Αστοχία ρηγματομένων όλκιμων πλακών με δύο συμμετρικές εγκοπές

The objective of this dissertation is to study the interaction between a crack and two symmetrical edge notches perpendicular to the plane of the crack. Based on the strain energy density criterion the critical stress for crack growth initiation is determined. The influence of body geometry as it is dictated by notch radius, crack length and distance between crack and notches on the critical stress is studied and important results are established. Crack growth initiation followed by stable crack growth which is also studied by strain energy density criterion. The global minimum of the strain energy density in function from which the crack trajectory passes during unstable crack growth is also determined. The distance between this point and the crack tip plans an important role for the determination of the stability of the body with cracks. The smaller this distance the non stable the body.

Grantor dc:publisher

National Technical University of Athens (NTUA)

Year dc:date

1991

Authors dc:creator

• Thireos, C.
• Θηραιός, Κωνσταντίνος

• Εγκοπές
• Ελαστοπλαστική συμπεριφορά
• Έναρξη διάδοσης ρωγμής
• Ευστάθεια σώματος
• Ευσταθής και ασταθής διάδοση ρωγμής
• Όλκιμη θραύση
• Πεπερασμένα στοιχεία
• Ρωγμές
• Τροχιά διάδοσης ρωγμής
• Crack
• Crack trajectory
• Crackgrowth initiation
• Ductile fracture
• Elastic-plastic behavior
• Finite elements
• Notches
• Stability of a body
• Stable and unstable crack growth
• Επιστήμες Μηχανικού και Τεχνολογία
• Μηχανική Υλικών
• Engineering and Technology
• Materials Engineering

Language dc:language

gre

Identifier

10.12681/eadd/1695

OAI identifier oai:identifier

oai:10442/1695