The Experts below are selected from a list of 354 Experts worldwide ranked by ideXlab platform

Cuevas Caballero, Javier Manuel - One of the best experts on this subject based on the ideXlab platform.

  • Correlation of a fe vehicle with an equivalent macro element model, focused on the us ncap pole side impact test
    'Universitat Politecnica de Valencia', 2015
    Co-Authors: Cuevas Caballero, Javier Manuel
    Abstract:

    In order to increase time efficiency during the design stage of a Crashworthy Structure, Jaguar-Land Rover is interested in investigating the Macro Element Method, as modelling and simulation time is considerably reduced when compared with Finite Element simulations, but results are still similar. The objective of this document is to assess the quantitative differences between both approaches, identifying the advantages, disadvantages and limitations of the Macro Element Method through the study of the pole side impact test of a full scale vehicle. It is done following an increasing complexity philosophy: simple models were developed first in order to get some preliminary conclusions, and step by step the full scale vehicle was modelled and correlated. According to the results obtained, the Macro Element Method has proved to be a real possibility for automotive companies interested in increasing efficiency during the initial design phase of a Crashworthy Structure.Cuevas Caballero, JM. (2014). Correlation of a fe vehicle with an equivalent macro element model, focused on the us ncap pole side impact test. http://hdl.handle.net/10251/50155Archivo delegad

  • Correlation of a fe vehicle with an equivalent macro element model, focused on the us ncap pole side impact test
    'Universitat Politecnica de Valencia', 2015
    Co-Authors: Cuevas Caballero, Javier Manuel
    Abstract:

    In order to increase time efficiency during the design stage of a Crashworthy Structure, Jaguar-Land Rover is interested in investigating the Macro Element Method, as modelling and simulation time is considerably reduced when compared with Finite Element simulations, but results are still similar. The objective of this document is to assess the quantitative differences between both approaches, identifying the advantages, disadvantages and limitations of the Macro Element Method through the study of the pole side impact test of a full scale vehicle. It is done following an increasing complexity philosophy: simple models were developed first in order to get some preliminary conclusions, and step by step the full scale vehicle was modelled and correlated. According to the results obtained, the Macro Element Method has proved to be a real possibility for automotive companies interested in increasing efficiency during the initial design phase of a Crashworthy Structure.Cuevas Caballero, JM. (2014). Correlation of a fe vehicle with an equivalent macro element model, focused on the us ncap pole side impact test. Universitat Politècnica de València. http://hdl.handle.net/10251/50155Archivo delegad

Guangyong Sun - One of the best experts on this subject based on the ideXlab platform.

  • energy absorption of metal composite and metal composite hybrid Structures under oblique crushing loading
    International Journal of Mechanical Sciences, 2018
    Co-Authors: Guohua Zhu, Guangyong Sun
    Abstract:

    Abstract Metal/composite hybrid Structures, which combine low-density composites with low-cost metallic materials, exhibit considerable potential to provide cost-effective energy-absorbing devices for automotive applications. This study aimed to explore crashworthiness characteristics of aluminum/carbon fiber reinforced plastic (CFRP) hybrid tubes, experimentally and numerically, subjected to three different loading angles by comparing with the aluminum alone and CFRP alone tubes, in which the deformation patterns and several key indicators related to the crashworthiness of these Structures were assessed. The experiments revealed that the CFRP tube has the highest SEA under the axial (37.82 J/g) and 15° loading (30.03 J/g) angles of all the configurations concerned; while the hybrid tube showed the greatest energy absorption. It was found that the energy absorption capacity of all specimens reduced in different extent with increasing loading angle. Specifically, with the loading angle up to 15°, SEA of the hybrid tube decreased by 10.0% from that with the axial loading; whereas SEA of the CFRP tube decreased by 20.6% from that of the axial loading. It means that the hybrid tube was more capable to mitigate the effects of oblique load on energy absorption capacity in comparison with the net CFRP tube. To better understand the crashing mechanism, numerical models were created and validated by the experimental data. A parametric study was further performed to investigate the effects of loading angle, thickness of aluminum layer, stacking sequence and thickness of CFRP layers on crashworthiness of these Structures. It was found that the number of CFRP layers is more important to energy absorption of the hybrid tube. For the pure CFRP tube, there is significant difference between the axial and oblique loading conditions, making it disadvantageous to be a proper Crashworthy Structure. Whereas for the hybrid tube, the effect of loading angle on energy absorption capacity is considerably mitigated; and consequently, the hybrid configuration offers a higher energy absorption capacity for meeting the crashworthiness requirements accommodating complex impacting angles.

