Stress concentration factors in tubular T/Y-connections reinforced with FRP under in-plane bending load

Nassiraei, Hossein; Rezadoost, Pooya

doi:10.1016/j.marstruc.2020.102871

Cited by 32 publications

(8 citation statements)

References 31 publications

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“…The present model was validated with the configuration (1) of the literature [36], in which the author compared the results of the numerical model with the experimental results. The variable used in the validation was peel stress generated in the adhesive upon deformation in quasi-static loading.…”

Section: Model Validationmentioning

confidence: 99%

“…It was also concluded that the researchers mainly focused on investigating the fracture behavior of the interface region in single-lap joints. However, there is a substantial stress concentration on the middle and edge portions, and the investigation of areas with a high stress concentration is compulsory and highly significant [34][35][36]. Therefore, this research involved the development of a methodology to investigate the effects of both increases in temperature and the inclusion of aluminum oxide nanoparticles on the stress behavior at different locations on the adhesive region.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Temperature and Al2O3 NanoFiller on the Stress Field of CFRP/Al Adhesively Bonded Single-Lap Joints

et al. 2022

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In this paper, the effect of aluminum oxide, Al2O3, nanoparticles’ inclusion into Epocast 50-Al/946 epoxy adhesive at different temperatures, subjected to quasi-static tensile loading, is numerically investigated. The single-lap adhesive joint with two different types of material adherends (composite fiber-reinforced polymer (CFRP) and aluminum (Al) 5083 adherends) and adhesive Epocast 50-A1/hardener 946 were modeled in ABAQUS/CAE. A numerical methodology was proposed to analyze the effect on peel stress and shear stress by adding Al2O3 nanoparticles into the neat adhesive at 25 °C, 50 °C, and 75 °C temperatures at four different locations of the adhesive regions: the interface of the adhesive and aluminum adherend (location A), the middle plane of the adhesive region (location B), the middle longer edge (along the length of the adhesive, location C), and the middle shorter edge (along the width of the adhesive, location D). The results showed that adding nanoparticles into the neat adhesive improves joint strength at room and elevated temperatures. High peel and shear stresses were recorded near both edges of the locations (A, B, C, and D). For location A, adding nanofillers into the adhesive resulted in the reduction in peak peel stress by 1.3% for 25 °C; however, it increased by 2.7% and 10.7% for 50 °C and 75 °C temperatures, respectively. Furthermore, the peak shear stress observed a considerable reduction of 19.6% for 25 °C, but it increased by 7.7% and 8.7% for 50 °C and 75 °C temperatures, respectively, for location A. The same trend was also observed for other locations (i.e., B, C, and D). This signified that adding aluminum oxide nanoparticles in the adhesive resulted in increased stiffness at higher temperatures and increased ductility of the joint, as compared to the joint with neat adhesives at room temperature. Moreover, it was observed that locations A and B were more vulnerable to damage initiation, as the peak of stresses lay near the edges, indicating that the crack initiation would take place close to the edges and propagate towards the center, leading to ultimate failure.

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Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Al2O3 NanoFiller on the Stress Field of CFRP/Al Adhesively Bonded Single-Lap Joints

et al. 2022

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“…Lightweight materials are the eternal goal of the aerospace field, where even the reduction of each gram is rigorously considered [ 1 , 2 , 3 , 4 , 5 ]. As the applications of resin matrix composites, mainly carbon or glass fiber-reinforced polymers (CFRP or GFRP), have increased in aerospace component manufacturing, the preparation of high-strength heterojunctions between metals and thermoplastics has become a major concern [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Joining of Continuous Carbon Fiber-Reinforced PEEK and Titanium Alloy with High Strength

Wang

Ren

2022

Polymers

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The generation of high-performance heterojunctions between high-strength resin matrix composites and metals is of great significance for lightweight applications in fields such as aerospace and automobile engineering. Herein, we explored the feasibility of employing a laser joining process to achieve high-strength heterojunctions between continuous carbon fiber-reinforced PEEK (CCF30/PEEK) composites and titanium alloy (Ti6Al4V). A joint strength of over 50 MPa was achieved through constructing mechanical interlocking structures between CCF30/PEEK and Ti6Al4V. Tensile tests revealed that the fracture of joints was mainly ascribed to the detachment of carbon fibers from the resin matrix and the breakage of carbon fibers. The structures with different orientations and dimensions were confirmed to significantly influence the formation of interlocking structures near the joining interface and the resultant fracture strength of joints. It is believed that the results presented in this study provide a strong foundation for the production of high-performance heterojunctions.

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“…Many scholars around the world have studied this typical fatigue damage of a gear under cyclic loading, mainly focusing on the crack initiation, crack propagation and crack development patterns of tooth fracture with a series of experimental studies [ 9 , 10 ]. Domestic and foreign scholars have carried out experimental studies on the fatigue of gears through chemical analysis, metallographic investigation, hardness measurement and other methods.…”

Section: Introductionmentioning

confidence: 99%

A State-Based Peridynamic Flexural Fatigue Model for Contact and Bending Conditions

Han

Chen

et al. 2022

Materials

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To address flexural fractures and predict fatigue life, an ordinary state-based peridynamic (PD) fatigue model is proposed for the initiation and propagation of flexural fractures. The key to this model is to replace the traditional partial differential fracture model with a spatially integral peridynamic model. Based on the contact and slip theory, the nonlocal peridynamic contact algorithm is confirmed and the load transfer is through the contact area. With the 3D peridynamic J-integration and the energy-based bond failure criterion, the peridynamic fatigue model for flexural cracks’ initiation and propagation is constructed. The peridynamic solid consists of a pair of gear contact surfaces and the formation and growth of flexural fatigue cracks evolved naturally over many loading cycles. The repeated load is transferred from the drive gear to the follower gear using the nonlocal peridynamic contact algorithm. The improved adaptive dynamic relaxation approach is used to determine the static solution for each load cycle. The fatigue bending crack angle errors are within 2.92% and the cycle number errors are within 10%. According to the experimental results, the proposed peridynamic fatigue model accurately predicts the location of the crack without the need for additional criteria and the fatigue life predicted by the simulation agrees quite well with the experimental results.

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Stress concentration factors in tubular T/Y-connections reinforced with FRP under in-plane bending load

Cited by 32 publications

References 31 publications

Effect of Temperature and Al2O3 NanoFiller on the Stress Field of CFRP/Al Adhesively Bonded Single-Lap Joints

Effect of Temperature and Al2O3 NanoFiller on the Stress Field of CFRP/Al Adhesively Bonded Single-Lap Joints

Laser Joining of Continuous Carbon Fiber-Reinforced PEEK and Titanium Alloy with High Strength

A State-Based Peridynamic Flexural Fatigue Model for Contact and Bending Conditions

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