Composite parts

It is critical that surface treatment conditions be optimized to composite properties since overtreatment as well as undertreatment will degrade composite properties. Typically composite interlaminar shear strength (ILSS), in-plane shear, and transverse tension ate used to assess the effectiveness of surface treatment. More recently damage tolerance properties such as edge delamination strength, open hole compression, and compression after impact have become more important in evaluating the toughness of composite parts. 

Even though the substrates are quite dissimilar, adhesive bonding of composite material is comparable to that of aluminum. Only aspects unique to composites will be discussed here. There are many details of composite part design, manufacture and performance that are not necessarily related to adhesive bonding that also will not be discussed. 

In-service performance. Service performance of bonded composite hardware has been good, at least from the standpoint of adhesive bonding. Like all aerospace hardware there have been occasional in-service problems with materials, design and manufacture of composite parts, but few have been related to adhesive bonding. 

Williams, B. E., Stiglich, J., and Kaplan, R, CVD Coated Powder Composites, Part I Powder Processing and Characterization, Ultramet, in Proc. IMS Ann. Meeting, New Orleans, LA (Feb. 1991)... 

Coran, A.Y. and Patel, R. Rubber-thermoplastic compositions. Part I. EPDM-polypropylene thermoplastic vulcanizates. Rubber Chem. TechnoL, 5, 141, 1980. 

Filament winding is one of the many fabrication techniques commercially available for the manufacture of composite parts. 

In recent years production of composite parts by filament winding has received much attention for thick parts and for parts with... 

This paper will discuss the formulation of the simulator for the filament winding process which describes the temperature and extent of cure in a cross-section of a composite part. The model consists of two parts the kinetic model to predict the curing kinetics of the polymeric system and the heat transfer model which incorporates the kinetic model. A Galerkin finite element code was written to solve the specially and time dependent system. The program was implemented on a microcomputer to minimize computer costs. 

The heat transfer model, energy and material balance equations plus boundary condition and initial conditions are shown in Figure 4. The energy balance partial differential equation (PDE) (Equation 10) assumes two dimensional axial conduction. Figure 5 illustrates the rectangular cross-section of the composite part. Convective boundary conditions are implemented at the interface between the walls and the polymer matrix. 

Powis, D. R., Prosser, H. J., Shortall, A. C. Wilson, A. D. (1988). Long-term monitoring of microleakage of composites. Part I radiochemical diffusion technique. Journal of Prosthetic Dentistry, 60, 304-7. 

Hazard evaluation posed by organotin compounds to natural resources is predicated partly on their chemical composition, partly on their concentration and persistence in abiotic materials and diet items, and partly on their availability to organisms. In each of these areas, key data are missing for promulgation of effective regulations. It seems that additional research is needed in eight areas to acquire these data ... 

Pollard, A. M. and Hatcher, H. (1986). The chemical analysis of Oriental ceramic body compositions part 2 - greenwares. Journal of Archaeological Science 13 261-287. 

Garcia EJ, Wardle BL, Hart AJ. Joining prepreg composite interfaces with aligned carbon nanotubes. Composites Part A Applied Science and Manufacturing. 2008 39(6) 1065-70. 

Fu SY, Lauke B, Mader E, Yue CY, Hu X. Tensile properties of short-glass-fiber- and short-carbon-fiber-reinforced polypropylene composites. Composites Part A Applied Science and Manufacturing. 2000 31(10) 1117-25. 

Thomason JL, Vlug MA. Influence of fiber length and concentration on the properties of glass fiber-reinforced polypropylene 1. Tensile and flexural modulus. Composites Part A Applied Science and Manufacturing. 1996 27(6) 477-84. 

Shirshova N, Qian H, Shaffer MSP, Steinke JHG, Greenhalgh ES, Curtis PT, et al. Structural composite supercapacitors. Composites Part A Applied Science and Manufacturing. 2013 Mar 46(0) 96-10Z. 

Hsu, W.E., Schwald, W. and Shields, J.A. (1989). Chemical and physical changes required for producing dimensionally stable wood-based composites. Part 2 heat post-treatment. Wood Science and Technology, 23(3), 281-288. 

Boron carbide (B C) is a hard, black crystal that is used as an abrasive powder and as an additive to strengthen composite parts in aircraft. 

Favre, J.P. and Jacques, D. (1990). Stress transfer by shear in carbon fiber model composites Part I Results of single fiber fragmentation tests with thermosetting resins. J. Mater. Sci. 25, 1373-1380. 

Yang, J.M., Jeng, S.M. and Yang, C.J. (1991). Fracture mechanisms of fiber reinforced titanium alloy matrbi composites. Part I. interfacial behaviour. Mater. Sci. Eng. AI38, 155-167. 

Favre, J.P. and Jacques, D. (1990). Stress transfer by shear in carbon fiber model composites Part I Results of single fiber fragmentation tests with thermosetting resins. J. Mater. Sci. 25, 1373-1380. Favre. J.P., Sigety, P. and Jacques, D. (1991). Stress transfer by shear in carbon fiber model composites. Part 2. Computer simulation of the fragmentation test. J. Mater. Sci. 26, 189-195. 

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