Work Hardening Behavior of 1020 Steel During Cold-Beating Simulation

Cui, Feng; Ling, Y. F.; Xue, Jinxue; Liu, Jia; Liu, Yuhui; Li, Yan

doi:10.1007/s10033-017-0086-4

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…The difference between the different processing parameters in the spline cold roll-beating test is calculated by the sum of the average deviations of the average result of cold roll-beating test according to (5). The formula for calculating the degree of freedom of each factor is as shown in (6), and the degree of freedom error is calculated using (7). The analysis results of the variation are shown in Table 5.…”

Section: Analysis Of the Experimental Results For The Cold Roll-mentioning

confidence: 99%

“…Mingshun et al improved the cold roll-beating forming principle by introducing an analytical formula to obtain the deformation force using the principal stress method and then using Abaqus to establish a high-speed cold rollbeating simulation, analyzing the variation law of deformation force and the influence law of process parameters on the deformation force and further analyzing the influence of the process parameters on the surface properties of a cold roll-beating workpiece [5,6]. Cui et al performed simulated cold rolling experiments and scanning electron microscopy at room temperature and studied the dislocation mechanism and the work-hardening rate of 20 steel; they identified the relationships between the dislocation density and the strain and between the work-hardening rate and the dislocation density [7]. Yan et al established a cold rollbeating screw numerical simulation program and analyzed the microstructure deformation, hardness distribution, and hardened layer distribution of the screw through the analysis of stress field and strain field numerical simulation results and screw cold roll-beating forming test results; in addition, numerical simulations and experiments were combined to study the metal flow law in the process of screw cold rolling [8].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Cui

et al. 2018

Mathematical Problems in Engineering

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The aim of this work is to control the physical and mechanical properties of a spline surface and achieve a reasonable choice of high-speed cold roll-beating processing parameters. The surface residual stress and surface work hardening at the indexing circle serve as the main evaluation indices of the physical and mechanical properties of the spline surface. The influence degree of the processing parameters on each evaluation index is analyzed using Taguchi theory. An optimized model for improving the Taguchi process capability index that combines Taguchi theory with entropy theory is established, and the integral process capacity index is optimized via the generalized price reduction gradient method. The results of the optimization and the verification test are implemented in a high-speed cold roll forming test for comparison. The results show that the influence of processing parameters on the physical and mechanical properties of the splash surface of the cold roll can be ordered as follows: feed rate > roll round radius > cold roll-beating speed. In addition, the spline surface physical and mechanical properties of the optimal processing parameters were obtained for the combination of a cold rolling speed of 1581 r/mm, feed rate of 42 mm/min, and roll round radius of 2 mm.

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Section: Analysis Of the Experimental Results For The Cold Roll-mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Cui

et al. 2018

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

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“…Combined with the results of magnetic observations, one can image that some magnetic domains are stuck due to micro defects in the No-History specimens with a residual strains over 1% and form a focused orientation under the influence of these defects. On the other hand, considering the loading process of History specimens of small residual strains, micro defects are more likely to be formed at new positions instead of to be expanded to large size due to the strain hardening effect [27,28]. Thus the size of pinning defect in 1% History specimen will be much smaller than that in No-History specimens while the number of these defects are much higher in contrast.…”

Section: Discussionmentioning

confidence: 99%

Caution to Apply Magnetic Barkhausen Noise Method to Nondestructive Evaluation of Plastic Deformation in Some Ferromagnetic Materials

Matsumoto

Uchimoto

et al. 2019

Chin. J. Mech. Eng.

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Magnetic Barkhausen Noise (MBN) method is known as an effective nondestructive evaluation (NDE) method for evaluation of residual stress in ferromagnetic materials. Some studies on the feasibility of the MBN method for NDE of residual strains were also conducted and found applicable. However, these studies are mainly focused on the state of residual strains which were introduced through a one-cycle-loading process. In practice, however, structures may suffer from an unpredictable and complicated loading history, i.e., the final state of plastic strain may be induced by several times of large loads. Whether the loading history has influences on MBN signals or not is of great importance for the practical application of the MBN method. In this paper, several ferromagnetic specimens with the same final state of residual strain but of different loading history were fabricated and inspected by using a MBN testing system. The experimental results reveal that the loading history has a significant influence on the detected MBN signals especially for a residual strain in range less than 1%, which doubts the feasibility to apply the MBN method simply in the practical environment. In addition, micro-observations on the magnetic domain structures of the plastic damaged specimens were also carried out to clarify the influence mechanism of loading history on the MBN signals.

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Safety Assessment of Aircraft Fuel Tank Access Cover under the Impact Load by Tire Fragments

Yao

Yue

Geng

et al. 2019

Chin. J. Mech. Eng.

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According to relevant airworthiness standards, the aircraft fuel tank access cover must withstand the impact by tire fragments, and minimize the penetration and deformation, which is critical for flight safety. To assess the safety of an aircraft fuel tank access cover subjected to tire fragments, a study of dynamic response was presented in this paper using the Finite element (FE) software ANSYS/LS-DYNA. To obtain the reliable mechanical characteristics of tire tread rubber, a series of material tests have been conducted. Then the proposed rubber material model is validated by comparing the numerical simulations with the experimental results of aluminium alloy plate impact. The simulation results indicate that the rubber fragment and alloy plate will undergo the largest deformation when impact angle is equal to 90°. Finally, the proposed FE model and modelling approaches are extended to the numerical simulation of a full-scale aircraft fuel tank access cover impact. The numerical simulations are carried out with impact velocity of 71.1 m/s and impact angle of 40.5°. The simulation results indicate that the aluminium alloy by precision casting is more likely to rupture, and the middle region of the access cover is vulnerable to fragment impact. This research proposes a reliable rubber model applying to various strain rates. Considering the influence of impact regions, the dynamic response and various failure patterns of fuel tank access cover are acquired. The findings of this paper can be used to improve the future aircraft safety design. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Work Hardening Behavior of 1020 Steel During Cold-Beating Simulation

Cited by 3 publications

References 27 publications

Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Caution to Apply Magnetic Barkhausen Noise Method to Nondestructive Evaluation of Plastic Deformation in Some Ferromagnetic Materials

Safety Assessment of Aircraft Fuel Tank Access Cover under the Impact Load by Tire Fragments

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