中山大学学报（自然科学版）（中英文）2025，Vol.64Issue(5)：35-42,8.DOI:10.13471/j.cnki.acta.snus.ZR20250049
端面粘接条件下的软材料动态力学行为
Dynamic mechanical behavior of soft materials under end-bonded conditions
摘要
Abstract
The experimental characterization of dynamic mechanical responses under complex stress states is crucial for engineering materials.In composite loading experiments,uniaxial compression testing requires minimal interfacial friction between the specimen and the loading surface to ensure the accuracy of stress measurement,while shear/torsion loading necessitates strong interfacial constraints to effectively transmit the load.For soft materials with low elastic modulus and high poisson's ratio(such as silicone rubber and hydrogels),this incompatibility of interfacial constraint conditions is particularly prominent,and the resulting systematic errors can reach a magnitude comparable to the intrinsic mechanical response of the material.Based on the split Hopkinson pressure bar experimental platform,this paper investigates the influence of end-boned constraints on the dynamic mechanical behavior of silicone rubber.The experimental results showed that specimens under end-bonded conditions exhibit significantly enhanced apparent stress amplitudes,with this strengthening effect intensifying as the specimen's aspect ratio increases.To effectively eliminate the measurement deviation introduced by end-bonding,three correction theories were compared.The analysis found that all three correction methods could effectively eliminate the pseudo-size effect caused by friction interference within a certain strain range and showed good correction effects.However,during large-strain stages of specimens with greater diameters,correction deviations occur across all three linear friction correction models,likely attributable to material accumulation at contact interfaces inducing significant changes in frictional conditions.关键词
软材料/霍普金森压杆/动态压缩/端面约束/应力修正Key words
soft materials/split Hopkinson pressure bar/dynamic compression/end constraint/stress correction分类
数理科学引用本文复制引用
周佳銮,张泳柔,尹梓霁,胡玲玲..端面粘接条件下的软材料动态力学行为[J].中山大学学报（自然科学版）（中英文）,2025,64(5):35-42,8.基金项目
国家自然科学基金(12172388) （12172388）
