saswat (author), Riemslag, A.C. (author), Reinton, T.E. (author), Borisov, Evgenii (author), Jiang, Quanxin (author), Terol Sanchez, M. (author), Knezevic, Marko (author), Popovich, V. (author)This paper addresses the effect of the post-process heat treatments on the microstructure and fatigue crack growth behaviour of the functionally graded (FG) laser powder bed fusion (L-PBF) Inconel 718 (IN718) superalloy. Sets of samples were additively manufactured (AM) altering the process parameters, namely the laser power, the laser...journal article 2022
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Heng, J. (author), Zhou, Zhixiang (author), Zou, Yang (author), Kaewunruen, Sakdirat (author)Rib-to-deck (RD) welded joints in orthotropic steel decks (OSDs) of bridges demonstrates two major fatigue failure models, including the toe-to-deck (TTD) cracking and root-to-deck (RTD) cracking. Generally, the sole failure model is employed in the fatigue assessment of RD joints, causing a hot dispute on the dominant failure model. In this...journal article 2022
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Pedrosa, Bruno (author), Correia, J.H.G. (author), Lesiuk, Grzegorz (author), Rebelo, Carlos (author), Veljkovic, M. (author)The UniGrow model is an analytical procedure to assess the fatigue crack growth based on elastic–plastic crack tip stresses and strains. The assumption is that fatigue crack growth (FCG) can be considered as a process of successive crack re-initiations resulting from material damage in the crack tip zone. The main parameters of this model are...journal article 2022
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Quan, H. (author), Alderliesten, R.C. (author)An energy equation for fatigue crack growth in adhesive joints is proposed. Fatigue experiment on DCB adhesive joint specimens was used to derive the relation between fatigue crack growth rate (da/dN) and energy variables in this equation. The result shows plastic dissipation and change in stored strain energy, whose relation with da/dN both...journal article 2022
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Quan, H. (author), Alderliesten, R.C. (author)An energy equation for fatigue crack growth was proposed. It equates the total external work per cycle (dW/dN) to the sum of plastic dissipation (dU<sub>pl</sub>/dN), change in strain energy stored (dU<sub>e</sub>/dN) and the energy dissipated in new crack surface formation (dU<sub>a</sub>/dN). Fatigue crack growth experiment of 7075-T6 was...journal article 2022
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Li, Z. (author)Surface cracks are serious threats to the structural integrity of offshore metallic pipes. This dissertation proposes a protocol of composite reinforcement on surface cracked metallic pipes subjected to cyclic loads, aiming to decrease the crack growth rate and prolong the residual fatigue life. The main objective of this dissertation is to...doctoral thesis 2021
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Jones, Rhys (author), Rans, C.D. (author), Iliopoulos, Athanasios P. (author), Michopoulos, John G. (author), Phan, Nam (author), Peng, Daren (author)The United States Air Force (USAF) Guidelines for the Durability and Damage Tolerance (DADT) certification of Additive Manufactured (AM) parts states that the most difficult challenge for the certification of an AM part is to establish an accurate prediction of its DADT. How to address this challenge is the focus of the present paper. To this...journal article 2021
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Shakeri, Iman (author), Shahani, Amir Reza (author), Rans, C.D. (author)Since welded joints in structures are known to be critical regions for crack initiation and growth, study of fatigue crack growth behavior of welded joints under various loading scenarios are essential. In present study, two groups of experiments were conducted. At first, fatigue crack growth behavior of Al5083 butt welded joint subjected to...journal article 2021
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, Lambertus J. (author)This study presents calibration and validation of a cohesive extended finite element model for fatigue crack propagation in ductile materials. The approach relies on a separation between plasticity around the crack tip and fatigue crack growth at the crack tip such that the influence of plasticity on fatigue driving forces is predicted. This...journal article 2021
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Quan, H. (author), Alderliesten, R.C. (author)Plastic dissipation accompanies fatigue crack growth in ductile materials. Previous studies presented a relation between plastic dissipation (dW/dN) and the fatigue crack growth rate (da/dN), where some researchers assumed a linear relation between both to enable crack growth predictions. To study the validity of this assumption, this paper...journal article 2021