A Othman - One of the best experts on this subject based on the ideXlab platform.

  • investigating the crushing behavior of quasi static oblique loading on polymeric foam filled pultruded composite square tubes
    Composites Part B-engineering, 2016
    Co-Authors: A Othman, Shahrum Abdullah, A K Ariffin, Nik Abdullah Nik Mohamed
    Abstract:

    Abstract The behavior of foam-filled core composite is vastly superior as a material in terms of its mechanical and physical properties. The present paper describes the performance of polyurethane (PU) foam as an internally-reinforced filler material on pultruded composite square cross-section tubes made of E-glass/polyester resin and subjected to axial and oblique loading. In this research study, foam-filled core composites of three different wall thicknesses and densities were examined experimentally. The capacity of a Structure to absorb large amounts of energy during crush regimes is a major concern in the design of Crashworthy Structures. Various loads were applied to different angle cross-head platens to assess their energy absorption capacity based on quasi-static load–displacement curves. In addition, the interaction properties of the composite and the foam core sheets during the loadings were discussed. Experimental results indicated that the Crashworthy Structure of the polyurethane (PU) foam-filled specimen enhanced the specific and quasi-static absorbed energies more than the empty composite tubes.

  • on the crushing behavior of foam filled composite tubes under compressive loading
    Advanced Materials Research, 2012
    Co-Authors: A Othman, Shahrum Abdullah, A K Ariffin, Nik Abdullah Nik Mohamed, Helmi Rashid
    Abstract:

    The present papers determine the effect of composite pultrusion square tubes E-glass polyester empty and polymeric foam-filled subjected to axial compressive loading. The specimens of square composite pultrusion were compressed experimentally under axial loadings to examine the effect of empty and polymeric foam-filled with different wall-thickness. The wall-thickness was used in this study were 2.1 and 2.4 mm. During the experimental observation, three characteristic crushing stages were identified as initial peak load, progressive crushing and compaction zone stages. The composite pultrusion square tube profile were analyzed and investigated in terms of crashworthiness parameters to meet the improvement of structural material widely used in automobile, aerospace and marine applications. Result obtained from experimental analysis such that initial peak load, mean load, energy absorption and specific energy absorption versus displacement curves were compared for each specimen. Results showed that the tubes energy absorption was affected significantly by different tube profile. It is also found that the polymeric foam-filled exhibit superb Crashworthy Structure on specific absorbed energy and the amount of initial peak load, mean load and absorbed energy recorded higher than the empty tube profiles.

Guohua Zhu - One of the best experts on this subject based on the ideXlab platform.

  • energy absorption of metal composite and metal composite hybrid Structures under oblique crushing loading
    International Journal of Mechanical Sciences, 2018
    Co-Authors: Guohua Zhu, Guangyong Sun
    Abstract:

