Application of genetic algorithm for optimum design of bolted composite lap joints

Kradinov, Vladimir; Madenci, Erdogan; Ambur, Damodar R.

doi:10.1016/j.compstruct.2005.06.009

Cited by 35 publications

(9 citation statements)

References 11 publications

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“…The large number of variables within any joint design makes it difficult and expensive to test even a small range of joints comprehensively. Therefore many attempts have been made to understand and predict the failure of composite joints [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] using numerical and analytical methods to reduce the experimental effort required. Most successful joint modelling has been conducted with slow design tools, i.e.…”

mentioning

confidence: 99%

Experimental Investigation of Dynamically Loaded Bolted Joints in Carbon Fibre Composite Structures

Pearce

Johnson

Thomson³

et al. 2009

Appl Compos Mater

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This paper reports on recent experimental work to investigate the response of bolted carbon fibre composite joints and structures when subjected to constant dynamic loading rates between 0.1 m/s and 10 m/s. Single fastener joints were tested in both the bearing (shear) and pull-through (normal) loading directions. It was found that the joints exhibited only minor loading rate dependence when loaded in the pull-through direction but there was a significant change in failure mode when the joints were loaded in bearing at or above 1 m/s. Below 1 m/s loading rate the failure mode consisted of initial bolt bearing followed by bolt failure. At a loading rate of 1 m/s and above the bolt failed in a 'tearing' mode that absorbed significantly more energy than the low rate tests. A simple composite structure was created to investigate the effect of loading rate on a more complex joint arrangement. The structure was loaded in two different modes and at constant dynamic loading rates between 0.1 m/s and 10 m/s. For the structure investigated and the loading modes considered, only minor loading rate effects were observed, even when the dominant contribution to joint loads came from bearing. It was observed that the load realignment present in the structural tests allowed the joints to fail in a mode that was not bearing dominant, and hence the loading rate sensitivity was not expressed.

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mentioning

confidence: 99%

Experimental Investigation of Dynamically Loaded Bolted Joints in Carbon Fibre Composite Structures

Pearce

Johnson

Thomson³

et al. 2009

Appl Compos Mater

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“…However in most cases [12][13][14] the focus is always on a specific joint problem and a numerical approach (e.g. the genetic algorithm) is normally used to find an optimum solution.…”

Section: Bolted Joint Connectionsmentioning

confidence: 99%

Development of efficient and cost-effective spacecraft structures based on honeycomb panel assemblies

Bianchi

Aglietti

Richardson

2010

2010 IEEE Aerospace Conference

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Due to their high strength to weight ratio and stiffness to weight ratio the use of honeycomb panels is particularly attractive in spacecraft structures. Honeycomb panels are often used in secondary satellite structures such as equipment platforms and solar arrays, but they can also be used as part of the primary structure of a satellite. Indeed honeycomb panel assemblies can be, and are, used to produce efficient and cost-effective primary structures. These types of structures have been used for some time for numerous satellites; however, their development still poses some challenges ranging from the structural performance of the panels themselves to the problem of connecting them to other panels or structural elements. These challenges are faced each time a new satellite is being developed adding cost to the design process. Furthermore, often due to strict timescales in the development process, some of the uncertainties which naturally arise from these challenges cannot always be completely addressed. To compensate for this, conservative design approaches often need to be taken with the ultimate effect of lowering the efficiency of the structure's final design. To meet these challenges and provide a better knowledge base for future satellite development projects a number of research activities have been, and are still, under way at the University of Southampton. The aim of this paper is to describe these research activities and present the key results. ©2010 IEEE

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“…Upon review of the optimization techniques available in the literature, the genetic algorithm (GA) was selected to stochastically guide the algorithm through the solution space of available designs and to arrive at an evolved one [2][3][4][5][6]. In the literature, the GA is a form of artificial evolution and is a commonly used method for optimization [7][8][9][10][11]. A Darwinian "survival of the fittest" approach has been employed to search for optima in large multidimensional spaces [13,14].…”

Section: Introductionmentioning

confidence: 99%

Optimal microchannel design using genetic algorithms

et al. 2009

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This paper presents a novel method of optimizing particle-suspended microfluidic channels using genetic algorithms (GAs). The GAs can be used to generate an optimal microchannel design by varying its geometrical parameters. A heuristic simulation can be useful for simulating the emergent behaviors of particles resulting from their interaction with a virtual microchannel environment. At the same time, fitness evaluation enables us to direct evolutions towards an optimized microchannel design. Specifically, this technique can be used to demonstrate its feasibility by optimizing one commercialized product for clinical applications such as the microchannel-type imaging flow cytometry of human erythrocytes. The resulting channel design can also be fabricated and then compared to its counterpart. This result implies that this approach can be potentially beneficial for developing a complex microchannel design in a controlled manner.

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Application of genetic algorithm for optimum design of bolted composite lap joints

Cited by 35 publications

References 11 publications

Experimental Investigation of Dynamically Loaded Bolted Joints in Carbon Fibre Composite Structures

Experimental Investigation of Dynamically Loaded Bolted Joints in Carbon Fibre Composite Structures

Development of efficient and cost-effective spacecraft structures based on honeycomb panel assemblies

Optimal microchannel design using genetic algorithms

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