Experimental Estimation of Mixed-Mode Fracture Properties of Steel Weld

The modified Arcan fixture was used in order to investigate the mixed mode fracture properties of high strength steel butt weld through experimental and numerical analysis. The fixture consisted of a central section with "butterfly-shaped" specimen that had central crack. The specimens were under pure mode I (opening), pure mode II (shearing) and all in plane mixed mode loading angles starting from 0 to 90 degrees. The geometric calibration factors were calculated with the aid of finite element analysis for various loading mode and different crack length (0.45≤ a/w ≤0.55) and the critical fracture loads obtained experimentally. The critical fracture toughness (KIC & KIIC) estimated with experimental and numerical analysis under mixed mode loading conditions.

Authors:

• S. R. Hosseini
• N. Choupani
• A. R. M. Gharabaghi

Keywords:

• Arcan specimen
• fracture toughness
• mixed mode
• steel weld.

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