Numerical Analysis of the Loading-deformation Curve for the Rivet of Lap Metallic Joints by Using FEM
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摘要: 铆钉的柔度是飞机结构强度分析中重要的量,工程中常用载荷变形曲线(简称p-δ曲线)来度量。详细地研究了铆钉p-δ曲线有限元非线性数值分析方法,提出了计算p-δ曲线力学模型和三维有限元建模分析方法,模型考虑了铆钉与钉孔的接触及摩擦。利用有限元模型,研究了不同摩擦系数以及板厚对曲线的影响。为了确认模型的可靠性和分析结果正确性,同试验数据进行比较,结果显示计算结果与试验结果一致性良好,说明分析模型合理可靠。提出的力学模型和有限元模型化方法可以用于对其它型号铆钉p-δ曲线数值分析。Abstract: The rivet flexibility is an important quantity in the aircraft structure strength analysis,which is measured by the loading-deformation curve(p-δ curve for short) in practice. The p-δ curve for the rivet of lap metallic joints is investigated by using FEM. First,the mechanic model for analyzing the rivet deformation is proposed,in which the contact and friction of the rivet with rivet hole are considered. Then the influence of the different friction coefficients and metallic panel thicknesses on the rivet deformation is carried out. Finally,the model is validated by comparing the calculated with the testing results. It shows that both results agree well,which verifies that the present finite element model is reasonable and reliable. The present modeling can be used to analyze the p-δ curve for the other type of rivet.
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Key words:
- ABAQUS /
- calculations /
- computer simulation /
- deformation
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