Fracture of metals as a random process-strength spaces

✍ Scribed by Donka Angelova; Angel Dishliev; Ivailo Vasilev; Lilly Slavtcheva

• Publisher: Springer Netherlands
• Year: 1992
• Tongue: English
• Weight: 298 KB
• Volume: 58
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00019978

✦ Synopsis

Metal behaviour under load is described by different approaches: statistical, including its reliability; after Zhurkov, considering temporary strength or durability of metal; after Griffith, defining its critical strength.

The present study describes, based on random process theory, life and fracture of metals under load, integrating the possibility of Zhurkov's and Griffith's approaches, defining the bounds: 'perfect metal (Zhurkov) -metal with a crack (Griffith)'. The aim is a presentation of a complete history of each defined metal in the interval 'load imposing-fracture'.

Tensile strengths csrs , and yield strengths (s,,i, (i=1,2 ..... 50) are studied by testing two series of aluminium specimens (50 lest specimens per set) at 293K and 373K on a universal testing machine FPZ-100; the strain rate is dL/dt = 0.83.103m/s. The durability of the time for fracture x i for all specimens is experimentally obtained.

' ST 9

and pTS,293%)-2' Int Journ of Fracture 58 (1992)