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2篇 您的检索式：作者名="C.Berthold"

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		题名	作者	年代	出处	被引量
	1	Sea Urchin Spines as a Model-System for Permeable,Light-Weight Ceramics with Graceful Failure Behavior. Part I. Mechanical Behavior of Sea Urchin Spines under Compression显示文摘The spines of pencil and lance urchins Heterocentrotus mammillatus and Phyllacanthus imperialis were studied as a modelof light-weight material with high impact resistance.The complex and variable skeleton construction ('stereom') of body andspines of sea urchins consists of highly porous Mg-bearing calcium carbonate.This basically brittle material with pronouncedsingle-crystal cleavage does not fracture by spontaneous catastrophic device failure but by graceful failure over the range of tensof millimeter of bulk compression instead.This was observed in bulk compression tests and blunt indentation experiments onregular,infiltrated and latex coated sea urchin spine segments.Microstructural characterization was carried out using X-raycomputer tomography,optical and scanning electron microscopy.The behavior is interpreted to result from the hierarchicstructure of sea urchin spines from the rnacroscale down to the nanoscale.Guidelines derived from this study see ceramics withlayered porosity as a possible biomimetic construction for appropriate applications.	V.Presser S.SchultheiB C.Berthold K.GNickel	2009	Journal of Bionic Engineering2009，6，3：	5
	2	Sea Urchin Spines as a Model-System for Permeable,Light-Weight Ceramics with Graceful Failure Behavior.Part Ⅱ.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression显示文摘Sea urchin spines were chosen as a model system for biomimetic ceramics obtained using starch-blended slip casting.Porous alumina ceramics with cap-shaped layers with different alternating porosities were found to have superior fracturebehavior under bulk compression compared to ceramics with uniform porosity.They fail in a cascading manner,absorbing highamounts of energy during extended compression paths.The porosity variation in an otherwise single phase material mimicks thearchitectural microstructure design of sea urchin spines of Heterocentrotus mammillatus,which are promising model materialsfor impact protection.	V.Presser C.Kohler Z.Zivcová C.Berthold K.G.Nickel S.Schultheiβ E.Gregorová W.Pabst	2009	Journal of Bionic Engineering2009，6，4：	1

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