T型接头蒙皮厚度对Z-pin增强效果的影响  

Influence of skin thickness of T-joint on reinforcing effect of Z-pin

作　　者：李梦佳[1] 陈普会[1] 孔斌[2] 彭涛[2] 姚正兰 邱学仕[2] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]成都飞机设计研究所,成都610091

出　　处：《复合材料学报》2016年第7期1461-1467,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(11572152);江苏高校优势学科建设工程基金

摘　　要：在关于拉脱载荷下Z-pin增强T型接头的有限元模拟方法基础上,通过对2组蒙皮厚度分别为7.2mm和4.0mm的试验件的试验结果进行分析,研究了T型接头蒙皮厚度对Z-pin增强效果的影响。结果表明:Z-pin增强效果随着蒙皮厚度的减小而增大。蒙皮厚度大于5mm,Z-pin不能提高结构的最大承载能力,但可显著提高结构首次掉载后的承载性能,使T型接头在较大的加载位移下仍保持较高的承载能力;无论蒙皮厚薄,结构首次掉载后,各Z-pin增强T型接头可达到的载荷平台是相当的,且该载荷平台随蒙皮的变厚有降低的趋势。This paper is based on the finite element simulation method for Z-pin reinforced T-joints about pull-off load.After the analysis on the test results of specimens with two different skin thicknesses （7.2 mm and 4.0 mm respectively）,influence of skin thickness on the reinforcing effect of Z-pin was studied.Results show that the rein-forcing effect of Z-pin increases as the thickness of skin decreases.When the skin is thicker than 5 mm,Z-pin cannot increase the maximum load-carrying capacity of structure any more,while Z-pin can still enhance the load-carrying performance after the first peak load,thus make the T-joints remain high load-carrying capacity under big load dis-placement.Whatever the thickness of skin is,load plateaus of Z-pin reinforced T-joints after first peak load are al-most the same and the level of load plateau decreases as the thickness of skin increases.

关 键 词：复合材料 T型接头 Z-PIN 蒙皮厚度 有限元模拟 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程] TB332[一般工业技术—材料科学与工程]