准静态压痕作用下复合材料层合板损伤阻抗与损伤容限实验研究  

EXPERIMENTAL STUDY ON DAMAGE RESISTANCE AND DAMAGE TOLERANCE OF COMPOSITE LAMINATES SUBJECTED TO QUASI-STATIC INDENTATION

作　　者：张维[1] 李文晓[2] 万春华[1] 

机构地区：[1]中国飞机强度研究所,西安710065 [2]同济大学航空航天与力学学院,上海200092

出　　处：《玻璃钢／复合材料》2017年第8期88-91,共4页Fiber Reinforced Plastics/Composites

摘　　要：参照标准实验方法,开展了复合材料层合板对准静态压痕力的损伤阻抗和损伤容限实验研究,获取了接触力、压痕深度、压头位移等实验数据,并对含静压痕损伤层合板进行了剩余压缩强度试验。研究了压痕深度-接触力与剩余压缩强度-压痕深度的变化关系,并讨论了准静态压痕过程中的损伤演变过程和层合板的压缩破坏模式。结果表明:当层合板表面出现目视勉强可见压痕时,初始损伤发生,压痕深度随接触力增大而明显增大,同时剩余压缩强度随压痕深度增加而明显降低;当达到最大接触力时,层合板失去承载能力,背面可看到大量纤维断裂。对于含静压痕损伤的层合板,压缩破坏模式为贯穿损伤区域的层合板断裂。According to the standard test method,damage resistance and damage tolerance of composite laminates subjected to quasi-static indentation are studied.Test data such as contact force,indentation depth and indenter displacement are obtained and compressive residual strength of damaged laminates are tested.The relationship between indentation depth vs contact force and residual compressive strength vs indentation depth are studied,damage process subjected to quasi-static indentation and failure pattern under compression are also discussed.The results reveal that initial damage occurs when barely visible indentation can be seen on the surface of laminates.Indentation depth augments obviously as the contact force increases,while the residual compressive strength descends rapidly with the increasing of indentation depth.When the contact force reaches to the maximum value,load-carrying capacity has lost,and large amount of fiber breakage can be seen on the back surface.For laminates with the quasi-static indentation damage,compressive failure pattern is laminates fracture through the damage zone.

关 键 词：准静态压痕 复合材料层合板 损伤阻抗 损伤容限 

分 类 号：TB332[一般工业技术—材料科学与工程]