Thermo-Mechanical Behavior

The tetrafunctional epoxy resin systems cured with BAPPO showed enhanced dynamic mechanical properties due to increased crosshnking density and rigidity. 

The Tg and storage modulus of tetrafunctional epoxy resins cured by BAPPOO were higher than that of the resins cured with DDM as it is clear from Table 3.5. For example, Tg of TGDDM/DDM system was 200°C and its storage 

Type of Epoxy Matrix name Nanoreinforcement Curing agent 

Resin System Tensile Strength (MPa) Tensile Modulus (GPa) Flexural Strength (MPa) Flexural Modulus (GPa) Impact Strength (KJ/mfi Hardness 

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Within the framework of the TPM, the thermo-mechanical behavior of a saturated porous solid consisting of k constituents is described by using the local statements of the balance equation of mass,... 

Various acrylate copolymers with complex architectures have beensynthesized via atom transfer radical polymerization. A strong correlation between the molecular structure and composition of the copolymers and their thermo-mechanical behavior have been found. This suggests a facile route for creating new advanced materials with tailored properties. 

Qi, H.J., Nguyen, T.D., Castro, E., Yakacki, C.M., and Shandas, R. (2008) Einite deformation thermo-mechanical behavior of thermally induced shape memory polymers. Journal of the Mechanics and Physics of Solids, 56, 1730-1751. 

Hamdani, S., Potluri, P., Fernando, A., 2013. Thermo-mechanical behavior of textile heating fabric based on silver coated polymeric yam. Materials 6, 1072—1089. 

Huang, W. M., Lee, C. W., Teo, H. P. (2006), Thermo-mechanical behavior of a polyurethane shape memory polymer foam., J. Intell. Mater Syst Struct, 17,753-60. 

Tobushi et al. (2001) presented an empirical model based on the observation of the thermo-mechanical behavior of shape memoiy polymers (SMPs). In the model, the modulus of the SMPs was considered to linearly decrease with the temperature increase in a narrow region around T (T - T < T < T + T ). The stress vs strain profiles in shape memorization were predicted based on a nonlinear visco-elastic equation. This model mainly took account of the modulus variation above and below T, but noted no further microscopic changes in the shape memorization (Tobushi et al., 2001). 

Gojny F H, Nastalczyk J, Roslaiiiec Z and Schulte K (2003) Surface modified multi-walled carbon nanotubes in CNT/epoxy composites, Chem Phys Lett 370 820-824. Gojny F H and Schulte K (2004) Functionalisation effect on the thermo-mechanical behavior of multi-walled carbon nanotube/epoxy composites. Compos Sci Technol 64 2303-2308. 

C.Q. Sun, Thermo-mechanical behavior of low-dimensional systems the local bond average approach. Prog. Mater Sci. 54(2), 179-307 (2009)... 

Monatomic chains (MCs), nanotubes (NTs), nanowires (NWs), solid and liquid surface skins, nanocavities, and nanograins share considerable similarities in the thermo-mechanical behavior. 

Once the backing structure is bonded to the shell, the qualification tests are carried out to check that the equipment can withstand the launching loads and the thermo-mechanical behavior is as predicted. 

Shrinkage stress is generated by the curing reaction of the adhesives, which means that the thermal and thermo-mechanical behavior of the adhesives during the bonding process should be evaluated before their use in electronics. 

In another research, the thermo-mechanical behavior of SMPs was described by both linear and nonlinear viscoelastic theories [4]. In this woik four element mechanical units consisting of spring, dashpot and frictional device were used to derive a constitutive differential equation. In order to determine the material properties by a constitutive differential equation the modulus, viscosity and other parameters were assumed to decay exponentially with temperature. Liu et al. [5] developed a constitutive equation for SMPs based on thermodynamic concepts of entropy and internal energy. They adopted the concept of frozen strain and demonstrated the utility of the model by simulating the stress and strain... 

Dimitrienko, (1997) Thermo-mechanical behavior of composite structures at high temperature. Absence of model for ablation, (n/a for thermosets) or treatment of the propagation of cracks / voids with increase in temperature. [52]... 

Flow induced vibration Fuel centerline temperature Gap conductance Fission gas release fraction Gas plenum pressure Thermo-mechanical behavior of cladding... 

S. Higuchi and S. Sakurai, A Study on Thermo-Mechanical Behavior of Typical Fuel Rods in an SCWR Core, Proc. 4th Int. Symp. on SCWR, Heidelberg, Germany, March 8-11, 2009, Paper No. 72 (2009)... 

Ju D-Y, Ji V, Gassot H (2004) Computer predictions of thermo-mechanical behavior and residual stresses in spray coating process. In Journal de Physique IV (Proceedings). EDP sciences, pp 381-388... 

This research uses the validated finite-element analyses to study the thermo-mechanical behaviors of the 96.5Sn-3.5Ag, 95.5Sn-3.8Ag-0.7Cu lead-fi ce solders and the classical 63Sn-37Pb solder bumped wafer level chip scale package on PCB assemblies subjected to a novel temperature cycle test. It can be seen that the same scale to the WLCSP and the WLCSP with underfill, the difference of the equivalent total strain range exceed an order of magnitude for all the three solder joints. 

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