Untersuchungen zum Ermüdungsverhalten von Konstruktionsteilen für Mobilkrane

✍ Scribed by Geschäftsführer Hubert Hummel; Leiter Qualität Andreas Kern; Leiter Qualitätswesen Planung und Steuerung/Technisches Auftragsmanagement Udo Schriever

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: German
• Weight: 511 KB
• Volume: 75
• Category: Article
• ISSN: 0038-9145
• DOI: 10.1002/stab.200610098

✦ Synopsis

Fatigue behaviour of component sections of mobile cranes out of high strength steel plates. High-strength structural steels with 960 and/or 1100 MPa minimum yield strength allow a decrease of the investment and operating costs of mobile cranes through lightweight design. However, there still exists an uncertainity for stress resistance under cyclic loads and bearable stresses concerning fatigue behaviour of important crane components. This paper deals for the first time with the fatigue behaviour of crane components examined under realistic load-time-cycles derived from realistic crane operating conditions. The results supply important information on the service life. The service life depends in this case strongly from the tension level considerably. The influence of the here applied load-time-cycles appears on the other hand small.

Additionally, this paper provides a new tool with which the fatigue behaviour of crane components under most different aspects and involved variable combinations can be estimated, consistent with measured values, through a fracture mechanically based model.

There can be made important procedure recommendations and hints can be given for a more intense use of high-strength structural steels for practical application in mobile crane engineering. Inspection intervals and contents can be newly determined. The usage of steels with more than 1100 MPa minimum yield strength in the mobile crane building is evaluated crucially.