欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
高孔隙率泡沫铝芯体三明治板具有轻质、高比刚度和减振吸能等优良的力学特性和物理特性,被广泛地应用于碰撞吸能部件上.近年来,高孔隙率泡沫铝在动态压缩下是否具有应变率敏感性成为广大学者的研究焦点.论文建立了横观各向同性率相关本构模型来描述高孔隙率泡沫铝的应变率效应,给出了有限元的计算步骤,基于ABAQUS/Explicit平台开发了子程序VUMAT,并在单个单元模型中验证了计算结果的稳定性和可靠性.将其作为三明治板芯体的材料属性,研究了不同率敏感系数对整个结构冲击吸能能力的影响.结果表明,随着率敏感系数的增加,芯体吸收的能量也随之增加,而底面面板的变形会越小,再一次验证了该子程序可以用来描述泡沫铝的应变率效应.采用该率相关模型及其子程序VUMAT,可以对泡沫铝夹芯三明治板的冲击力学特性进行很好的有限元模拟,对工程实际应用具有一定的指导意义.
英文摘要：
Aluminum foam sandwich structures with the excellent mechanical and physical properties as lightweight,high specific stiffness and strength,vibration damping and energy absorption,have been wildly applied in the energy absorption device under impact.In this paper,a transverse isotropic rate-dependent constitutive model for aluminum foams has been developed for the strain rate sensitive behavior of the foams.Numerical algorithm for computing the rate-dependent constitutive model in finite element method is presented and has been coded into the commercial software package ABAQUS/Explicit through the user subroutine interface VUMAT.The numerical stability and reliability of the code are verified using a single element model and compared to available experimental results.The implemented model is then used to study the energy absorption capacity of aluminum foam core sandwich panels subject to impact loading.The effect of strain rate of the foam core is explored.Obtained results show that,with the increase of rate sensitivity parameter the energy capacity of the foam core increases and the deformation of the bottom panel decreases.
同期刊论文项目
同项目期刊论文
Phonon-polariton and band structure of electro-magneto-acoustic SH wave propagation oblique to the p
Three dimensional phase field study on the thickness effect of ferroelectric polymer thin film. Theo
Tuning the locally resonant phononic band structures of two-dimensional periodic electroactive compo
On the finite element tearing and interconnecting method for scattering by large 3D inhomogeneous ta
Influence of in-plane biaxial stress on the structural properties, ferroelectric response, and piezo
Design method for quasi-isotropic transformation materials based on inverse Laplace';s equation with
Effect of epitaxial strain on the properties of short-period BaTiO3/PbTiO3 superlattice from first-p
An efficient twofold iterative algorithm of FE-BI-MLFMA using multilevel inversebased ILU preconditi
PARALLEL HIGH-ORDER FE-BI-MLFMA FOR SCATTERING BY LARGE AND DEEP COATED CAVITIES LOADED WITH OBSTACL
Hybrid h- and p-Type Multiplicative Schwarz (h-p-MUS) Preconditioned Algorithm of Higher-Order FE-BI
期刊信息
位置：