摘要
The objective of this work is to analyze the fatigue reliability of complex welded structures composed of multiple web-frame joints, accounting for correlation effects. A three-dimensional finite element model using the 20-node solid elements is generated. A linear elastic finite element analysis was performed, hotspot stresses in a web-frame joint were analyzed and fatigue damage was quantified employing the S-N approach. The statistical descriptors of the fatigue life of a non-correlated web-frame joint containing several critical hotspots were estimated. The fatigue reliability of a web-frame joint wasmodeled as a series system of correlated components using the Ditlevsen bounds. The fatigue reliability of the entire welded structure with multiple web-frame joints, modeled as a parallel system of non-correlated web-frame joints was also calculated.
The objective of this work is to analyze the fatiguereliability of complex welded structures composed of multipleweb-frame joints, accounting for correlation effects. Athree-dimensional finite element model using the 20-node solidelements is generated. A linear elastic finite element analysis wasperformed, hotspot stresses in a web-frame joint were analyzed andfatigue damage was quantified employing the S-N approach. Thestatistical descriptors of the fatigue life of a non-correlatedweb-frame joint containing several critical hotspots were estimated.The fatigue reliability of a web-frame joint wasmodeled as a seriessystem of correlated components using the Ditlevsen bounds. Thefatigue reliability of the entire welded structure with multipleweb-frame joints, modeled as a parallel system of non-correlatedweb-frame joints was also calculated.
基金
Supported by the RISPECT-SCP7-GA-2008-218499
