Comparative Behavior of Single-Bolted and Dual-Bolted Lap Joints

Pratt, John D.; Pardoen, Gerard C.

doi:10.1061/(asce)0893-1321(2002)15:2(55)

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…20 There are many factors which affect their carrying capacities. The influences of various initial preloads, 31,35,[37][38][39] bolthole clearances, 27 connections thickness, 16,40,41 material stiffness, 25,26,[36][37][38] geometries 32 and assembly gaps, 25,42 even friction coefficients 25,32 should be carefully considered for a reliable connection design. Firstly, a large number of results indicate that the proper bolt preload is the key factor for the carrying capacity of connection.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling on load bearing and bypass behavior of bolted single lap joints of laminates

Zhang,

Liu,

Chen

et al. 2024

Polymer Composites

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Bolted joints are widely used in aircraft structures. Proper design and accurate strength assessment of these joints are of great importance in aircraft design. In this paper, to investigate the mechanical behavior of single lap shear joints of carbon fiber reinforce plastic, four types of fastener of numerical model methods are developed. Based on the same principle of lap joint, different double bolt, and single‐lap joint structures with three distinct width‐diameter ratios (w/D) are designed and manufactured. Each specimen is loaded under tension until complete failure. The experimental results are used not only to verify the fastener models, but also to investigate the failure transformation induced from the composite load bypass and the bolt‐hole load bearing. It is found that the increase of w/D, the failure model could transfer from the net cross section damage caused by load bypass to the bolt hole failure caused by load bearing. By comparison, the numerical results show that the Cbush+RBE3 model has high adaptability and good fidelity in elastic stage without increasing the model scale in terms of the level of details. To improve the accuracy in nonlinear stage, hole geometry details need to be considered. Additionally, single bolt is created to reveal the nonlinear deformation affected by laminate thickness. Three/four/five row of bolt models are used to show the bolt load distribution characteristics. Finally, the influences of the element size and the bolt modeling methods on the bolt load distribution are analyzed, respectively.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling on load bearing and bypass behavior of bolted single lap joints of laminates

Zhang,

Liu,

Chen

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…The load elongation trace is used to determine the joints stiffness and joint yield strength. "The joint yield strength is defined as the load at which a line, offset from the origin by 4% of the fastener hole size and having slope equal to the joint stiffness, intersects the load-elongation trace" [Pratt and Pardeon (2002)]. The area under the load-elongation trace, or deformation energy, provides a direct measure of resistance to joint elongation.…”

Section: Mechanically Fastened Composite Jointsmentioning

confidence: 99%

Finite element analysis of composite bridge deck joints

Desai¹

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In this study a finite element model of a 4"-thick low-profile FRP bridge deck (Prodeck 4) made of E-glass fiber and vinyl ester resin, having a fiber volume fraction of approximately 50% and weighing about 10 lb/ft², is developed using the software ANSYS. The design also incorporates various joint systems such as an adhesively connected joint, mechanically riveted joint and a combined riveted and bonded joint. These modeled joints are subjected to compressive and bending loads to evaluate results such as strain profiles across the joint sections. The obtained results are compared with previous experimental results. A good correlation is found to exist between the finite element and experimental results of Prodeck 4.

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“…Pratt and Pardoen [27] conducted a study on joints having countersunk bolt-heads and showed that the MIL-HDBK-5 underestimates the strength of a single lap joint by up to 17%. The military standard consists of compiling single bolt joint data by halving the results from dual-bolt joint data.…”

Section: Fe Modeling and Testing Of Bolted Jointsmentioning

confidence: 99%

“…This was shown to be a conservative estimate by conducting tests on single and double bolted joints combined with FE analysis. [27] Extensometers, as shown in Figure 2.5, were attached to the tested specimens to obtain the load-elongation curves. The FE analysis was conducted using the NIKE3D code, along with the INGRID pre-processor and TAURUS post-processor.…”

Section: Fe Modeling and Testing Of Bolted Jointsmentioning

confidence: 99%

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Microstructure modeling and finite element analysis of particulate reinforced metal matrix composites

Shankaranarayana¹

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The study of microscopic and macroscopic response of a particulate reinforced metal matrix composites (PRMMC) using finite element (FE) analysis is the aim of the current investigation. In this regard, three types of microstructure models are subjected to FE analysis. In the first part of the work, a technique is presented for the generation of artificial microstructures containing spherical and ellipsoid shaped inclusions. The problem of detection of ellipsoidal intersection is tackled using newly available algorithms. To account for higherscale effects such as clustering, information from the micro-scale model is input into a meso-scale model. The FE analysis of the artificial microstructure and a summary of the results form the second part of the study. It is seen that the newly developed models agree very well with the published results and that the microstructure generation technique can be reused in many computational micromechanics problems with minimum modifications. Finally, the results obtained from the new models are used to study a problem of practical significance, namely bolted joints made of MMC material.

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Comparative Behavior of Single-Bolted and Dual-Bolted Lap Joints

Cited by 8 publications

References 7 publications

Numerical modeling on load bearing and bypass behavior of bolted single lap joints of laminates

Numerical modeling on load bearing and bypass behavior of bolted single lap joints of laminates

Finite element analysis of composite bridge deck joints

Microstructure modeling and finite element analysis of particulate reinforced metal matrix composites

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