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Microstructure-dictated resistance properties of some Indian dinosaur eggshells: finite element modeling

By Rahul Srivastava, Ashok Sahni, Syed A. Jafar and Sanjay K. Mishra


Finite element modeling (FEM) has been used to evaluate microstructure-controlled stability of selected eggshells of Indian dinosaurs. Our study suggests that under static load the eggshell microstructure of Megaloolithus cylindricus displays a low magnitude of tensile stress over most of the spherolith. The magnitude of this tensile stress is lower than that displayed in M. jabalpurensis, M. baghensis, and Subtiliolithus kachchhensis. In M. cylindricus, a shell thickness matching the length of the spheroliths prevents the failure of eggshells, whereas in M. jabalpurensis and M. baghensis, which have thinner shells, the development of additional subspheroliths compensates for the relatively higher magnitude of tensile stresses. Extremely thin eggshell in S. kachchhensis shows a still higher magnitude of tensile stresses, thereby making it prone to cracking, but the propagation of cracks is apparently checked and stability reinforced by wider spacing of pore canal

Topics: 090302 Biomechanical Engineering, 060399 Evolutionary Biology not elsewhere classified, 060206 Palaeoecology, 040308 Palaeontology (incl. Palynology), dinosaurs, Finite Element Modelling, Megaloolithus cylindricus
Publisher: The Paleontological Society details at - http://www.paleosoc.org
Year: 2005
DOI identifier: 10.1666/0094-8373(2005)031
OAI identifier: oai:eprints.qut.edu.au:7837
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