. . . . "the measure of a material’s resistance to crack growth." . . . "Fracture toughness" . "fracture toughness of material" . . . . . "Christos Vasileiou" . "2026-01-28T10:02:30.072Z"^^ . . . . . . . . . . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz1OobdRASd9SftHrLhG905OXjv8DHndvyWzXRJ5EDFPankMSnHZPHK+g2qEeRWdonstt55CLrpTpWsVv9xRtTqPidXHbnWLBXX42iCB+EnZNoKqAVKF5GxkSR38S0uTTq3aeQJbw2kTpx6LMkspmuH95fgAI/lfqPWrxdlI98jIeHQ14UXZpiWmkkvPgC9GVgmwHiG1hB/NCA2fKCOxVodN44OfhAPtkWmPJ40IcGPSalI4HRqgLLI5PabdRk3PiG81cUngmQU1Xk6EapzkRJGenkOlGsC5L4ktEPO6LS9uBMLTMLQDtGtkrcwqg5HmeKv7Ili3vgr3LL8/GaBBOLQIDAQAB" . "Ptd8gs52PSQbdF5/HisxWNDrrC5Rjl0f2jNewfOWfZHoC9Jb+Inl9XwkeQgeN8cAyA8olPGsuwg25hAV1d4O7zqygr+d4MysxNqddcj9ymAMTh5Io2qVSyRjwX/pneQkYaG4dgZAhFkJBdmHqwyBjal6izLmn2kmNDfKKBJsPf5ZgkgCedmCu1rLsDoEh2Ae2O0mXyVza29D6Ai2n+PgU3kArt3pRo0b9OFSZh9w2NpPsPPxRbHVwjNXI85KpqvFc4scrkNRB/Qy+u9tRgNBnH98ocGWW6XdDWs30yMGiCLb7J4pyzWF5fN3a+XHgAgb7RrNxlv9SWwR2mU6ymXFTg==" . . .