modelbasedidentificationofmechanicalcharacteristicsofsinosaurustheropodacrests

IVPP-IR

	modelbasedidentificationofmechanicalcharacteristicsofsinosaurustheropodacrests
	Xing Lida 1; Wang Yikun 2; Snively Eric 3; Zhang Jianping 1; Dong Zhiming 4; Burns Michael E 5; Currie Philip J 5
	2015
发表期刊	actageologicasinicaenglishedition
ISSN	1000-9515
卷号	89 期号:1 页码:1
摘要	The paired cranial crests of Sinosaurus (Theropoda) have been hypothesized as too weak to resist mechanical loads during combat. Finite element analysis (FEA) is used to test this hypothesis, first with geometry obtained through direct laser scanning of a well-preserved fossil of the crest, and then with two conceptual FE models of both crests analyzing the structure-deformation effects of fenestration. In the original fossil model, under direct loading on the dorsal faces of the crest, we found that the areas surrounding cavities on the crest experience shear stress that implies a high chance of material failure the fracture of bone. In the conceptual model, a series of computational studies were conducted with varying loading directions. One simulation found that the shear stress and strain in the material around the cavity presented more deformation compared with the conceptual model without the cavities, and under this morphologically realistic scenario the loading conditions would result in local bone fractures. These model-based computational results indicate that the crest could not resist high loads, because it could not effectively decentralize the loading stress. Future investigations need to focus on more comprehensive computational experiments with more conditions, e.g. dynamical loading conditions, and direct palaeontological evidence.
语种	英语
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/10407
专题	中国科学院古脊椎动物与古人类研究所
作者单位	1.School of the Earth Sciences and Resources, China University of Geosciences 2.奥克兰大学 3.俄亥俄大学 4.中国科学院古脊椎动物与古人类研究所 5.阿尔伯塔大学
推荐引用方式 GB/T 7714	Xing Lida,Wang Yikun,Snively Eric,et al. modelbasedidentificationofmechanicalcharacteristicsofsinosaurustheropodacrests[J]. actageologicasinicaenglishedition,2015,89(1):1.
APA	Xing Lida.,Wang Yikun.,Snively Eric.,Zhang Jianping.,Dong Zhiming.,...&Currie Philip J.(2015).modelbasedidentificationofmechanicalcharacteristicsofsinosaurustheropodacrests.actageologicasinicaenglishedition,89(1),1.
MLA	Xing Lida,et al."modelbasedidentificationofmechanicalcharacteristicsofsinosaurustheropodacrests".actageologicasinicaenglishedition 89.1(2015):1.