三维机织复合材料纱线束截面变形研究  

Study on tow cross-section deformation in three-dimensional woven composites

作　　者：杨连贺[1] 李姜[1] 

机构地区：[1]天津工业大学计算机学院,天津300160

出　　处：《复合材料学报》2008年第4期198-204,共7页Acta Materiae Compositae Sinica

基　　金：天津市自然科学基金(033602611)

摘　　要：基于经典的双凸模型,采用正负预重叠法,结合可视化技术,研究了三维机织复合材料纱线截面的变形规律,提出了"凹凸交变模型",导出了截面变形函数。研究结果表明,纱线束截面沿纱线长度方向按凹凸交变的规律呈周期性变化。这一研究成果修正了一直以来的恒定截面假设,使截面研究有了新的进展。Based on the classical lenticular model, with a positive-negative-pre-overlap method, combined with visualization technology, the cross-section deformation rule is studied in this paper. ＂Concave convex alternate model＂ is presented and its mathematical function is deduced. The research shows that the tow＇s concave cross-section alternates with the convex one periodically in length. The classical ＂invariant cross-section assumption＂ is amended, which has dominated the academic world for many years. A breakthrough has been made in the cross- section research.

关 键 词：3D机织复合材料 纤维束截面变形 凹凸交变模型 体重建 正负预重叠法 有限元分析 纱态 

分 类 号：V258[一般工业技术—材料科学与工程] TB330.1[航空宇航科学与技术—航空宇航制造工程]