Numerical simulation of anisotropic polymeric foams

Characterization of polymeric foams

Mechanical properties of CNT reinforced nano-cellular polymeric nanocomposite foams

Mechanics of CNT-reinforced nano-cellular PMMA nanocomposites are investigated using coarse-grained molecular dynamics simulations. Firstly, static uniaxial stretching of bulk PMMA polymer is simulated and the results are compared with literature. Then, nano-cellular foams with different relative densities are constructed and subjected to static uniaxial stretching and obtained stress-strain cu...

Numerical Simulation of Doi Model of Polymeric Fluids

We study the Doi model for shear flow. The finite element method on sphere is developed, the basis function is carefully chosen to guarantee the conservation of distribution function. The numerical results presented confirm the main conclusion. The viscosity jump is observed during the flow induced phase transition.

Negative Poisson's Ratio Polymeric and Metallic Foams

Foam materials based on metal and several polymers were transformed so that their cellular architectures became re-entrant, ie. with inwardly protruding cell ribs. Foams with re-entrant structures exhibited negative Poisson's ratios as well as greater resilience than conventional foams. Foams with negative Poisson's ratios were prepared using different techniques and materials and their mechani...

Numerical Simulation of Temperature-Dependent, Anisotropic Tertiary Creep Damage

Directionally-solidified (DS) Ni-base superalloys are commonly applied as turbine materials to primarily withstand creep conditions manifested in either marine-, airor landbased gas turbines components. The thrust for increased efficiency of these systems, however, translates into the need for these materials to exhibit considerable strength and temperature resistance. Accurate prediction of cr...