The Experts below are selected from a list of 1476 Experts worldwide ranked by ideXlab platform

Jun Beom Kwon - One of the best experts on this subject based on the ideXlab platform.

  • Crashworthiness of aluminum cfrp square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Dong-kil Shin, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

  • Crashworthiness of aluminum cfrp square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Dong-kil Shin, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

  • Crashworthiness of aluminum/CFRP square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Hee Chul Kim, Dong-kil Shin, Jung Ju Lee, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

Peixing Wei - One of the best experts on this subject based on the ideXlab platform.

  • experimental and numerical study on the energy absorption abilities of trabecular honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2019
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.

  • Experimental and numerical study on the energy absorption abilities of trabecular–honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2018
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.

Dong-kil Shin - One of the best experts on this subject based on the ideXlab platform.

  • Crashworthiness of aluminum cfrp square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Dong-kil Shin, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

  • Crashworthiness of aluminum cfrp square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Dong-kil Shin, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

  • Crashworthiness of aluminum/CFRP square hollow section beam under axial impact loading for Crash Box application
    Composite Structures, 2014
    Co-Authors: Hee Chul Kim, Dong-kil Shin, Jung Ju Lee, Jun Beom Kwon
    Abstract:

    Abstract Crashworthiness characteristics and axial collapse with damage propagation behavior of an aluminum/CFRP hybrid square hollow section beam were investigated under dynamic axial crushing load for Crash Box application. The low speed impact test referred to the RCAR regulations was performed with five different lay-up sequences and two different laminate thicknesses. Both tip ends of hybrid specimen were clamped by a specially designed jig to assign a similar boundary condition with an auto-body Crash test model. Each different direction of carbon fibers offers respective Crashworthiness characteristics, and the characteristics from each direction were mixed when stacked together. The specific energy absorbed and crush force efficiency were improved simultaneously up to 38% and 30%, respectively in the Al/CFRP hybrid SHS beam with a [0°/90°] 2 n lay-up sequence, and they were slightly improved by increasing the thickness of the CFRP laminate.

Longcheng Pan - One of the best experts on this subject based on the ideXlab platform.

  • Experimental verification and optimization research on the energy absorption abilities of beetle elytron plate Crash Boxes
    Materials Research Express, 2019
    Co-Authors: Xiaoming Zhang, Jinxiang Chen, Longcheng Pan
    Abstract:

    To develop a new type of biomimetic sandwich plate Crash Box inspired by beetle elytra (referred to as the beetle elytron plate (BEP) Crash Box) with a better energy absorption capability, we conducted experimental verification and optimization research on two methods proposed in our previous studies: changing the amplitude (A) of the deformation leading line predicted by the finite element method and setting the trabeculae in the middle of the honeycomb walls. The following results were determined. 1) The method of increasing A to reduce the peak force of the BEP Crash Box is effective, whereas the latter method is invalid. 2) The latter method is invalid because the unit structure (the BEP Crash Box) is different from the multivariate structure (the BEP) used to determine the prediction due to the change of constraint condition on the trabeculae provided by the honeycomb walls. 3) An optimum A of 1.0 is proposed for BEP Crash Boxes with better energy absorption abilities and more stable successively laminated deformation. Specifically, the main peak force of the BEP Crash Box is approximately the same as that of the conventional one, while the structural energy absorption (SEA) and load uniformity (LU) of BEP Crash Boxes are at least 3 times and between only one-third and one-fourth those of conventional Crash Box, meaning that BEP Crash Boxes can be directly used to replace conventional one and to significantly improve security. Thus, these results provide an experimental basis for further research on BEP Crash Boxes.

  • experimental and numerical study on the energy absorption abilities of trabecular honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2019
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.

  • Experimental and numerical study on the energy absorption abilities of trabecular–honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2018
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.

Jinxiang Chen - One of the best experts on this subject based on the ideXlab platform.

  • Experimental verification and optimization research on the energy absorption abilities of beetle elytron plate Crash Boxes
    Materials Research Express, 2019
    Co-Authors: Xiaoming Zhang, Jinxiang Chen, Longcheng Pan
    Abstract:

    To develop a new type of biomimetic sandwich plate Crash Box inspired by beetle elytra (referred to as the beetle elytron plate (BEP) Crash Box) with a better energy absorption capability, we conducted experimental verification and optimization research on two methods proposed in our previous studies: changing the amplitude (A) of the deformation leading line predicted by the finite element method and setting the trabeculae in the middle of the honeycomb walls. The following results were determined. 1) The method of increasing A to reduce the peak force of the BEP Crash Box is effective, whereas the latter method is invalid. 2) The latter method is invalid because the unit structure (the BEP Crash Box) is different from the multivariate structure (the BEP) used to determine the prediction due to the change of constraint condition on the trabeculae provided by the honeycomb walls. 3) An optimum A of 1.0 is proposed for BEP Crash Boxes with better energy absorption abilities and more stable successively laminated deformation. Specifically, the main peak force of the BEP Crash Box is approximately the same as that of the conventional one, while the structural energy absorption (SEA) and load uniformity (LU) of BEP Crash Boxes are at least 3 times and between only one-third and one-fourth those of conventional Crash Box, meaning that BEP Crash Boxes can be directly used to replace conventional one and to significantly improve security. Thus, these results provide an experimental basis for further research on BEP Crash Boxes.

  • experimental and numerical study on the energy absorption abilities of trabecular honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2019
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.

  • Experimental and numerical study on the energy absorption abilities of trabecular–honeycomb biomimetic structures inspired by beetle elytra
    Journal of Materials Science, 2018
    Co-Authors: Longcheng Pan, Jinxiang Chen, Xiaoming Zhang, Peixing Wei
    Abstract:

    This study proposes a type of trabecular–honeycomb biomimetic structures with high-efficiency energy-absorbing abilities inspired by beetle elytra. Because the trabecular structure is distributed at the ends of the honeycomb walls, the proposed structure is named an end-trabecular beetle elytron plate Crash Box, or EBEP Crash Box for simplification. A comparison between the EBEP Crash Box and conventional Crash Box (a buffering structure generally used in modern devices and vehicles) is conducted using compression experiments and finite element method. We present the following results. (1) In contrast to the fluctuation stage with a low force in a conventional Crash Box, the force–displacement curve of the EBEP Crash Box possesses a rising stage and an approximate plateau with a higher force; as a result, the absorbing energy ability and compression force efficiency are 5 and 2.6 times greater than those of a conventional Crash Box, respectively. (2) Experimental and numerical comparisons reveal that there is cracking failure in the conventional Crash Box; however, the coordinated and uniform S-typed laminated compression deformation is developed in the EBEP Crash Box. (3) The influences of the amplitude (A) of the sine wave deformation line on the peak force and the compression force efficiency of the EBEP Crash Box are investigated, thereby providing a feasible method for adjusting the peak force according to different engineering requirements. These results provide new inspiration for applying EBEP Crash Boxes and exploiting new buffering structures and materials in the energy-absorbing field.