抄録
Microdamage of healthy bovine cortical bone specimen and decalcified bone specimen during static compression tests was monitored by acoustic emission (AE) technique. Microdamage accumulation was successively monitored by AE technique. In static compression tests of healthy bone specimen, cracks were propagated due to microdamage accumulation, and cumulative AE events increased before final fracture. In static compression tests of decalcified bone specimen, macrocrack was observed with increasing in cumulative AE energy and cumulative AE events and decreasing in stress before fracture. Maximum stress and Young's modulus between healthy bone specimen and decalcified bone specimen had a significant difference. Those between specimen A (decalcified only specimen inside) and specimen B (decalcified specimen inside and outside) had no significant difference. Microdamage accumulation process of healthy bone specimen and decalcified bone specimen before leading to final fracture was shown by AE technique.
