Simulation of Fracture of Concrete Using Micropolar Peridynamics

The main goal of the thesis is to develop a constitutive damage model for simulating tensile fracture of concrete using the micropolar peridynamics model. Micropolar peridynamics was proposed by Gerstle in 2007 as a generalization to the bond based peridynamics method introduced by Silling in 2000, which was only capable of handling materials with specific Poissons ratios. Inspired by the bilinear cohesive model in the cohesive crack approach, a new constitutive damage model is proposed to simulate the tensile fracture of a normal-strength concrete. Laboratory experimental data for crack mouth opening displacement vs. load of notched beams, obtained by Chapman in 2011 which are of three different sizes, are used to calibrate the model. It is shown that the simulation results obtained from modeling match very well with those from laboratory experiments, and the size of the fracture process zone, the damage, and cracking patterns are match experiment as well. As a part of the research the isotropicity of the hexagonal particle lattice , proposed by Gerstle in 2011 and used in our simulations, is shown analytically, and the critical time step of the explicit time integration method, which is used to solve the governing equations, is determined.'

Name thesis:degree_name

Civil Engineering

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Civil Engineering

Year

2014

Author dc:creator

• Aziz, Asadollahi

Contributors dc:contributor

• Gerstle, Walter Jr
• Ross, Timothy Jr
• Arup, Maji Jr

• Peridynamics
• Concrete
• Fracture

Language dc:language

English

Identifier

https://digitalrepository.unm.edu/ce_etds/97

OAI identifier oai:identifier

oai:digitalrepository.unm.edu:ce_etds-1098