Material Properties Reliance Improving Numerical Analysis Accuracy

Numerical stress analysis of granular material

The knowledge about granular materials is rather limited compared to the respective information on the solids, while a unified theory encompassing all granular material phenomena has not been created yet [1]. Despite the fact that granular material is the discontinuous media its behavior is commonly described by the continuum approach. Consequently, the definition of stresses in granular materi...

Comprehensive Numerical Analysis of Finite Difference Time Domain Methods for Improving Optical Waveguide Sensor Accuracy

This paper discusses numerical analysis methods for different geometrical features that have limited interval values for typically used sensor wavelengths. Compared with existing Finite Difference Time Domain (FDTD) methods, the alternating direction implicit (ADI)-FDTD method reduces the number of sub-steps by a factor of two to three, which represents a 33% time savings in each single run. Th...

Time-Dependent Material Properties of Shotcrete: Experimental and Numerical Study

A new experimental program, focusing on the evolution of the Young's modulus, uniaxial compressive strength, shrinkage and creep of shotcrete is presented. The laboratory tests are, starting at very young ages of the material, conducted on two different types of specimens sampled at the site of the Brenner Basetunnel. The experimental results are evaluated and compared to other experiments from...

17 Properties and Numerical Modeling - Simulation of Phase Changes Material

Accuracy Properties of the Statistics from Numerical Simulations

This paper is concerned with the approximation errors involved in the statistics from the sample paths generated by an approximate or computed policy function. Under fairly general assumptions, we establish convergence of these statistics to their true expected values as the approximation error of the policy function converges to zero. Furthermore, under additional regularity conditions we also...