Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Energy absorption mechanics for variable thickness thin-walled structures
AbstractThis paper introduces axial functionally graded thickness (AFGT) and lateral functionally graded thickness (LFGT) to thin-walled square structures separately, and then investigates their crashworthiness theoretically, numerically, experimentally under axial crushing load. The quasi-static axial crush experiments and the corresponding finite element models are first conducted to analysis the deformation mode and crushing force for uniform thickness (UT), AFGT and LFGT square tube under the same mass. Then, theoretical models predicting the mean crushing forces of AFGT and LFGT square tubes are established. The results show that both theoretical solutions and numerical results for FGT tubes agree well with the experimental results. Energy absorption characteristics between FGT and UT square tubes with same mass are compared based on the validated numerical models, which shows that AFGT square tube can effectively reduce the initial peak force compared to UT square tube while LFGT square tube remarkably surpasses the UT square tube in specific energy absorption (SEA) under axial crushing. Furthermore, parametric studies are performed to investigate the effects of gradient thickness variation on the energy absorption characteristics of AFGT and LFGT square tubes. The results again demonstrate that both AFGT and LFGT square tubes can improve the crashworthiness of thin-walled square tubes.
HighlightsSquare tubes with axial and lateral functionally graded thickness are studied.Theoretical derivation on the MCF of AFGT and LFGT tubes are performed.Theoretical and experimental results on the MCF show good agreement.Numerical study on tubes with graded thickness shows improved crashworthiness absorption.
Energy absorption mechanics for variable thickness thin-walled structures
AbstractThis paper introduces axial functionally graded thickness (AFGT) and lateral functionally graded thickness (LFGT) to thin-walled square structures separately, and then investigates their crashworthiness theoretically, numerically, experimentally under axial crushing load. The quasi-static axial crush experiments and the corresponding finite element models are first conducted to analysis the deformation mode and crushing force for uniform thickness (UT), AFGT and LFGT square tube under the same mass. Then, theoretical models predicting the mean crushing forces of AFGT and LFGT square tubes are established. The results show that both theoretical solutions and numerical results for FGT tubes agree well with the experimental results. Energy absorption characteristics between FGT and UT square tubes with same mass are compared based on the validated numerical models, which shows that AFGT square tube can effectively reduce the initial peak force compared to UT square tube while LFGT square tube remarkably surpasses the UT square tube in specific energy absorption (SEA) under axial crushing. Furthermore, parametric studies are performed to investigate the effects of gradient thickness variation on the energy absorption characteristics of AFGT and LFGT square tubes. The results again demonstrate that both AFGT and LFGT square tubes can improve the crashworthiness of thin-walled square tubes.
HighlightsSquare tubes with axial and lateral functionally graded thickness are studied.Theoretical derivation on the MCF of AFGT and LFGT tubes are performed.Theoretical and experimental results on the MCF show good agreement.Numerical study on tubes with graded thickness shows improved crashworthiness absorption.
Energy absorption mechanics for variable thickness thin-walled structures
Sun, Guangyong (Autor:in) / Pang, Tong (Autor:in) / Xu, Chenglong (Autor:in) / Zheng, Gang (Autor:in) / Song, Jie (Autor:in)
Thin-Walled Structures ; 118 ; 214-228
04.04.2017
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Buckling Analysis of Thin-Walled Members with Variable Thickness
| Online Contents | 1995
Buckling Analysis of Thin-Walled Members with Variable Thickness
| British Library Online Contents | 1995