Determination of opening stresses for railway steel under low cycle fatigue using digital image correlation

Rashid, Ans Al; Imran, Ramsha; Khalid, Muhammad Yasir

doi:10.1016/j.tafmec.2020.102601

Cited by 16 publications

(10 citation statements)

References 18 publications

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“…The crack propagation was simulated after the identification of material model parameters, and crack closure was observed using the finite element method (FEM). Obtained results were compared with experimental results from digital image correlation analysis reported in a previous study [25].…”

Section: Methodsmentioning

confidence: 99%

“…The reported study, for the first time, presents the use of virtual extensometers to evaluate opening stress levels from FEA. In this study, numerical simulation of plasticity induced fatigue crack growth was performed using the Chaboche plasticity model, and results were compared to experimentally obtained opening stress levels using DIC presented in another study conducted by authors [25].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Simulation Technique for Evaluation of Opening Stresses Under High Plasticity

Rashid

Imran

Arif

et al. 2021

Journal of Manufacturing Science and Engineering

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The crack closure phenomenon is important to study as it estimates the fatigue life of the components. It becomes even more complex under low cycle fatigue (LCF) since under LCF high amount of plasticity is induced within the material near notches or defects. As a result, the assumptions used by the linear elastic fracture mechanics (LEFM) approach become invalid. However, several experimental techniques are reported on the topic, the utilization of numerical tools can provide substantial cost and time-saving. In this study, the authors present a finite element simulation technique to evaluate the opening stress levels for two structural steels (25CrMo4 and 30NiCrMoV12) under low cycle fatigue conditions. The LCF experimental results were used to obtain kinematic hardening parameters through the Chaboche model. The finite element analysis (FEA) model was designed and validated, following the fatigue crack propagation simulation under high plasticity conditions using ABAQUS. Crack opening displacement vs. stress data was exported from ABAQUS, and 1.5% offset method was employed to define opening stress levels. Numerical simulation results were compared with the experimental results obtained earlier through the digital image correlation (DIC) technique. To conclude, FEA could be a valuable tool to predict crack closure phenomena and, ultimately, the fatigue life of components. However, analysis of opening stresses using crystal plasticity models or extended finite element method (XFEM) tools should be explored for a better approximation in future studies.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation Technique for Evaluation of Opening Stresses Under High Plasticity

Rashid

Imran

Arif

et al. 2021

Journal of Manufacturing Science and Engineering

Self Cite

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show abstract

“…Recently, due to the development of novel materials and manufacturing processes, there has been an increasing need to utilize advanced manufacturing processes, materials and evaluate their mechanical behavior under extreme operating conditions [1,2]. Increasing interest has been observed to produce biodegradable materials for plenty of automotive parts rather than typically used glass, carbon, Kevlar, and other synthetic reinforcements that are hard to recycle [3,4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization of glass and jute fiber-based hybrid composites fabricated through compression molding technique

et al. 2021

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Natural fibers, especially jute fibers, have gained interest in recent decades due to their attractive mechanical properties, high cellulose percentage, low cost, biodegradability, and easy availability. In the present study, flexural and drop weight impact behavior for different weight percentages of glass and jute fiber reinforced epoxy composites are studied experimentally according to ASTM standards. The hybrid composites were prepared through the compression molding technique. Numerical simulations were performed to investigate the predictive flexural response. The leading cause of error between experimental and numerical results is the manufacturing process and the reinforcement's woven nature. On the other hand, the impact strength was studied through drop weight testing at fixed 10 J energy. It is found that damage area decreases with increasing jute percentage in glass/jute hybrid composites, showing that jute fiber contributes more towards the composites' impact strength than glass fiber. Therefore, jute fiber can replace glass fiber in the glass/jute hybrid composite as a natural and eco-friendly constituent. The microscopic study reveals that the outer glass fiber layer helps minimize the stress distribution of jute fiber. A significant drawback of compression molding is the epoxy affluent areas in the composite.

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“…CFR3DP composites offer an opportunity to fabricate high-strength and lightweight components for the automotive, aerospace, and medical industries [ 12 ]. Investigation of mechanical behavior of materials primarily included tensile, flexural, fatigue, and creep analysis [ 6 , 13 ]. Besides, several analytical models are also reported in the literature to predict the physical and mechanical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Creep and Recovery Behavior of Continuous Fiber-Reinforced 3DP Composites

Rashid

Koҫ

2021

Polymers

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The commercial availability of 3D printers for continuous fiber-reinforced 3D-printed (CFR3DP) composites has attracted researchers to evaluate the thermomechanical properties of these materials. The improvement of strength through chopped or continuous fiber reinforcements in polymers could provide remarkable results, and its exploration can provide broad applications in several industries. The evaluation of mechanical properties of these materials at elevated temperatures is vital for their utilization in severe operating conditions. This study provides insight into the effect of different fiber reinforcements (Kevlar, fiberglass, and high-strength high-temperature fiberglass) and temperatures on the creep and recovery behavior of CFR3DP Onyx composites. Experimental results were also compared with analytical models, i.e., Burger’s model and Weibull distribution function, for creep and recovery. Results from analytical models agreed well with experimental results for all the materials and temperatures. A significant drop in maximum and residual strains was observed due to the introduction of fibers. However, the creep resistance of all the materials was affected at higher temperatures. Minimum creep strain was observed for Onyx-FG at 120 °C; however, at the same temperature, the minimum residual strain was observed for Onyx-KF. Based on the analytical models and experimental results, the role of fiber reinforcements on the improvement of creep and recovery performance is also discussed.

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Determination of opening stresses for railway steel under low cycle fatigue using digital image correlation

Cited by 16 publications

References 18 publications

Finite Element Simulation Technique for Evaluation of Opening Stresses Under High Plasticity

Finite Element Simulation Technique for Evaluation of Opening Stresses Under High Plasticity

Mechanical characterization of glass and jute fiber-based hybrid composites fabricated through compression molding technique

Creep and Recovery Behavior of Continuous Fiber-Reinforced 3DP Composites

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