Chipping Brittle Materials: A Finite Element Analysis

Seyed Saleh Mostafavi; Liang Chi Zhang; Jason Lunn

doi:10.4028/www.scientific.net/KEM.443.433

Paper Titles

Study on NC Compliant Bonnet Tool Abrasive Polishing Based on Magnetorheological Torque Servo
p.411

Molecular Dynamics Simulation of Rubbing Phenomena in Ultra-Precision Abrasive Machining
p.417

Modeling of Depth of Cut in Abrasive Waterjet Cutting of Thick Kevlar-Epoxy Composites
p.423

Prediction of Erosion Profiles during ECM of Spiral Holes
p.428

Chipping Brittle Materials: A Finite Element Analysis
p.433

Research on the Removal Mechanism of Engineering Ceramics Based on Energy Density
p.439

Research on Tooth Trace Modification of Spur Bevel Gear
p.445

In Situ Observation and Anisotropy of Free Surface Roughening for Polycrystalline Metals
p.450

Edge Chipping of Rock: An Experimental Study
p.456

HomeKey Engineering MaterialsKey Engineering Materials Vol. 443Chipping Brittle Materials: A Finite Element...

Chipping Brittle Materials: A Finite Element Analysis

Abstract:

Edge chipping by an indenter has been used to investigate the fragmentation of brittle materials. This paper proposed a constitutive model for studying both the initiation and propagation of cracks during the chipping of concrete. The analysis was carried out by the finite element method using a commercially available code, LS-DYNA. The results showed that a zone with very high compressive stresses appears beneath the indenter and causes the material to break or crush. Most of the external work, about 78%, was dissipated in the crushing zone while only a small percentage (less than 17%) contributed to form chips/fragments. As the indentation proceeded, radian-median cracks initiated and propagated downward and parallel to the front surface of the material to form a half penny crack. The crack tips from both sides of the indenter on the surface would then deviate toward the free edge, leading to a chipping scallop at a critical load.