On the Structural Behavior of Mechanically Fastened Joints in Composite Structures

1980 ◽  
pp. 575-602 ◽  
Author(s):  
Donald W. Oplinger
Keyword(s):  
Composite Structures ◽  
Structural Behavior ◽  
Mechanically Fastened

A Review of Damage Tolerant Design, Certification and Repair in Metals Compared to Composite Materials

2014 ◽  
Vol 891-892 ◽  
pp. 1597-1602 ◽  
Author(s):  
Nabil Chowdhury ◽  
Wing Kong Chiu ◽  
John Wang
Keyword(s):  
Composite Materials ◽  
Composite Structures ◽  
Failure Modes ◽  
Structural Integrity ◽  
Fiber Reinforced Polymers ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Repair Efficiency ◽  
Mechanically Fastened ◽  
Damage Tolerant

A review of some of the various fatigue models introduced over the years for both metallic materials, in particular aluminium alloys followed by fatigue and durability concerns associated with composite materials. The move towards light weight and high stiffness structures that have good fatigue durability and corrosion resistance has led to the rapid move from metal structures to composite structures. With this brings the added concern of certifying new components as the damage mechanisms and failure modes in metals differ significantly than composite materials such as carbon fiber reinforced polymers (CFRP). The certification philosophy for composites must meet the same structural integrity, safety and durability requirements as that of metals. Hence this is where the challenge now lies. Substantial work has been conducted in the reparability of composite structures through bonding using various adherend thicknesses and joint types and has been shown to have higher durability than mechanically fastened repairs for thin adherends however these are currently unacceptable repair methods as they cannot be certified. Repairs are designed on the basis that the repair efficiency can be predicted and should be designed conservatively with respect to the various failure modes and include the surrounding structure.

Experimental Study and Analysis of the Structural Behavior of Steel-Concrete Composite Beam after Shear Connector Corrosion

2014 ◽  
Vol 578-579 ◽  
pp. 1522-1530
Author(s):  
Ya Chuan Kuang ◽  
Jin Ren Feng ◽  
Zhi Wu Yu ◽  
Xiao Jie Liu
Keyword(s):  
Composite Beam ◽  
Composite Structures ◽  
Shear Capacity ◽  
Experimental Results ◽  
Structural Behavior ◽  
Conduction Time ◽  
Shear Connector ◽  
Flexural Capacity ◽  
Bond Slip ◽  
Stud Shear Connector

Stud shear connector corrosion is an important factor for the durability degradation of steel-concrete composite structures. Stud shear connector corrosion in the natural environment is a slow process, so the shear capacity of deteriorated stud shear connector was studied by accelerate d deterioration using a galvanstatic method in this paper. Then, bending tests were conducted to study the structural behavior of steel-concrete composite beam after stud shear connector corrosion. Experimental results show that with the increase of conduction time, the corrosion rate of stud increases, the shear capacity of stud as well as the flexural capacity of steel-concrete composite beam decreases and the relative bond-slip between steel beam and concrete increases when loading. By the regression analysis of experimental results, formula was proposed to predict the shear capacity of studs after corrosion and the flexural capacity of deteriorated steel-concrete composite beam.

scholarly journals Study on Mechanical Bearing Strength and Failure Modes of Composite Materials for Marine Structures

2021 ◽  
Vol 9 (7) ◽  
pp. 726
Author(s):  
Dong-Uk Kim ◽  
Hyoung-Seock Seo ◽  
Ho-Yun Jang
Keyword(s):  
Composite Materials ◽  
Failure Mode ◽  
Composite Structures ◽  
Failure Modes ◽  
Offshore Structures ◽  
Fiber Reinforced ◽  
Bearing Strength ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Mechanically Fastened

With the gradual application of composite materials to ships and offshore structures, the structural strength of composites that can replace steel should be explored. In this study, the mechanical bearing strength and failure modes of a composite-to-metal joining structure connected by mechanically fastened joints were experimentally analyzed. The effects of the fiber tensile strength and stress concentration on the static bearing strength and failure modes of the composite structures were investigated. For the experiment, quasi-isotropic [45°/0°/–45°/90°]2S carbon fiber-reinforced plastic (CFRP) and glass fiber-reinforced plastic (GFRP) specimens were prepared with hole diameters of 5, 6, 8, and 10 mm. The experimental results showed that the average static bearing strength of the CFRP specimen was 30% or higher than that of the GFRP specimen. In terms of the failure mode of the mechanically fastened joint, a cleavage failure mode was observed in the GFRP specimen for hole diameters of 5 mm and 6 mm, whereas a net-tension failure mode was observed for hole diameters of 8 mm and 10 mm. Bearing failure occurred in the CFRP specimens.

Structural behavior of co-bonded composite structures subject to mode I and mode II fatigue induced delamination.

2017 ◽  
Author(s):  
Felipe Garpelli ◽  
Francis Gonzalez ◽  
Núbia Nale Silveira ◽  
Mariano Arbelo ◽  
Mauricio Donadon ◽  
...  
Keyword(s):  
Composite Structures ◽  
Structural Behavior ◽  
Mode I ◽  
Mode Ii ◽  
Bonded Composite

scholarly journals Modeling of Mechanical Properties of the Polymeric Composite Reinforced with Braided Preform

2021 ◽  
Vol 1199 (1) ◽  
pp. 012007
Author(s):  
A Kondratiev ◽  
O Andrieiev ◽  
A Tsaritsynskyi ◽  
T Nabokina
Keyword(s):  
Composite Materials ◽  
Composite Structures ◽  
High Speed ◽  
Experimental Studies ◽  
Polymeric Composite ◽  
Structural Behavior ◽  
Elastic Behavior ◽  
Design Parameters ◽  
Polymeric Composite Materials ◽  
Reinforcement Angle

Abstract Braided composite structures based on preforms are widely used in various industries. Owing to use of such preforms high speed and efficiency of the process of manufacturing of polymeric composite materials and structures on their basis can be provided. Knowledge of their properties in the design allows optimizing the production of structures with the specified parameters. The paper gives the review of three approaches to the description of physical and mechanical characteristics of the composite with braided fixtures – based on the classical theory of layered media, rod-based model, and the method of polynomial approximation. The necessary estimated dependencies were derived in order to predict the elastic and structural behavior of the composites under study at any reinforcement angle according to the known characteristics of predetermined angles. Synthesized design parameters, as distinct from the existing ones, allow predicting strength characteristics of the composite based on the braided hoses depending on the positioning and location of the material on the shape-generating surface. For the verification of theoretical results, a number of experimental studies have been carried out with the formation of samples of the material with the different reinforcing angles. Comparison of the analytical and experimental results allows drawing the conclusions that rod-based model gives the best results for the description of elastic behavior of the polymeric composite materials, whereas the obtained polynomial dependences are recommended for the structural behavior. The results of the work represent the basis for solving the problems of calculation of strength of the structures made of composite materials based on the braided preforms

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