We present an efficient algorithm to find an optimal fiber orientation in composite materials. Within a two-scale setting fiber orientation is regarded as a function in space on the macrolevel. The optimization problem is formulated within a function space setting which makes the imposition of smoothness requirements straightforward and allows for rather general convex objective functionals. We...

the present paper offers a meso-scale numerical model to investigate the effects of random distribution of aggregate particles and steel fibers on the elastic modulus of steel fiber reinforced concrete (sfrc). meso-scale model distinctively models coarse aggregate, cementitious mortar, and interfacial transition zone (itz) between aggregate, mortar, and steel fibers with their respective materi...

Fuel cells constitute one of the most promising sources of clean energy for the 21 century and bipolar plate is an important component of a PEM fuel cell. Polymers filled with conducting fibers have been chosen as a candidate material for bipolar plates which needs to fulfill the surface conductivity requirement. In the present paper, effect of processing parameters including melt temperature, ...

This paper presents a novel and fast probabilistic method for white matter fiber tracking from diffusion weighted MRI (DWI). We formulate fiber tracking on a nonlinear state space model which is able to capture both smoothness regularity of fibers and uncertainties of the local fiber orientations due to noise and partial volume effects. The global tracking model is implemented using particle fi...

Current therapeutic angiogenesis strategies are focused on the development of biologically responsive scaffolds that can deliver multiple angiogenic cytokines and/or cells in ischemic regions. Herein, we report on a novel electrospinning approach to fabricate cytokine-containing nanofibrous scaffolds with tunable architecture to promote angiogenesis. Fiber diameter and uniformity were controlle...

Steel fiber reinforced concrete (SFRC) is used for slabs on grade such as pavements, industrial floors, airport runways, since it exhibits excellent isotropic mechanical properties. When mixing the fibers with the fresh concrete, care is taken to obtain a uniform distribution and a random orientation of the fibers. The strength of this concrete primarily depends on the fiber content, hence it i...