T型接头蒙皮厚度对Z-pin增强效果的影响

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7.2 mm和4.0 mm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5 mm，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。 

Influence of skin thickness of T-j oint on reinforcing effect of Z-pin

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.