摘要
针对敷设于舰船壳体具有抗冲击能力的超弹性橡胶覆盖层,利用显示动力学有限元ABAQUS/Explicit建立四韧带反手性蜂窝覆盖层面内冲击计算模型。选择合适本构模型对非线性材料试验数据拟合确定参数,分析了不同加载速度下的覆盖层变形特征、动力学响应和比吸能。结果表明:在中、低速冲击下,反手性蜂窝橡胶材料表现出旋转变形机制的负泊松比特性,且随冲击速度增大,惯性效应显著。随冲击速度增大和壁厚增加,冲击端压力和支反力增大,同时能量吸收能力提高。相关结果可对反手性蜂窝覆盖层的设计提供参考。
For the hyperelastic rubber claddings with impact resistance laid on the hull of a ship,the in-plane dynamic crushing behaviors of anti-tetrachiral honeycombs were numerically studied by explicit dynamic finite element simulations using ABAQUS/Explicit.Nonlinear rubber test data were fitted with the models in ABAQUS.Then,a proper model was chosen.The deformation characteristic,dynamic response and specific energy absorption under different loading speeds are analyzed.The results show that:when the velocity is low or moderate,the anti-chiral honeycombs display negative Poisson’s ratio characteristic showing the mechanism of rotation deformation.With the increase of impact velocity,the inertial effect of the overlay is remarkable.With the increase of impact velocity and wall thickness,the impact end stress and reaction force increase,while the energy absorption capacity increases.The results provide a reference for the design of anti-chiral honeycomb claddings.
作者
李俊杰
陶猛
LI Jun-jie;TAO Meng(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang550025,China)
出处
《机械设计与制造》
北大核心
2020年第11期9-13,共5页
Machinery Design & Manufacture
基金
国家自然科学基金(51765008,51365007)
贵州省高层次创新型人才培养项目(黔科合人才[2016]4033号)。
关键词
四韧带反手性蜂窝
超弹性橡胶覆盖层
负泊松比
变形特征
比吸能
Anti-Tetrachiral Honeycomb
Hyperelastic Rubber Claddings
Negative Poisson’s Ratio
Deformation Characteristic
Specific Energy Absorption
