超高性能水泥基复合材料动态冲击性能及数值模拟  

Dynamic impact properties and simulation of ultra-high performance of cementitious composites

作　　者：张文华[1] 张云升[2] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《混凝土》2015年第10期60-63,共4页Concrete

基　　金：国家自然科学基金项目(51308302);高温养护条件下现代水泥基材料早期微结构演变及调控机理研究;东南大学土木工程材料重点试验室开放基金(CM2013-05);高性能土木工程材料国家重点实验室开放基金(2013CEM005);南京林业大学高学历人才基金(GXL2013036);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：超高性能水泥基复合材料是一种具有优越的力学性能、耐久性能的新型建筑材料,在超高层建筑、桥梁、隧道、军事防护工程具有广阔的应用前景。利用霍普金森压杆(Split Hopkinson Press Bar,SHPB)对超高性能水泥基复合材料进行动态力学性能的研究,结果发现超高性能水泥基复合材料表现出了明显的应变率效应,即随着加载应变率的增加,应力峰值增加;钢纤维能明显提高试件的抗冲击能力,有利于维持试件的整体完整性。最后,利用有限元分析软件LS-DYNA,对超高性能水泥基复合材料霍普金森压杆冲击压缩试验进行数据模拟。Ultra-high performance of cementitious composites is a new type of the construction material,which own ultra-high strength and durability ultra-high performance of cementitious composites has broad application prospectsin high-rise buildings,bridges, tunnels,military protection works.In this paper, split hopkinson press bar（ SHPB） was used to conduct experimental on ultra-high performance of cementitious composites for dynamic mechanical properties.It was found that ultra-high performance of cementitious composites show significant strain rate effect, that with the increase of strain rate loading,peak stress increases.Steel fibercan significantly improve the specimen anti impact,which maintains the overall integrity of the specimen.Finally, the finite element analysis software LS-DYNA was used for simulation of the impact test.

关 键 词：超高性能水泥基复合材料 动态冲击 LS-DYNA 模拟 

分 类 号：TU528.01[建筑科学—建筑技术科学]