    Abstract Metal/composite hybrid Structures, which combine low-density composites with low-cost metallic materials, exhibit considerable potential to provide cost-effective energy-absorbing devices for automotive applications. This study aimed to explore crashworthiness characteristics of aluminum/carbon fiber reinforced plastic (CFRP) hybrid tubes, experimentally and numerically, subjected to three different loading angles by comparing with the aluminum alone and CFRP alone tubes, in which the deformation patterns and several key indicators related to the crashworthiness of these Structures were assessed. The experiments revealed that the CFRP tube has the highest SEA under the axial (37.82 J/g) and 15° loading (30.03 J/g) angles of all the configurations concerned; while the hybrid tube showed the greatest energy absorption. It was found that the energy absorption capacity of all specimens reduced in different extent with increasing loading angle. Specifically, with the loading angle up to 15°, SEA of the hybrid tube decreased by 10.0% from that with the axial loading; whereas SEA of the CFRP tube decreased by 20.6% from that of the axial loading. It means that the hybrid tube was more capable to mitigate the effects of oblique load on energy absorption capacity in comparison with the net CFRP tube. To better understand the crashing mechanism, numerical models were created and validated by the experimental data. A parametric study was further performed to investigate the effects of loading angle, thickness of aluminum layer, stacking sequence and thickness of CFRP layers on crashworthiness of these Structures. It was found that the number of CFRP layers is more important to energy absorption of the hybrid tube. For the pure CFRP tube, there is significant difference between the axial and oblique loading conditions, making it disadvantageous to be a proper Crashworthy Structure. Whereas for the hybrid tube, the effect of loading angle on energy absorption capacity is considerably mitigated; and consequently, the hybrid configuration offers a higher energy absorption capacity for meeting the crashworthiness requirements accommodating complex impacting angles.

Nik Abdullah Nik Mohamed - One of the best experts on this subject based on the ideXlab platform.

  • investigating the crushing behavior of quasi static oblique loading on polymeric foam filled pultruded composite square tubes
    Composites Part B-engineering, 2016
    Co-Authors: A Othman, Shahrum Abdullah, A K Ariffin, Nik Abdullah Nik Mohamed
    Abstract:

    Abstract The behavior of foam-filled core composite is vastly superior as a material in terms of its mechanical and physical properties. The present paper describes the performance of polyurethane (PU) foam as an internally-reinforced filler material on pultruded composite square cross-section tubes made of E-glass/polyester resin and subjected to axial and oblique loading. In this research study, foam-filled core composites of three different wall thicknesses and densities were examined experimentally. The capacity of a Structure to absorb large amounts of energy during crush regimes is a major concern in the design of Crashworthy Structures. Various loads were applied to different angle cross-head platens to assess their energy absorption capacity based on quasi-static load–displacement curves. In addition, the interaction properties of the composite and the foam core sheets during the loadings were discussed. Experimental results indicated that the Crashworthy Structure of the polyurethane (PU) foam-filled specimen enhanced the specific and quasi-static absorbed energies more than the empty composite tubes.

  • on the crushing behavior of foam filled composite tubes under compressive loading
    Advanced Materials Research, 2012
    Co-Authors: A Othman, Shahrum Abdullah, A K Ariffin, Nik Abdullah Nik Mohamed, Helmi Rashid
    Abstract:

    The present papers determine the effect of composite pultrusion square tubes E-glass polyester empty and polymeric foam-filled subjected to axial compressive loading. The specimens of square composite pultrusion were compressed experimentally under axial loadings to examine the effect of empty and polymeric foam-filled with different wall-thickness. The wall-thickness was used in this study were 2.1 and 2.4 mm. During the experimental observation, three characteristic crushing stages were identified as initial peak load, progressive crushing and compaction zone stages. The composite pultrusion square tube profile were analyzed and investigated in terms of crashworthiness parameters to meet the improvement of structural material widely used in automobile, aerospace and marine applications. Result obtained from experimental analysis such that initial peak load, mean load, energy absorption and specific energy absorption versus displacement curves were compared for each specimen. Results showed that the tubes energy absorption was affected significantly by different tube profile. It is also found that the polymeric foam-filled exhibit superb Crashworthy Structure on specific absorbed energy and the amount of initial peak load, mean load and absorbed energy recorded higher than the empty tube profiles.