Imperial College London
Alternate

Dr Mazdak Ghajari

Faculty of Engineering, Dyson School of Design Engineering

Reader in Brain Biomechanics
 
 
 
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Contact

 

+44 (0)20 7594 9236m.ghajari Website

 
 
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Location

 

Dyson BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ghajari:2014:10.1016/j.cma.2014.04.002,
author = {Ghajari, M and Iannucci, L and Curtis, P},
doi = {10.1016/j.cma.2014.04.002},
journal = {Computer Methods in Applied Mechanics and Engineering},
pages = {431--452},
title = {A peridynamic material model for the analysis of dynamic crack propagation in orthotropic media},
url = {http://dx.doi.org/10.1016/j.cma.2014.04.002},
volume = {276},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A new material model for the dynamic fracture analysis of anisotropic materials has been proposed within the framework of the bond-based peridynamic theory. This model enables predicting complex fracture phenomena such as spontaneous crack nucleation and crack branching, curving and arrest, a capability inherited from the bond-based peridynamic theory. An important feature of the model is that the bond properties, i.e. the stiffness constant and critical stretch, are continuous functions of bond orientation in the principal material axes. This facilitates fracture analysis of anisotropic materials with random orientations, such as polycrystalline microstructures. Elastic and fracture behaviour of the model has been verified through simulating uniaxial tension of a composite plate and fracture of a cortical bone compact tension specimen, and making quantitative comparisons to analytical and experimental data. To further demonstrate the capabilities of the proposed model, dynamic fracture of a polycrystalline microstructure (alumina ceramic) has been simulated. The influence of the grain boundary and grain interior fracture energies on the interacting and competing fracture modes of polycrystalline materials, i.e. intergranular and transgranular fracture, has been studied.
AU  - Ghajari,M
AU  - Iannucci,L
AU  - Curtis,P
DO  - 10.1016/j.cma.2014.04.002
EP  - 452
PY  - 2014///
SN  - 0045-7825
SP  - 431
TI  - A peridynamic material model for the analysis of dynamic crack propagation in orthotropic media
T2  - Computer Methods in Applied Mechanics and Engineering
UR  - http://dx.doi.org/10.1016/j.cma.2014.04.002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000337985100018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S004578251400111X?via%3Dihub
UR  - http://hdl.handle.net/10044/1/15351
VL  - 276
ER  -
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