Structural Phenomenon of Cement-Based Composite Elements in Ultimate Limit State

Structural Health Monitoring in Composite Automotive Elements

Ultimate limit to human longevity

Are there limits to human longevity? We suggest a new demographic model to describe human demographic trajectories. Specifically, the model mathematically defines the limits of longevity. Through the demographic analysis of trends for Sweden (between 1751 and 2002), Switzerland (between 1876 and 2002) and Japan (between 1950 and 1999), which are the longest-lived countries, we would like to dem...

Pareto-Optimal Evaluation of Ultimate Limit States in Offshore Wind Turbine Structural Analysis

The ultimate capacity of support structures is checked with extreme loads. This is straightforward when the limit state equations depend on a single load component, and it has become common to report maxima for each load component. However, if more than one load component is influential, e.g., both axial force and bending moments, it is not straightforward how to define an extreme load. The com...

Nanoindentation of microstructural elements in bone cement

Introduction: Poly(methyl methacrylate), or PMMA bone cement has been a critical material in total joint replacement for over four decades. Modifications used to improve the standard polymer powder/methacrylate monomer system have included the addition of fiber reinforcing phases, bioactive ceramics, antibiotic agents, etc. The microstructural phases in PMMA bone cement can affect its fracture ...

Ultimate state of thermal convection.

The ultimate regime of thermal convection, the so-called Kraichnan regime [R. H. Kraichnan, Phys. Fluids 5, 1374 (1962)]], hitherto has been elusive. Here numerical evidence for that regime is presented by performing simulations of the bulk of turbulence only, eliminating the thermal and kinetic boundary layers and replacing them with periodic boundary conditions.