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| BIOMECHANICAL PROPERTIES OF DINOSAUR EGGSHELLS (Ⅲ)──THE MECHANIC ANALYSIS OF THE BABY DINOSAURS' EMERGING FROM THEIR EGGS | |
| 作者姓名： | Ma Hezhong (Beijing University ot Aefonautics and Astronautics Beijing 100083)She Dewei Zhao Zikui(Institute of Vertebrate paleontology and paleoanthropology Chinese Academy of Sciences Beijing 100044) |
| 作者单位： | Ma Hezhong (Beijing University ot Aefonautics and Astronautics，Beijing 100083)She Dewei; Zhao Zikui(Institute of Vertebrate paleontology and paleoanthropology，Chinese Academy of Sciences，Beijing 100044) |
| 摘 要： | Thepurposeofthispaperistoanalyzethestressofdinosaureggshellloadedbythehatch1ingswhentheyhatch,andfourtypesofdinosaureggshellsareavaila-ble(seeTablelofZhaoeta1.,l994;TablelofMaandZhao,1994).Mostofthelivingreptileshaveflexible,parchment-likeeggshellscomposedoffibresandrelativelysma1lamountsofcalciumcarbonate.Thchatchlings,eachequ-ippedwithasmalI,sharp"eggtooth",cracktheireggshel1stoemerge'However,theyoungbirdspokeatthebluntendoftheeggwiththeirbeak,thenstruggleoutfromtheireggs.Thehatchingproce… |
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