摘要
基于分离式霍普金森压杆实验装置,对船用夹层板系统(SPS)的芯材-聚氨酯弹性体的动态力学性能进行了实验分析。在实验满足一维、均匀性的前提下,计算得到了聚氨酯弹性体在不同应变率下的应力—应变关系,讨论了试样尺寸对结果的影响;考虑聚氨酯弹性体不同于金属的动态力学性能,以及准静态力学性能与动态力学性能的差异,确定运用朱—王—唐(ZWT)方程描述聚氨酯弹性体的本构关系,能够准确反应聚氨酯弹性体的非线性粘弹性特性,拟合结果与实验结果吻合较好。
The dynamic compressive properties of polyurethane elastomer which can be used as core materials of ship sandwich plates system（SPS） were experimentally studied by means of a split Hopkinson pressure bar at high strain rates. On the premise of one dimension and uniformity, the stress-strain relations of polyurethane elastomer are investigated at different strain rates and the effects of specimen size on the results were discussed. A constitutive relation model was proposed for polyurethane elastomer and other viscoelastic plasticity materials by numerical fitting to experimental results based on ZWT nonlinear viscoelastic. The comparison with the experiment results showed the validity of the proposed constitutive relation model.
出处
《船舶力学》
EI
CSCD
北大核心
2015年第7期834-840,共7页
Journal of Ship Mechanics
基金
国家自然科学基金青年基金(E091002/51109101)
江苏科技大学青年骨干教师支持基金
关键词
船用夹层板
聚氨酯弹性体
动态力学性能
本构模型
ship sandwich plate
polyurethane elastomer
dynamic mechanical properties
constitutive relation model
