Macroscale Independently Homogenized Subcells for Modeling Braided Composites

Braided Hybrid Composites for Bridge Repair

Mechanical properties of hybrid braided composite rebars are evaluated and compared to theoretical predictions which account for specific processing parameters including yarn size, braiding machine setup, and fiber type. Using a combination of high modulus carbon (Thornel P-55S) and aramid (Kevlar 49) fibers bars have been produced of up to 10 mm diameter with a Young's modulus of 200 GPa, a bi...

Metric-Resolution 2D River Modeling at the Macroscale: Computational Methods and Applications in a Braided River

Metric resolution digital terrain models (DTMs) of rivers now make it possible for multi-dimensional fluid mechanics models to be applied to characterize flow at fine scales that are relevant to studies of river hydraulic geometry (HG) and ecological habitat, or microscales. These developments are important for managing rivers because of the potential to better understand system dynamics, anthr...

Micromechanical Modeling and Design Optimization of 2-D Triaxial Braided Composites

A micromechanical model for 2-D triaxial braided composites is presented. The tow arrangement in the representative unit cell is modeled by solving the packing problem using analytical optimization, avoiding the need to measure the geometric properties experimentally. These results are used in the development of a closed-form micromechanical model predicting the full 3-D stiffness matrix of the...

Depolarization regions of nonzero volume in bianisotropic homogenized composites

In conventional approaches to the homogenization of random particulate composites, the component phase particles are often treated mathematically as vanishingly small, point–like entities. The electromagnetic responses of these component phase particles are provided by depolarization dyadics which derive from the singularity of the corresponding dyadic Green functions. Through neglecting the sp...

Automated Upscaling of River Networks for Macroscale Hydrological Modeling