三维编织复合材料弹道侵彻准细观层次有限元计算  

FINITE ELEMENT CALCULATION OF A 3-D BRAIDED COMPOSITE UNDER BALLISTIC PENETRATION AT QUASI-MICROSTRUCTURE HIERARCHY

作　　者：顾伯洪[1] 徐静怡[1] 

机构地区：[1]东华大学纺织学院,上海200051

出　　处：《复合材料学报》2004年第3期84-90,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(19902016);教育部科学研究重点项目(重点02108)

摘　　要：　三维编织复合材料相比于层合复合材料有较高的层间剪切强度和断裂韧性,因而具有更高的冲击损伤容限。用钢芯弹对三维编织复合材料作弹道贯穿测试,得到弹体的入射速度和剩余速度,并考察侵彻破坏模式。目前对三维编织复合材料弹道侵彻性能计算主要建立在连续介质假设上,从真实细观结构计算三维编织复合材料弹道冲击性能尚有一定难度,用三维结构复合材料的纤维倾斜模型在准细观结构层次上分解三维编织复合材料,就其中的一块倾斜单向板作弹道侵彻有限元计算,由弹体动能损失得到贯穿整个复合材料靶体后弹体的剩余速度。有限元计算及与弹道测试结果的比较证明在准细观层次上计算三维编织复合材料弹道冲击性能的有效性。Compared to laminated composites, three-dimensional braided composites have higher inter-laminated shear strength and fracture toughness. The impact damage tolerance of a 3-D braided composite is higher than that of the laminated composite. The 3-D braided composite was perforated by a steel core projectile. The strike velocities and residual velocities of the projectile were measured, and the failure mode of the composite under ballistic impact was also investigated. All of the works on analysis and calculation of ballistic penetration of the 3-D braided composite so far were based on continuum assumption. It is still difficult to model the 3-D braided composite under ballistic impact from actual microstructure now. A fiber inclination model for the 3-D structural reinforced composite is employed to decompose it at quasi-microstructure hierarchy. The ballistic penetration property of one of the inclined laminae is calculated with FEM code. The residual velocity of the projectile that perforated the entire 3-D braided composite is obtained from the loss of kinetic energy of the projectile. From the simulation of ballistic penetration process and comparison between numerical results and experimental results, it proves that the analysis scheme of quasi-microstructure hierarchy in this paper is valid and reasonable.

关 键 词：三维编织复合材料 纤维倾斜模型 有限元 弹道侵彻与贯穿 

分 类 号：TB330.1[一般工业技术—材料科学与工程] TM25[电气工程—电工理论与新技术]