Metals, polymers, and ceramics have many differences when it comes to fracture apart from simple ductile/brittle nature. Ceramics tend to have very low fracture toughness values and are susceptible to slow crack growth via stress corrosion, for example. They also tend to vary more in yield strength than metals or polymers. They are also 10-15X stronger in compression than tension.
Polymers can be ductile or brittle depending on temperature, loading condition, or nature of bonding (network vs van der Waals between chains). Polymers can also get toughening enhancement due to crazing where chain entanglement across crack helps prevent crack opening.
Негізгі бет Fracture characteristics of ceramics, polymers, and metals
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