Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity
This paper analyzes the notch effect on the fracture behavior of two biomaterials (a brittle bone cement and a ductile dental material) under mode I loading. U-notched Brazilian disk (UNBD) specimens of both materials were tested under remote compression, determining the corresponding fracture loads...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-11-01
|
Series: | Applied Sciences |
Subjects: | |
Online Access: | https://www.mdpi.com/2076-3417/10/23/8445 |
id |
doaj-a50bdea335af4ce79482e229e3a1b5fe |
---|---|
record_format |
Article |
spelling |
doaj-a50bdea335af4ce79482e229e3a1b5fe2020-11-27T08:11:48ZengMDPI AGApplied Sciences2076-34172020-11-01108445844510.3390/app10238445Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip PlasticitySahel Shahbaz0Majid Reza Ayatollahi1Ali Reza Torabi2Sergio Cicero3Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, IranFatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, IranFracture Research Laboratory, Faculty of New Science and Technologies, University of Tehran, Tehran 16846, IranLaboratory of Materials Science and Engineering, University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Av/Los Castros 44, 39005 Santander, SpainThis paper analyzes the notch effect on the fracture behavior of two biomaterials (a brittle bone cement and a ductile dental material) under mode I loading. U-notched Brazilian disk (UNBD) specimens of both materials were tested under remote compression, determining the corresponding fracture loads and load-displacement curves. Additionally, cracked rectangular and semicircular bend (SCB) specimens were tested under symmetric three-point bending in order to determine the fracture toughness of the two materials. Then, fracture loads were derived theoretically by applying the maximum tangential stress (MTS) and the mean stress (MS) criteria. Due to the brittle linear elastic behavior of the bone cement material, the MTS and MS criteria were directly applied to this material; however, given the significant nonlinear behavior of the dental material, the two fracture criteria were combined with the Equivalent Material Concept (EMC) for the fracture analyses of the dental material specimens. The results reveal a very good accuracy of both the MTS and the MS criteria for the fracture analysis of bone cement notched specimens. In the case of the dental material, very good results are also obtained when combining the MTS and the MS criteria with the EMC. The proposed approach can be useful for the fracture analysis of a wide range of biopolymers, from brittle to ductile behavior.https://www.mdpi.com/2076-3417/10/23/8445biomaterialnotch effectbrittle fractureductile fractureequivalent material concept (EMC) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sahel Shahbaz Majid Reza Ayatollahi Ali Reza Torabi Sergio Cicero |
spellingShingle |
Sahel Shahbaz Majid Reza Ayatollahi Ali Reza Torabi Sergio Cicero Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity Applied Sciences biomaterial notch effect brittle fracture ductile fracture equivalent material concept (EMC) |
author_facet |
Sahel Shahbaz Majid Reza Ayatollahi Ali Reza Torabi Sergio Cicero |
author_sort |
Sahel Shahbaz |
title |
Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity |
title_short |
Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity |
title_full |
Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity |
title_fullStr |
Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity |
title_full_unstemmed |
Fracture Behavior of Two Biopolymers Containing Notches: Effects of Notch Tip Plasticity |
title_sort |
fracture behavior of two biopolymers containing notches: effects of notch tip plasticity |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-11-01 |
description |
This paper analyzes the notch effect on the fracture behavior of two biomaterials (a brittle bone cement and a ductile dental material) under mode I loading. U-notched Brazilian disk (UNBD) specimens of both materials were tested under remote compression, determining the corresponding fracture loads and load-displacement curves. Additionally, cracked rectangular and semicircular bend (SCB) specimens were tested under symmetric three-point bending in order to determine the fracture toughness of the two materials. Then, fracture loads were derived theoretically by applying the maximum tangential stress (MTS) and the mean stress (MS) criteria. Due to the brittle linear elastic behavior of the bone cement material, the MTS and MS criteria were directly applied to this material; however, given the significant nonlinear behavior of the dental material, the two fracture criteria were combined with the Equivalent Material Concept (EMC) for the fracture analyses of the dental material specimens. The results reveal a very good accuracy of both the MTS and the MS criteria for the fracture analysis of bone cement notched specimens. In the case of the dental material, very good results are also obtained when combining the MTS and the MS criteria with the EMC. The proposed approach can be useful for the fracture analysis of a wide range of biopolymers, from brittle to ductile behavior. |
topic |
biomaterial notch effect brittle fracture ductile fracture equivalent material concept (EMC) |
url |
https://www.mdpi.com/2076-3417/10/23/8445 |
work_keys_str_mv |
AT sahelshahbaz fracturebehavioroftwobiopolymerscontainingnotcheseffectsofnotchtipplasticity AT majidrezaayatollahi fracturebehavioroftwobiopolymerscontainingnotcheseffectsofnotchtipplasticity AT alirezatorabi fracturebehavioroftwobiopolymerscontainingnotcheseffectsofnotchtipplasticity AT sergiocicero fracturebehavioroftwobiopolymerscontainingnotcheseffectsofnotchtipplasticity |
_version_ |
1724413614144618496 |