摘要
Gyroid型三周期极小曲面(TPMS)能够避免局部应力集中现象,有效提高能量吸收性能。为了提升管路系统的能量吸收性能,通过对Gyroid梯度结构的分析,设计了梯度吸能结构,并研究了不同承载角度下梯度Gyroid结构的能量吸收规律。研究表明:轴向梯度Gyroid结构在压溃过程中呈现出分层逐步破坏的特性;相比于均匀Gyroid结构,梯度Gyroid结构提升了其在压缩阶段的平台应力,其结构的比能量吸收性能在0°,15°,30°,45°,60°,75°和90°承载角度时分别提高了1.59%,4.58%,10.74%,30.66%,18.44%,7.75%和1.54%,所有角度的平均比吸能提高了10.67%;梯度Gyroid结构孔隙率线性梯度的变化未对承受压缩载荷时的变形响应造成显著影响;轴向梯度Gyroid结构可保证压溃变形不变的情况下,提高结构的能量吸收能力。
Triply periodic minimal surface(TPMS)of Gyroid structure can avoid localized stress concentration phenomena and effectively improve energy absorption performance.In order to enhance the energy absorption performance of the piping system,by analyzing the gradient Gyroid structure,the gradient energy absorption structure was designed and the energy absorption rule of the gradient Gyroid structure was investigated at different load-bearing angles.The research results show that the axial gradient Gyroid structure exhibites a hierarchical gradual destruction characteristic during the compression collapse process,which elevates its plateform stress in the compression stage compared with the uniform Gyroid structure,thereby increasing the specific energy absorption performance of the structure by 1.59%,4.58%,10.74%,30.66%,18.44%,7.75% and 1.54% at load-bearing angles of 0°,15°,30°,45°,60°,75°and 90°,respectively,and the average specific energy absorption for all angles increases by 10.67%;the change in the linear gradient of the porosity of the gradient Gyroid structure will not significantly affect the deformation response when subjected to compressive loading.Therefore,the axial gradient Gyroid structure can ensure that the energy absorption capacity of the structure can be improved with no change in the compression and collapse deformation.
作者
邱绪哲
李涛
周生俊
何涛
夏阳
吕永涛
QIU Xuzhe;LI Tao;ZHOU Shengjun;HE Tao;XIA Yang;LYU Yongtao(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian,China,Post Code:116024;School of Mechanics and Aerospace Engineering,Dalian University of Technology,Dalian,China,Post Code:116024;CSSC Sunrui(Luoyang)Special Equipment Co.,Ltd.,Luoyang,China,Post Code:471027;Wuhan Second Ship Design and Research Institute,Wuhan,China,Post Code:430205)
出处
《热能动力工程》
北大核心
2025年第6期49-56,共8页
Journal of Engineering for Thermal Energy and Power
基金
热能动力技术重点实验室开放基金资助项目(TPL2022A01)。
关键词
三周期极小曲面
梯度结构
能量吸收
有限元
triply periodic minimal surface(TPMS)
gradient structure
energy absorption
finite element
