Thermomechanical behavior composites

Taya, M. and Arsenault, R.J. (1989). Metal Matrix Composites-Thermomechanical Behavior, Pergamon Press, Oxford. 

Suresh, S., and A. Mortensen, Fundamentals of Functionally Graded Materials Processing and Thermomechanical Behavior of Graded Metals and Metal-Ceramic Composites, Ashgate Publishing Co., Brookfield, VT (1999). 

Figure 3. Thermomechanical behavior of various homo-PMMA with different molecular weights. (PMMA is extracted from the cellulose structure of the cellu-lose-PMMA composite prepared by the heterogeneous grafting).

Figure 12. Thermomechanical behavior of an acetylated-propionylated wood sample and the acetylated-propionylated wood-polystyrene composites prepared by the y-ray induced graft copolymerization in a pyridine medium. Numerical values on the curves represent the total dose of the irradiated y-ray. Key (total irradiation, resultant weight increase based on the weight of wood) A, 0.1 Mrad, 4.2% , 0.5 Mrad, 12.2% , 1.9 Mrad, 49.1% A, 2.4 Mrad, 66.0% and ,...

Figure 13. Thermomechanical behavior of O, the acetylated wood and , the acetylated wood-polystyrene composite prepared by the y-ray induced graft copolymerization in a pyridine medium. Conditions total dose, 2 Mrad resultant...

Acrylate copolymers with complex linear or star architectures were prepared and characterized. Precise control over the sequence distribntion and overall composition of these materials was achieved by atom transfer radical polymerization. A strong correlation between the molecular stractme and composition of the copolymers and their thermomechanical behavior was foimd. This provides a new way for creating advanced materials with tailored properties. 

High temperature thermomechanical behavior of carbon-phenolic and carbon-carbon composites, I. Analysis. J. Compos. Mater., 26 (2), 206-229. 

Figure 6.17 Typical thermomechanical behavior in terms of stress strain-temperature of the CP-PSMP composite with 6% CP during programming (ABCD), confined stress recovery (DEF), and tree strain recovery (DG). Source [34] Reproduced with permission ftom Elsevier...

Figure 6.18 Typical thermomechanical behavior of the CP-PSMP composite with 3% CP. Source [33] Reproduced with permission from lOP Puhhshing...

Figure 25 describes the thermal expansion of the silica KD brick-only and the silica KD brick/mortar composite samples. The mortar-only sample was also tested. The brick-only and the brick/mortar composite samples are similar except for temperatures above about 1100°F. The mortar softens considerably, as reflected in the mortar-only sample. Due to the confinement of the mortar within the mortar joint in the brick/mortar composite sample, the mortar maintains reasonable strength. This confirms that the true compressive stress-strain behavior of mortar must be tested with the mortar contained in the mortar joint (2). Containment of the mortar is an important and necessary parameter in testing the thermomechanical behavior of mortar. 

Figures 33 and 34 show the temperature dependent thermal expansion of the silica KN brick-only, mortar-only, and brick/mortar composite samples. The interpretive results are quite similar to the interpretive results of the silica KD tests. These results also show that the mortar-only (unconfined mortar) tests do not reflect the true confined thermomechanical behavior of mortar in mortar joints. Strength patterns as a function of temperature are also similar to the silica KD brick.

Sun E.S. Modeling and Simulation of Thermomechanical Behavior of Thick Fiber Reinforced Thermoset Composites, Ph.D. thesis. University of Wisconsin-Madison (1996). 

The complex sorption behavior of the water in amine-epoxy thermosets is discussed and related to depression of the mechanical properties. The hypothesized sorption modes and the corresponding mechanisms of plasticization are discussed on the basis of experimental vapor and liquid sorption tests, differential scanning calorimetry (DSC), thermomechanical analysis (TMA) and dynamic mechanical analysis. In particular, two different types of epoxy materials have been chosen low-performance systems of diglycidyl ether of bisphenol-A (DGEBA) cured with linear amines, and high-performance formulations based on aromatic amine-cured tetraglycidyldiamino diphenylmethane (TGDDM) which are commonly used as matrices for carbon fiber composites. 

The term water dynamics indicates the mobility of the plasticizing diluent and a theoretical approach to understanding how to control the water movement in glassforming food systems. The term glass dynamics deals with the time and temperature dependence of relationships among composition, structure, and thermomechanical properties, as well as the functional behavior of food systems. 

Zenasni R, Bachir AS, Vina I, Argiielles A, Vina J. Effects of hygro-thermomechanical aging on the interlaminar fracture behavior of woven fabric fiher/PEI composite materials. J Compos Mater 2006 19 385-98. http //dx.doi.org/ 10.1177/0892705706059743. 

It is now well established that the thermomechanical response of glassy polymers and their composites is viscoelastic at temperatures near to, and above the glass transition temperature. Therefore, an accurate long term durability model at elevated temperatures for resins and reinforced plastics (FRP) must necessarily include viscoelastic behavior. This is especially true... 

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