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| BIOMECHANICAL PROPERTIES OF DINOSAUR EGGSHELLS (Ⅱ)──TWO BREAKING TYPES OF THE DINOSAUR EGGSHELLS UNDER EXTERNAL PRESSURE | |
| 作者姓名： | Ma Hezhong |
| 作者单位： | Ma Hezhong (Beijing University of Aeronautics and Astronautict，Beijing 100083)Zhao Zikui (Institute of Vertebrate Paleontology and Paleoanthropology，Academia Sinica，Beijing 100044) |
| 摘 要： | Thedinosaursburytheireggsinsandorearthforincubation.Assumingthatexertingexterna1forcesontheseeggswithinthenestareequa1distributionpressure,i.e.NQo=NBdi=O.Aftertreatingthestatisticalfiguresofthedinosaureggshe-lls,anon-dimensiona1contourcurveforinulacanbeobtained:inwhichUsingnumericalmethodsubstitutesthedifferentialwithcentraldifference:Thusthethreedifferenceexpressionsofcurvatureradiusoftheeggshe1lcanbeobtained:Usingnondimensionparameters:inwhichNoandNearenondimensi0nalinternalf0rcesal0ngth… |
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