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自动铺丝末端缺陷角度对层合板拉伸性能的影响
丰亮宽1,2,杨涛1,2,杜宇2,李韦清2,原文慧2
1.天津市现代机电装备技术重点实验室,天津 300387;2.天津工业大学机械工程学院,天津 300387
摘要:
自动纤维铺放(AFP)工艺能够有效制造大型复合材料构件,但在铺放过程中因为丝束末端等断面而出现不同角度内嵌缺陷。为解决相关问题,按照[(90°/0°)5/90°]和[(0°/90°)5/0°]的铺层顺序,在0°和90°铺层内分别设置不同丝束末端角度的孔隙缺陷或重叠缺陷。结果表明:不同角度纤维铺层内嵌不同角度缺陷时,导致复合材料构件差异明显。在90°纤维铺层方向上,内嵌90°孔隙缺陷和90°重叠缺陷时,试件拉伸强度最高,拉伸强度比分别为90.89%和90.11%。在0°纤维铺层方向上,内嵌±30°孔隙缺陷和30°重叠缺陷时,试件拉伸强度最高,拉伸强度比分别为28.48%和50.71%。
关键词:  复合材料  自动铺放技术  缺陷  力学性能
DOI:10.12044/j.issn.1007-2330.2020.03.011
分类号:V258
基金项目:天津市应用基础与前沿技术研究计划重点项目(11JCZDJC23000)
Influence of Defect Angle at the End of Tows on the Tensile Properties of Laminates by Automated Placement
FENG Liangkuan1,2, YANG Tao1,2, DU Yu2, LI Weiqing2, YUAN Wenhui2
1.Advanced Mechatronics Equipment Technology Tianjin Area Major Laboratory,Tianjin 300387;2.School of Mechanical Engineering,Tianjin Polytechnic University,Tianjin 300387
Abstract:
Automatic fiber placement (AFP) technology could manufacture large composite components effectively,but there are different angle embedded defects due to the same cross-section at the end of the tow in the process of placement.In order to solve the related problems,according to the laying sequence of [(90°/0°)5/90°] and [(0°/90°)5/0°],the gap defects or overlapping defects with different end angles of the tow were set in the 0° and 90° laying sequence respectively.The experimental results show that the difference of the composite components is obvious when the defects are embedded in different angles.In the direction of 90° fiber layer,when 90° void defect and 90° overlapping defect are embedded, the tensile strength of the specimen is the highest,and the tensile strength ratio is 90.89% and 90.11%,respectively.In the direction of 0° fiber layer,the tensile strength of the specimen is the highest when embedded with ± 30° gap defect and 30° overlapping defect,and the tensile strength ratio is 28.48% and 50.71% respectively.
Key words:  Composites  Automated fiber placement  Defects  Mechanical property