Composite structural elements

You should be familiar with some of the various concepts for how to analyze and design a joint between members of composite structures or between a composite structural element and a metallic structural ele-... 

Design of composite structural elements under crash loads... 

Energy absorbing mechanisms in composite structural elements... 

Johnson AF. Modelling impact damage in composite structural elements. In Beaumont P, Soutis C, editors. Multiscale modelling of composite materials and systems. Cambridge Woodhead 2005. pp. 401—29. 

The assembly of composite structural elements into a complete integrated structure will often involve bonding processes. These may be co-bonds or secondary bonds. In co-bonds, a cured composite is assembled with a film adhesive to an uncured laminate layup. The assembly is cured in an oven or autoclave. Secondary bonds are bonds between two cured laminates. The adhesive may be film or paste, and the cure may be in an oven or at room temperature. Composite repair following a damage event usually involves a co-bond by scarfing out the damage area, laying... 

Jones BH, Jakway W, Goldsworthy Engineering Inc, MM T—Pultruded composite structural elements, US Army Aviations systems Command Final Report, USAAMRDL-TR-76-5, Dec 1976. 

Altenbach, H. Altenbach, J. KISSING, W. (2004) Mechanics of Composite Structural Elements. Springer, Heidelberg. 

Mortensen F (1998), Development of tools for engineering analysis and design of high-performance FRP-composite structural elements . Doctorate PhD thesis, Aalborg University, Aalborg East, Denmark. 

Structural keys describe the chemical composition and structural motifs of molecules represented as a Boolean array. If a certain structural feature is present in a molecule or a substructure, a particular bit is set to 1 (true), otherwise to 0 (false). A bit in this array may encode a particular functional group (such as a carboxylic acid or an amidelinkage), a structural element (e.g., a substituted cyclohexane), or at least n occurrences of a particular element (e.g., a carbon atom). Alternatively, the structural key can be defined as an array of integers where the elements of this array contain the frequency of a specific feature in the molecule. 

Unlike most conventional materials, there is a very close relation between the manufacture of a composite material and its end use. The manufacture of the material is often actually part of the fabrication process for the structural element or even the complete structure. Thus, a complete description of the manufacturing process is not possible nor is it even desirable. The discussion of manufacturing of laminated fiber-reinforced composite materials is restricted in this section to how the fibers and matrix materials are assembled to make a lamina and how, subsequently, laminae are assembled and cured to make a laminate. 

Labor cost in a structure is directly related to part count. If part count can be reduced, then labor costs (and inventory costs) wili decrease. Composite structures are generally composed of many fewer parts than are metal structures. Integral part design and fabrication techniques reduce fastener count and bonding operations. Thus, composite structures can have cost elements that are considerably lower than those for metal structures. 

Laminated plates are one of the simplest and most widespread practical applications of composite laminates. Laminated beams are, of course, simpler. However, such essentially one-dimensional structural elements do not display well the unique two-dimensional capabilities and characteristics of composite laminates. 

One of the key elements in laminated composite structures design is the ability to tailor a laminate to suit the job at hand. Tailoring consists of the following steps. We want to design the constituents of the laminate, and those constituents include the basic building blocks of the individual laminae and as well how they are oriented within the laminate. We design those constituents to just barely meet (with an appropriate factor of safety) the specific requirements for, say, strength and stiffness. 

Compositional, Structural and Bonding Variations in Ternary Phases of Lithium with Main-group and Late-transition Elements... 

---