Tensile strength of open-hole, pin-loaded and multi-bolted single-lap joints in woven composite plates

Gamdani, Farid; Boukhili, Rachid; Vadean, Aurélian

doi:10.1016/j.matdes.2015.09.008

Cited by 54 publications

(26 citation statements)

References 30 publications

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“…Callus (2007) reported that needles of a diameter ≤1.0 mm distributed at the distance greater than 3-5 diameters cause no deterioration of the mechanical characteristics of the jointed composite plates and promote a uniform distribution of the stress. Presence of ±45° plies, with optimum amount of 30% to 50% of the total content of fibers, noticeably reduced concentration of the stresses (Gamdani et al 2015;Schläpfer, Kress 2014). Adhesive bonding is a quite natural technology for joining structural members made of FRP composites with polymer matrix.…”

Section: Experimental Investigation On Stiffness and Strength Of Singmentioning

confidence: 99%

“…The mechanical fastening requires drilling holes in the jointed components. Recent studies conducted by Bodjona, Lessardand (2015), Saleem et al (2015) and Gamdani et al (2015) can be mentioned amongst many others dedicated for analysis of stress distribution at a hole in laminated composites. Cutting the reinforcing fibers and introduction of the stress concentrators lead to reduction of the mechanical properties of the joints.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Arnautov

Kulakov

Andersons

et al. 2016

The Baltic Journal of Road and Bridge Engineering

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Carbon fiber-reinforced polymer (carbon-polymer) is an advanced lightweight composite material with high strength and excellent resistance to corrosion and fatigue. Over the past decades, application of fiber-reinforced polymers has been spread from the aerospace to other branches of industry such as automobile and civil engineering. Unidirectional carbon-polymers have a high potential for replacing steel in tensile members. Recently, the first carbonpolymer stress-ribbon bridge has been constructed in Germany. The non-laminated strip-loop carbon-polymer thin strips were used as the load bearing components in this bridge. In comparison with the laminated components, the applied cables are characterized by a more uniform strain distribution though reduced structural integrity. Alternative jointing technologies of carbon-polymer laminates are considered in this paper with an intention to increase the structural integrity and reliability of the production. Tensile behavior of the single-lap joints was investigated experimentally. Three types of the joints were considered. Adhesive joint was set as the reference. The overlap region of the mechanically fastened joints was produced using 9, 25, or 36 steel needles (z-pins) of 1 mm diameter. The proposed hybrid joints were additionally connected with adhesive increasing the load-bearing capacity of the reference joint up to 230%. Concerning the brittle fracture of the adhesive counterparts, the extended progressive failure process within the hybrid joints is responsible for the improvement.

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Section: Experimental Investigation On Stiffness and Strength Of Singmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Arnautov

Kulakov

Andersons

et al. 2016

The Baltic Journal of Road and Bridge Engineering

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“…In consequence, the bolted joint effectiveness in composites is worse than in metals, which detract from the weight advantage of composites [ 28 , 29 ]. Apart from the bolted joining, alternative methods of mechanical joining composite materials to metals have been developed.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Joining of Fibre Reinforced Polymer Composites to Metals—A Review. Part I: Bolted Joining

Galińska

2020

Polymers

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As the fibre reinforced plastic composites gain larger and larger share in industry, the problem of joining them with metal elements becomes significant. The current paper is the first part of the literature review, which gathers and evaluates knowledge about methods suitable for mechanical joining of composite and metal elements. This paper concerns bolted joining, because this method of mechanical joining is widely used for joining composite materials. The paper describes failure modes of bolted joints in composite materials, the influence of the bolt clamping torque, the clearance between the bolt and the hole and aging on the performance of the joint, drilling techniques used in composite materials in order to minimize damages, different fastener types, inspection techniques, and finally, the techniques that have been developed in order to improve the strength of the bolted joints in composites. Since the hole drilled in a composite material in order to perform bolted joining is a weak point of the structure, those techniques: bonded inserts, titanium foil internal inserts, fibre steering, additional reinforcement, and moulded holes, mainly aim to improve the strength of the hole in the composite. The techniques have been discussed in details and compared with each other in the summary section.

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“…In agreement with all these findings in the literature, the AASHTO LRFD (American Association of State Highway and Transportation Officials Load-and-resistance Factor Design) [ 6 ] restricts pure punched holes in the primary loading carrying members and gives limits of material thickness in some other uses. In addition, a considerable amount of recent research [ 7 , 8 , 9 , 10 , 11 ] was developed based on the open-hole tension and bolt-filled hole tension tests in accordance with ASTM (American Society of Testing Materials) standards [ 12 ] to provide mechanical characteristics of composite laminates.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Property of Open-Hole Steel Plates Influenced by Bolted Clamp-up and Hole Fabrication Methods

Wang¹,

Li²,

Liu³

et al. 2016

Materials

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Steel plates with open holes are commonly used in structural assemblies. The fatigue properties of such details are influenced by bolted clamp-up and hole fabrication methods. The fracture surface, stiffness degradation and fatigue life of test specimens are investigated in detail and compared with the contemporary test data. The analysis results show that the presence of draglines greatly influences the fatigue crack initiation at the open-hole cut by laser. The bolted clamp-up condition greatly enhances the stiffness and the fatigue life of the open-hole details. A discussion is also made from a comparison with the referred fatigue life of hole fabrication details, such as the influence of plate thickness and plasma cutting, drilling and oxy-fuel gas cutting, with the details studied herein. This work could enhance the understanding of the fatigue property and design of such details.

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Tensile strength of open-hole, pin-loaded and multi-bolted single-lap joints in woven composite plates

Cited by 54 publications

References 30 publications

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Mechanical Joining of Fibre Reinforced Polymer Composites to Metals—A Review. Part I: Bolted Joining

Fatigue Property of Open-Hole Steel Plates Influenced by Bolted Clamp-up and Hole Fabrication Methods

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