Conclusions
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nThe abalone shell has higher mechanical strength then conch and giant clam shells.
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nOver organization with 45 degree shear angles in micro structure of Conch shells results in under-optimized mechanical response in compression.
¨Structure shows impressive response in tension.
nCompression : tension ratio of approx 4 (most ceramics have a ratio in the range of 10)
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nGrowth rates, and continuous single growth crystals may attribute to less organization and strength in Giant Clam.
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nHydration of shells with seawater, increased toughness over time.
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