Reinforcement finite element simulations

Nassehi, V., Dhillon,. 1. and Mascia, L., 1993a. Finite element simulation of the micro-mechanics of interlayered polymer/fibre conrposites a study of the interactions between the reinforcing phases. Compos. Sci. Tech. 47, 349-358. 

Liu, T., Deng, Z.C., and Lu, T.J. (2008) Analytical modeling and finite element simulation of the plastic collapse of sandwich beams with pin-reinforced foam cores. Interrmtioruil Journal of Solids and Structures, 45, 5127 5151. 

Models of increasing sophistication have been developed to predict the elastic properties of composite materials from the properties of their constituent parts. These range from the simple rule-of-mixtures approach to the Halpin-Tsai and Mori-Tanaka analyses, where the geometry - essentially, the aspect ratio - of the reinforcing particles can be taken into account. This has the potential to model the effects of extreme aspect ratios that are seen in nanocomposites. Direct finite element simulation of the microstructure is an option that is becoming increasingly feasible at both the micro and nano levels. 

In particular it can be shown that the dynamic flocculation model of stress softening and hysteresis fulfils a plausibility criterion, important, e.g., for finite element (FE) apphcations. Accordingly, any deformation mode can be predicted based solely on uniaxial stress-strain measurements, which can be carried out relatively easily. From the simulations of stress-strain cycles at medium and large strain it can be concluded that the model of cluster breakdown and reaggregation for prestrained samples represents a fundamental micromechanical basis for the description of nonlinear viscoelasticity of filler-reinforced rubbers. Thereby, the mechanisms of energy storage and dissipation are traced back to the elastic response of tender but fragile filler clusters [24]. 

Using Equations 5.53-5.56 a three-dimensional non-isothermal simulation of a typical IP process has been performed using a finite element control volume technique [31,34-36], The density specific heat and thermal conductivity of the resin and reinforcement used in the simulations are given in Table 5.1. 

The success of the developed model in predicting uniaxial and equi-biaxi-al stress strain curves correctly emphasizes the role of filler networking in deriving a constitutive material law of reinforced rubbers that covers the deformation behavior up to large strains. Since different deformation modes can be described with a single set of material parameters, the model appears well suited for being implemented into a finite element (FE) code for simulations of three-dimensional, complex deformations of elastomer materials in the quasi-static Emit. 

N. Hamila, and P. Boisse, Simulations of textile composite reinforcement draping using a new semi-discrete three node finite element. Compos. B 39, 999-1010, (2008). 

Gotzmann [60] discusses methods used in the manufacture of metal plastic hybrid components such as glass fibre reinforced PA around a steel or aluminium profile placed in the mould used for injection moulding plastics. Some applications of such components were examined, and computer aided materials selection, finite element analysis and computer simulation systems developed for use in this technology are described. 

For finite element modeling of reinforced concrete wall segments subjected to nonlinear shear actions (e.g., squat walls, wall piers, wall spandrels), although a number of cyclic constitutive models have been proposed for simulating the nonlinear responses of constitutive panel elements of the finite element model, most of these model formulations are not included in commonly-used structural analysis platforms due to complexities in their implementation. A new constitutive... 

Ke Twords computer aided engineering (CAE), computer simulation, fiber orientation prediction, fiber orientation modelling, fiber reinforced thermoplastics, finite difference method, finite element method (FEM), flow, glass fiber reinforcement, injection molding, mold filling analysis, warpage. 

Hamila, N., Boisse, P., Sabourin, F., Brunet, M., 2009. A semi-discrete shell finite element for textile composite reinforcement forming simulation. Int. J. Numer. Methods Eng. 79, 1443-1466. 

Soulat, D., Cheruet, A., Boisse, P., 2006. Simulation of continuous fibre reinforced thermoplastic forming using a shell finite element with transverse stress. Comput. Struct. 84,888-903. 

Hieber CA, Shen SF (1980) A finite-element/finite-difference simulation of the injection-molding filling process. J Non-Newtonian Fluid Mech 7 1-32 Hill R (1963) Elastic properties of reinforced solids Some theoretical principles. J Mech Phys Solids 11 357-372... 

Sargent, J., Chen, J., Sherwood, J., Cao, J., Boisse,P., Willem, A., Vanclooster, K., Lomov, S. V., Khan, M., Mabrouki, T., Fetfatsidis, K. and Jauffres, D. (2010), Benchmark study of finite element models for simulating the thermostamping of woven-fabric reinforced composites . International Journal of Material Forming, 3 (Suppl 1), 683-686. 

The response of low-rise structures to earthquake loading has been extensively studied by employing advanced finite element analyses (FEA), quasi-static experiments, pseudo-dynamic (PSD) simulation of structural components and structural systems. It has also been investigated through shake table tests on models at different scales. On the contrary, reliable estimation of the structural capacity of complex high-rise reinforced concrete (RC) or composite systems under extreme loads has been hindered by the lack of suitable analysis software, computational capacity for refined model analysis, and the impracticality of experimental testing. 

The issues that arise here - the distribution and orientation of platelets, their size, shape and aspect ratio, the effectiveness of simplified reinforcement models, and the filler network - can be addressed by numerical simulation. We shall use Finite Element (FE) modeling within a stochastic framework in the development below. 

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