Abstract
Many previous studies have mainly focused on the effects of riveting parameters on single-row riveted lap joints. Little attention has been paid to multi-row riveted lap joints. The outer rows of a normal multi-row riveted lap joint usually bear a larger part of the tensile load. However, none of the studies relate the phenomenon to the squeezing displacement combination of a multi-row riveted lap joint. To improve the performance of a three-row riveted lap joint, this paper aims to reveal the internal relation between tensile load distribution, structural deformation and squeezing displacement combination. Theoretical discussion, numerical simulation and an experimental test have been conducted. Four different squeezing displacement combinations have been studied. The result indicates that an appropriate squeezing displacement combination can effectively make tensile load distribution more homogeneous. Each rivet can take approximately 33% tensile load. Structural deformation magnitude can be reduced as well. Compared with the worst situation, at the region most sensitive to tensile load, the max strain value can reduce about 53.22–79.76%. A suitable squeeze displacement combination is a simple approach for the performance enhancement of a three-row riveted lap joint. It can be practically applied in aircraft manufacturing without any additional equipment or skill learning.
Highlights
The riveted lap joint is an effective and important connection mode to permanently fasten aircraft structures
The Aloha Airlines accident in 1988 has warned aircraft manufacturers and researchers of the continuing need to improve the performance of a riveted lap joint
Compared with single-row riveted lap joints, fewer studies focus on multi-row riveted lap joints
Summary
The riveted lap joint is an effective and important connection mode to permanently fasten aircraft structures. A representative connection mode in pressurized aircraft fuselage is the three-row riveted lap joint [2]. The tensile load distribution among rivet rows is not homogeneous, especially when a riveted lap joint has more than two rows. Lap riveted lap joints was remaArkmabolnyginscturedaiseesd, laitfttleeraitntternotdiouncihnagstbheeelnappaaindglteo ianntoaltyhzeinfgaytihnegisnuflrufaecnec.e of different squeAezminogndgissptuladcieems, elintttlceoamttbeinntaiotinonhsaos nbeteennspilaeildoatod atrnaanlysmziinsgsiothneoifnaflumeunlctei-roofwdirfifveerteendt slaqpuejoeiznint.g displacement combinations on tensile load transmission of a multi-row riveted lap joSinqtu.eezing displacement is one of the most important riveting parameters. NAthlaergotehresrqhuaenedz,incgomdpisaprleadcewmitehnot tchaenr process parameters, squeezing displacement is a simple and controllable parameter It can be applied in aircraft manufacturing without any additional equipment. On the other hand, compared with o3 tohf e14r process parameters, squeezing displacement is a simple and controllable parameter TThhee rreesseeaarrcchh iinn tthhiiss ppaappeerr iiss hheellppffuull iinn eeffffeeccttiivveellyy iimmpprroovviinngg tthhee performance of three-row riveted lap joints
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