Effects of Clearance Fit and Friction Coefficient on Triple-Row Riveted Lap Joints

Li, Gang; Shi, Guoqin; Bellinger, Nicholas C.

doi:10.2514/6.2010-3025

Cited by 6 publications

(11 citation statements)

References 17 publications

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“…Nonlinear material models for both the 2024-T3 aluminum alloy sheets and the 2117-T4 aluminum alloy universal head rivet are the same as ones used in Szolwinski and Farris 3 and Li et al 5,6 which were verified through the copious amounts of studies comparing experimental and numerical force-deflection response during the riveting process. The isotropic hardening behavior was assumed for the rivet and sheet materials with rate effects, which used power hardening rule, with the following equation…”

Section: Materials Modelingmentioning

confidence: 99%

“…Residual stress induced by the expanding the rivet against the rivet hole's inner wall varies with several manufacturing parameters. Li et al 5,6 studied the effect of clearance between the rivet shank and the rivet hole, which is induced by manufacturing processes. Their results indicated that a small increase in the clearance considerably changed the driven rivet head dimensions.…”

Section: And Farris 3 Extendedmentioning

confidence: 99%

“…Models III and IV presented in equations (6) and 7, respectively, were used to identify the feasible region resulting from the combination of X 1 , X 2 , X 3 , and X 4 while satisfying the quality requirements previously defined. Overlay plots of feasible regions were used for this purpose.…”

Section: The Feasible Regions Of Riveting Parameters Searching For Fementioning

confidence: 99%

“…Taking the feasible region H3 , for example, the plan enveloping surfaces are determined by both the upper and the lower boundary of the variables X 1 , X 2 , and X 3 defined in Table 14. The corresponding curved enveloping surfaces are defined by equation (6) when H is equal to 1.9844 mm and 3.175 mm (minimum and maximum allowable value of H, respectively) as shown in Figure 8(b). Figure 9 illustrates the feasible region D .…”

Section: The Feasible Regions Of Riveting Parameters Searching For Fementioning

confidence: 99%

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Riveting parameter design that satisfies requirements for driven rivet head dimensions

Wang

Liu

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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Riveted joints are extensively adopted in designing aircraft structures. Riveting implies a squeezing process of the rivet with large plastic deformations to form the driven rivet head. The driven rivet head dimensions (height H, diameter D) depend on riveting force (X 1 ), rivet length and diameter tolerance (X 2 and X 3 ), as well as rivet hole tolerance (X 4 ). Incorrect selection in these parameters could induce the excessive stress concentration that results in initial crack and also results in improper rivet head deformation leading to loose rivet. The present research is conducted on a MS2047AD6-6 rivet and 2.286 mm thick aluminum alloy sheets and mainly focuses on the design of riveting parameters X 1 , X 2 , X 3 , and X 4 using the proposed three-step statistical experiment designs including fractional factorial design, steepest ascent design, and central composite design while satisfying the quality requirements for driven rivet head dimensions (H, D) mentioned in Standard Aircraft Handbook. Fractional factorial design is used to evaluate the impact of riveting parameters X 1 , X 2 , X 3 , and X 4 on H and D. Based on the effective ranges of the significant riveting parameters obtained from steepest ascent design, a five-level central composite design is proposed to derive the statistical relations between H, D and the significant riveting parameters, and the statistical models are used to find the feasible region resulting from the combination of the significant riveting parameters while satisfying the quality requirements for H and D. Finally, the feasible ranges of X 1 , X 2 , X 3 , and X 4 , namely [16,470 N 22,730 N], [À0.1491 mm 0.3891 mm], [À0.0466 mm 0.1216 mm], and [À0.0375 mm 0.2125 mm], are determined from the perspective of adjustable accuracy of X 1 and that of the manufacturability for X 2 , X 3 , and X 4 . It implies that any combination of X 1 , X 2 , X 3 , and X 4 that falls within this feasible region can result in a good quality riveted joins, namely that the quality requirements for the driven riveting head dimension (H, D) can be satisfied.

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Section: Materials Modelingmentioning

confidence: 99%

Section: And Farris 3 Extendedmentioning

confidence: 99%

Section: The Feasible Regions Of Riveting Parameters Searching For Fementioning

confidence: 99%

Section: The Feasible Regions Of Riveting Parameters Searching For Fementioning

confidence: 99%

See 2 more Smart Citations

Riveting parameter design that satisfies requirements for driven rivet head dimensions

Wang

Liu

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Szolwinski and Farris 3 analyzed a non-countersunk model and observed that greater squeeze force pushed the zone of tensile hoop stress away from the hole and also obtained an increased fatigue life. Li et al [4][5][6] and Rans et al 7,8 conducted numerical and experimental studies on the residual stress/strain after rivet installed and also had a further consideration of the stress variation under the tensile load and found that installation force played a significant role on fatigue behavior of riveted lap joints. Atre et al 9,10 and Cheraghi 11 utilized the finite element (FE) model to conduct parametric studies on the effects of varying hole clearance, misaligned holes, the presence of debris, skin defects, friction, applied rivet displacement, and sealant on the residual stress state in riveted lap joints.…”

Section: Introductionmentioning

confidence: 99%

Effects of squeeze force on static behavior of riveted lap joints

Huan

Liu

2017

Advances in Mechanical Engineering

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To study the effects of the squeeze force used in the rivet installing process on structural behavior of the riveted lap joints, three-stage finite element simulation and workshop experiment of single-row countersunk riveted lap joints were implemented. Force-displacement curves and explicit configuration after various processes were obtained from both methods. Additionally, stress/strain fields were obtained from finite element analysis, and strain values at specific positions were measured by micro strain gauge during the experiment. Based on the consistency of the results, stresses on the edge of dangerous holes, load transmission, and secondary bending of joints under tensile load were analyzed. The result shows that increasing squeeze force does not have a significant influence on joint stiffness but results in a slight decrease in joint strength. Greater squeeze force introduces greater residual stress around the hole, and the maximum principal stress around the hole becomes greater tensile stress instead of initial compressive stress introduced by riveting process, thus causes weaker static strength. It is also shown that under static load, breakage occurs in the outer sheet at the end hole due to the largest load transmission and secondary bending, whereas these two aspects not only depend on the rivet installation squeeze force but also depend on the size of the exterior tensile load.

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