scholarly journals Biomechanics of byssal threads outside the Mytilidae: Atrina rigida and Ctenoides mitis

2009 ◽  
Vol 212 (10) ◽  
pp. 1449-1454 ◽  
Author(s):  
T. Pearce ◽  
M. LaBarbera
Keyword(s):  
Atrina Rigida

Spiers Memorial Lecture : Lessons from biomineralization: comparing the growth strategies of mollusc shell prismatic and nacreous layers in Atrina rigida

2007 ◽  
Vol 136 ◽  
pp. 9 ◽  
Author(s):  
Fabio Nudelman ◽  
Hong H. Chen ◽  
Harvey A. Goldberg ◽  
Steve Weiner ◽  
Lia Addadi
Keyword(s):  
Memorial Lecture ◽  
Growth Strategies ◽  
Mollusc Shell ◽  
Atrina Rigida

scholarly journals Isotropic microscale mechanical properties of coral skeletons

2015 ◽  
Vol 12 (106) ◽  
pp. 20150168 ◽  
Author(s):  
Luca Pasquini ◽  
Alan Molinari ◽  
Paola Fantazzini ◽  
Yannicke Dauphen ◽  
Jean-Pierre Cuif ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Nacreous Layer ◽  
X Ray Diffraction ◽  
Stylophora Pistillata ◽  
Force Microscopy ◽  
Coral Skeletons ◽  
Atomic Force ◽  
Diffraction Patterns ◽  
The Relationship ◽  
Atrina Rigida

Scleractinian corals are a major source of biogenic calcium carbonate, yet the relationship between their skeletal microstructure and mechanical properties has been scarcely studied. In this work, the skeletons of two coral species: solitary Balanophyllia europaea and colonial Stylophora pistillata , were investigated by nanoindentation. The hardness H IT and Young's modulus E IT were determined from the analysis of several load–depth data on two perpendicular sections of the skeletons: longitudinal (parallel to the main growth axis) and transverse. Within the experimental and statistical uncertainty, the average values of the mechanical parameters are independent on the section's orientation. The hydration state of the skeletons did not affect the mechanical properties. The measured values, E IT in the 76–77 GPa range, and H IT in the 4.9–5.1 GPa range, are close to the ones expected for polycrystalline pure aragonite. Notably, a small difference in H IT is observed between the species. Different from corals, single-crystal aragonite and the nacreous layer of the seashell Atrina rigida exhibit clearly orientation-dependent mechanical properties. The homogeneous and isotropic mechanical behaviour of the coral skeletons at the microscale is correlated with the microstructure, observed by electron microscopy and atomic force microscopy, and with the X-ray diffraction patterns of the longitudinal and transverse sections.

Asprich: A Novel Aspartic Acid-Rich Protein Family from the Prismatic Shell Matrix of the Bivalve Atrina rigida

ChemBioChem ◽  
2005 ◽  
Vol 6 (2) ◽  
pp. 304-314 ◽  
Author(s):  
Bat-Ami Gotliv ◽  
Naama Kessler ◽  
Jan L. Sumerel ◽  
Daniel E. Morse ◽  
Noreen Tuross ◽  
...  
Keyword(s):  
Aspartic Acid ◽  
Protein Family ◽  
Shell Matrix ◽  
Prismatic Shell ◽  
Atrina Rigida

Calcite Prisms from Mollusk Shells (Atrina Rigida): Swiss-cheese-like Organic-Inorganic Single-crystal Composites

2011 ◽  
Vol 21 (11) ◽  
pp. 2028-2034 ◽  
Author(s):  
Hanying Li ◽  
Huolin L. Xin ◽  
Miki E. Kunitake ◽  
Ellen C. Keene ◽  
David A. Muller ◽  
...  
Keyword(s):  
Single Crystal ◽  
Swiss Cheese ◽  
Mollusk Shells ◽  
Atrina Rigida

scholarly journals Strategies for simultaneous strengthening and toughening via nanoscopic intracrystalline defects in a biogenic ceramic

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhifei Deng ◽  
Hongshun Chen ◽  
Ting Yang ◽  
Zian Jia ◽  
James C. Weaver ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Damage Tolerance ◽  
Strengthening Mechanism ◽  
Model System ◽  
Structural Motif ◽  
Precipitation Strengthening ◽  
Marine Bivalve ◽  
Mineral Phases ◽  
Organic Interfaces ◽  
Atrina Rigida

Abstract While many organisms synthesize robust skeletal composites consisting of spatially discrete organic and mineral (ceramic) phases, the intrinsic mechanical properties of the mineral phases are poorly understood. Using the shell of the marine bivalve Atrina rigida as a model system, and through a combination of multiscale structural and mechanical characterization in conjunction with theoretical and computational modeling, we uncover the underlying mechanical roles of a ubiquitous structural motif in biogenic calcite, their nanoscopic intracrystalline defects. These nanoscopic defects not only suppress the soft yielding of pure calcite through the classical precipitation strengthening mechanism, but also enhance energy dissipation through controlled nano- and micro-fracture, where the defects’ size, geometry, orientation, and distribution facilitate and guide crack initialization and propagation. These nano- and micro-scale cracks are further confined by larger scale intercrystalline organic interfaces, enabling further improved damage tolerance.

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