Comparison:
*Abalone*
Parallel σ = 240 MPa Perpendicular
σ = 550 MPa
•Abalone (optimized
structure) presents the highest mechanical strength
•Conch (over organized)
•In compression
weakness may be attributed to 45
deg shear angles
•Giant Clam (under organized)
50% Fracture
probability Stress (MPa)
Conch:
Parallel σ = 225 MPa Perpendicular σ = 170 MPa
Giant Clam:
Parallel
σ = 89 Mpa Perpendicular σ = 123 MPa
In the direction of highest strength
abalone showed over twice the compressive strength of conch and giant clam
QUASI-STATIC
COMPRESSION