Fatigue Analysis of Engineering Structures: State of Development and Achievement

Fajri, Aprianur; Prabowo, Aditya Rio; Muhayat, Nurul; Smaradhana, Dharu Feby; Bahatmaka, Aldias

doi:10.1016/j.prostr.2021.10.004

Cited by 10 publications

(5 citation statements)

References 39 publications

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“…The fatigue properties of aluminum alloy joints play an important role in the safety and reliability of structural assemblies [ 6 ], with up to 90% of engineering constructions failing because of fatigue [ 7 ]. Researchers have found that excess solute Mg can improve the fatigue strength and fatigue life of 6xxx alloys [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Welding of AA6061-T6 Sheets Using High-Strength 4xxx Fillers: Effect of Mg on Mechanical and Fatigue Properties

et al. 2023

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Al-Si-Mg 4xxx filler metals are widely used in aluminum welding owing to their excellent weldability and capability for strength enhancement by heat treatment. However, weld joints with commercial Al-Si ER4043 fillers often exhibit poor strength and fatigue properties. In this study, two novel fillers were designed and prepared by increasing the Mg content in 4xxx filler metals, and the effects of Mg on the mechanical and fatigue properties were studied under as-welded and post-weld heat-treated (PWHT) conditions. AA6061-T6 sheets were used as the base metal and welded by gas metal arc welding. The welding defects were analyzed using X-ray radiography and optical microscopy, and the precipitates in the fusion zones were studied using transmission electron microscopy. The mechanical properties were evaluated using the microhardness, tensile, and fatigue tests. Compared to the reference ER4043 filler, the fillers with increased Mg content produced weld joints with higher microhardness and tensile strength. Joints made with fillers with high Mg contents (0.6–1.4 wt.%) displayed higher fatigue strengths and longer fatigue lives than joints made with the reference filler in both the as-welded and PWHT states. Of the joints studied, joints with the 1.4 wt.% Mg filler exhibited the highest fatigue strength and best fatigue life. The improved mechanical strength and fatigue properties of the aluminum joints were attributed to the enhanced solid-solution strengthening by solute Mg in the as-welded condition and the increased precipitation strengthening by β″ precipitates in the PWHT condition.

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Section: Introductionmentioning

confidence: 99%

Welding of AA6061-T6 Sheets Using High-Strength 4xxx Fillers: Effect of Mg on Mechanical and Fatigue Properties

et al. 2023

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“…Mechanical failures due to fatigue account for 80%-90% of bulk material failures [256]. Furthermore, fatigue fracture by dynamic loading typically occurs at stresses significantly lower than quasi-static strengths, which underscores the need to capture the fatigue properties of emerging 2D materials.…”

Section: Fatiguementioning

confidence: 99%

Recent advances in the mechanics of 2D materials

Wang

Hou

Yan

et al. 2023

Int. J. Extrem. Manuf.

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The exceptional physical properties and unique layered structure of two-dimensional (2D) materials has made this class of materials great s candidate for applications in electronics, energy conversion/storage devices, nanocomposites, and multifunctional coatings, among others. At the center of this application-space, mechanical properties play a vital role in materials design, manufacturing, integration and performance. The emergence of 2D materials has also sparked broad scientific inquiry, with new understanding of mechanical interactions between 2D structures and interfaces being of great interest to the community. Building on the dramatic expansion of research activity in recent years, here we provide a review of recent advances in the understanding of the elastic properties, in-plane failures, fatigue performance, interfacial shear/friction, and adhesion behavior of 2D materials. In this article, special emphasis is placed on some new 2D materials, novel characterization techniques and computational methods, as well as insights into deformation and failure mechanisms. A deep understanding of the intrinsic and extrinsic factors that govern 2D material mechanics is further provided, in the hopes that the community may draw design strategies for structural and interfacial engineering of 2D material systems. We end this review article with a discussion of our perspective on the state of the field and outlook on areas for future research directions.

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“…These forces result in fluctuating stresses, which are responsible for approximately 80% of fatigue-related failures in mechanical components. 2 In real-world scenarios, the pattern of stress variation is frequently irregular and difficult to predict, as observed in the case of stresses induced by vibrations. Seif et al 3 investigated the drilling effects on the bearing strength of a composite material comprised of epoxy reinforced with glass and aluminum mesh.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical components in diverse applications undergo fluctuating forces of varying magnitudes over time. These forces result in fluctuating stresses, which are responsible for approximately 80% of fatigue‐related failures in mechanical components 2 . In real‐world scenarios, the pattern of stress variation is frequently irregular and difficult to predict, as observed in the case of stresses induced by vibrations.…”

Section: Introductionmentioning

confidence: 99%

Effect of nano‐silica on fatigue behavior of glass fiber‐reinforced epoxy composite laminates: A Weibull distribution approach

Gupta,

Singh,

Saini

2023

Polymer Composites

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The aim of this study is to assess the impact of nano‐silica in glass fiber‐reinforced epoxy composite (GFEC) subjected to static and fatigue loading. Laminates were prepared in compression molding machine followed by the tensile test and tension‐tension fatigue testing at five different stress levels (from 50% to 90% of ultimate tensile strength). The addition of 3 wt% of nano‐silica with epoxy improved the tensile and fatigue strength as compared to neat GFEC. Scanning electron microscope (SEM) images of the fractured specimen showed the damage pattern which indicates that neat GFEC laminate exhibited damage patterns characterized by fiber breakage and matrix cracking. On the other hand, the modified GFEC with nano‐silica showed damage patterns including fiber pullout accompanied by fiber breakage and matrix cracking. During cyclic loading, the stress–strain hysteresis loop shows a reduced slope, indicating a decrease in the dynamic modulus of the specimen. This reduction in slope signifies a loss of stiffness during cyclic loading, particularly at high‐stress levels. The highest dynamic modulus at high‐stress levels indicates a rapid progression of severe damage and a shorter fatigue life. On the other hand, at low‐stress levels, the lower magnitude of dynamic modulus suggests a moderate damage progression and a longer fatigue life.Highlights Effect of nano‐silica in GFEC under static and fatigue loading conditions. GFEC with 3 wt% of nano‐silica shows improved tensile and fatigue strength. Examination of damage patterns through SEM analysis of the fractured surface. Depiction of the failure modes using damage pattern under fatigue loading. Comparison of fatigue life and dynamic modulus for neat and modified GFEC.

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Fatigue Analysis of Engineering Structures: State of Development and Achievement

Cited by 10 publications

References 39 publications

Welding of AA6061-T6 Sheets Using High-Strength 4xxx Fillers: Effect of Mg on Mechanical and Fatigue Properties

Welding of AA6061-T6 Sheets Using High-Strength 4xxx Fillers: Effect of Mg on Mechanical and Fatigue Properties

Recent advances in the mechanics of 2D materials

Effect of nano‐silica on fatigue behavior of glass fiber‐reinforced epoxy composite laminates: A Weibull distribution approach

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