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  • SAGE Publications  (5)
  • Yang, Bing  (5)
  • English  (5)
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  • SAGE Publications  (5)
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  • English  (5)
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  • 1
    Online Resource
    Online Resource
    Dynamic constitutive relation of 5083P-O aluminium alloy and its influence on energy-absorbing structure
    SAGE Publications ; 2018
    In:  Advances in Mechanical Engineering Vol. 10, No. 10 ( 2018-10), p. 168781401880733-
    Details
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 10, No. 10 ( 2018-10), p. 168781401880733-
    Abstract: Dynamic and quasi-static tensile tests of 5083P-O aluminium alloy were carried out using RPL100 electronic creep/fatigue testing machine and the split Hopkinson tension bar, respectively. The dynamic constitutive relation of the material at high strain rates was studied, and the constitutive model in accordance with Cowper–Symonds form was established. At the same time, a method to describe the constitutive relation of material using the strain rate interpolation method which is included in LS-DYNA software was proposed. The advantages and accuracy of this method were verified by comparing the results of the finite element simulation with the fitting results of the Cowper-Symonds model. The influence of material strain rate effect on squeezing force, energy absorption and deformation mode of the squeezing energy-absorbing structure based on the constitutive models of 5083P-O were studied by means of finite element simulation. The results show that when the strain rate of the structure deformation is low, the material strain rate strengthening effect has little influence on the structure. However, with the increase of the strain rate, the strengthening effect of the material will improve the squeezing force and the energy absorption of the structure, and will also influence the deformation mode, that is, the decrease of the deformation with high strain rates while the increase of the deformation with low strain rates.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    URL: Article
    DOI: 10.1177/1687814018807334
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2501620-9
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  • 2
    Online Resource
    Online Resource
    Effect of material failure criteria on collision behavior of metro vehicle end structures
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit Vol. 237, No. 4 ( 2023-04), p. 419-428
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, SAGE Publications, Vol. 237, No. 4 ( 2023-04), p. 419-428
    Abstract: This study comprehensively analyzes the failure behavior of metro vehicle end structures (VESs) during collisions, using the common material SUS301L-MT in a stainless steel metro and its VES as the research object. First, constitutive and failure tests are performed on the material, the macro–micro characterization of its mechanical properties is performed, and the failure strains and morphologies under various stress states are obtained and discussed. Subsequently, two failure criteria, Von Mises (VM) and Generalized Incremental Stress State Dependent Damage Model (GISSMO), are calibrated and established. Finally, the crashworthiness evaluation indexes of the VES are defined, and vertical offset collisions of metro VESs for different speed levels are numerically analyzed. The results show that the stress triaxiality significantly affects the failure strain of stainless steel SUS301L-MT, with the maximal difference for different stress states reaching 51.10%. SUS301L-MT stainless steel exhibits strain-rate strengthening and yield hysteresis effects. Overall, the numerical results for the VM criterion are worse than for the GISSMO criterion, which more accurately describes the collision behavior of metro VESs under complex stress states.
    Type of Medium: Online Resource
    ISSN: 0954-4097 , 2041-3017
    URL: Article
    DOI: 10.1177/09544097221116520
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2024901-9
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  • 3
    Online Resource
    Online Resource
    Parameter study and multi-objective optimization for crashworthiness of a B-type metro train
    SAGE Publications ; 2022
    In:  Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit Vol. 236, No. 1 ( 2022-01), p. 91-108
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, SAGE Publications, Vol. 236, No. 1 ( 2022-01), p. 91-108
    Abstract: A train’s crashworthiness responses are directly affected by the vehicle weight M, train collision speed V, and empty stroke D. This study investigated the influences of M, V, and D on train crashworthiness. A one-dimensional multi-body dynamics model for a B-type metro train was created and verified. Approximate models were established for the total compression displacement (TS) and overall average collision deceleration (TMA) based on M, V, and D, and a novel method was proposed for quickly predicting the output response of a train’s crashworthiness. The effects of the various parameters on TS and TMA were investigated, and a multi-objective optimization for minimizing TS and TMA was conducted. The results indicated that V has the greatest influence on TS and TMA, followed by M, and then D; M has a positive effect on TS and negative effect on TMA, whereas D has a negative effect on both TS and TMA; V has a positive effect on TS, but for TMA, the effect changes from positive to negative when V increases to 23 km/h. The optimized metro train has higher integrity in the passenger living space and a lower train collision average deceleration, and the crashworthiness is significantly improved.
    Type of Medium: Online Resource
    ISSN: 0954-4097 , 2041-3017
    URL: Article
    DOI: 10.1177/09544097211008283
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2024901-9
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  • 4
    Online Resource
    Online Resource
    Application of the collision mathematical model based on a BP neural network in railway vehicles
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit Vol. 235, No. 6 ( 2021-07), p. 713-725
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, SAGE Publications, Vol. 235, No. 6 ( 2021-07), p. 713-725
    Abstract: In order to enhance the learning performance of small-data-set models and improve the computation efficiency of finite element simulations of vehicle collision, the collision mathematical model (VCMM) based on the back-propagation (BP) neural network is established to predict the collision response data of a single car and marshalling cars at unknown velocities. The predicted results of VCMM were compared with the simulation results of the finite element method (FEM) to verify the model. The compared results show that the maximum relative errors of deformation, energy absorption and average interfacial force of a single vehicle are all below 8.5%, and the relative errors of the maximum compression of the C0 coupler and the internal energy of the A1 car among the marshalling cars are all less than 5%. In addition, the calculation time of the single car and marshalling cars collisions based on the VCMM are reduced by 24.36 and 61.8 times, respectively, compared with the FEM results, and the simulation calculation efficiency is greatly improved. The prediction result of VCMM will partially replace experimental and simulation results for crashworthiness and safety design of the vehicle structure in future studies.
    Type of Medium: Online Resource
    ISSN: 0954-4097 , 2041-3017
    URL: Article
    DOI: 10.1177/0954409720959869
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2024901-9
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  • 5
    Online Resource
    Online Resource
    Study on the influence factors of impact ejection performance for flexible airbag
    SAGE Publications ; 2018
    In:  Advances in Mechanical Engineering Vol. 10, No. 10 ( 2018-10), p. 168781401880733-
    Details
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 10, No. 10 ( 2018-10), p. 168781401880733-
    Abstract: In order to improve the impact ejection performance of the flexible airbag and to reveal the airbag inflating mechanism, a simulation model was built and verified by carrying out the flexible airbag impact ejection test. Based on this model, the influence of mass flow, compression displacement, and airbag thickness on flexible airbag ejection impact performance were studied. The results show that the ejection velocity of the flexible airbag increases as mass flow increases, but the excessive air mass flow does not improve the impact ejection performance of the airbag. The simulation results also demonstrate that the flexible airbag will oscillate reciprocally after it has no more contact with the moving rigid body and every node in the flexible airbag model has the same oscillating displacement. The analysis of compression displacement shows that it has a significant effect on the improvement of ejection performance. In conclusion, to improve the impact ejection performance of flexible airbag, the mass flow and compression displacement should be changed in a certain scope, which can provide reference for the topological structure design of the flexible airbag.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    URL: Article
    DOI: 10.1177/1687814018807333
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2501620-9
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