Dr. Walter Gerstle Presented at Symposium at Cornell University

October 27, 2014

Dr. Walter Gerstle, Professor of Civil Engineering, recently presented at a symposium at the School of Civil and Environmental Engineering at Cornell University.  The theme of the symposium was Computer Simulation and Physical Testing of Complex Fracturing Processes. 

walter gerstle presents

The title of his presentation, State-Based Peridynamic Lattice Modeling of Reinforced Concrete Structures, is summarized as follows.  Continuum peridynamics provides an alternative to continuum mechanics. However, peridynamics is more general because it allows cracks to emerge. However, peridynamics requires further discretization to be implemented on a computer.  Peridynamics assumes the material space is a continuous Cartesian real space. In contrast, in this paper we assume the material space is a discrete Cartesian integer space, defining a regular lattice of material particles, and proceed to develop the state-based peridynamic lattice model (SPLM).  With the SPLM, the forces between neighboring particles are characterized by the force state, T, and the stretches between particles are characterized by the deformation state, Y. The material model arises from a peridynamic function relating the force state to the deformation state. With the SPLM, continuous deformations, elasticity, damage, plasticity, cracks, and fragments can be simulated in a coherent and simple manner.  With the ongoing increase in computational storage capacity and processing power, the SPLM becomes increasingly competitive with more traditional continuum approaches like the finite element method.  

Dr. Gerstle graduated from Cornell in 1986 with his PhD degree.