Imperial College London


Faculty of EngineeringDepartment of Mechanical Engineering

Professor of the Mechanics of Materials



+44 (0)20 7594 7246m.charalambides Website




516City and Guilds BuildingSouth Kensington Campus






BibTex format

@article{Skamniotis and Patel:2016:10.1098/rsfs.2016.0005,
author = {Skamniotis and Patel, Y and Charalambides, MN and Elliott, M},
doi = {10.1098/rsfs.2016.0005},
journal = {Interface Focus},
title = {Fracture investigation in starch based foods},
url = {},
volume = {6},
year = {2016}

RIS format (EndNote, RefMan)

AB - The study of oral processing and specifically cutting of the food piece during mastication can lead towards optimisation of products for humans or animals. Food materials are complex bio-composites with highly nonlinear constitutive response. Their fracture properties have not been largely investigated as yet while the need for models capable of predicting food breakdown increases. In this study, the blade cutting and the essential work of fracture (EWF) methodologies assessed the fracture behaviour of starch based pet-food. Tensile tests revealed rate dependent stiffness and stress softening effects, attributed to viscoplasticity and micro-cracking, respectively. Cutting data were collected for 5, 10 and 30 mm/s sample feed rates, whereas the EWF tests were conducted at 1.7, 3.3 and 8.3 mm/s crosshead speeds corresponding to average crack speeds of 4, 7 and 15 mm/s respectively. A reasonable agreement was achieved between cutting and EWF, reporting 1.26, 1.78, 1.76 kJ/m² and 1.52, 1.37, 1.45 kJ/m² values, respectively, for the corresponding crack speeds. These toughness data were used in a novel numerical model simulating the ‘first’ bite mastication process. A viscoplastic material model is adopted for the food piece, combined with a damage law which enabled predicting fracture patterns in the product.
AU - Skamniotis
AU - Patel,Y
AU - Charalambides,MN
AU - Elliott,M
DO - 10.1098/rsfs.2016.0005
PY - 2016///
SN - 2042-8901
TI - Fracture investigation in starch based foods
T2 - Interface Focus
UR -
UR -
VL - 6
ER -