تم إجراء نمذجة اختبارات الشد و الانحناء لوصلات لحامية مختلفة الشكل, و التصميم و كذلك حساب إجهاد البقعة الحمراء في مناطق الانهيار الحرجة بطريقة تحليل العناصر المنتهية, فكان هناك توافق كلي جيد بين المواقع الحرجة المحددة تجريبياً في دراسات مرجعية موثقة و بين نتائج النمذجة.
لقد تبين أن ما تمت الإشارة له في لوائح المعهد الدولي للحام فما يتعلق بطريقة إجهاد البقعة الحمراء، تعطي قيم تقريبية دقيقة نسبياً حول إمكانية احتفاظ الوصلات المحملة على التعب بمعظم خواصها الميكانيكية المرغوبة, حتى تلك الوصلات التي يمكن أن تنهار فقط عند منطقة اتصالها بالمعدن الأساس.
Tensile and bending tests modeling have been undertaken for various welded joints
which were different in shape and design. Also, the hot spot stress was calculated at critical
failure areas using the finite elements analysis method. There was a good similarity
between experimentally defined critical areas in certain certified literature and those in our
modeling. It appeared that the information listed in the international institute for welding
(IIW) in regards of hot spot stress method gives relatively accurate values for the welded
joints possibility to endure fatigue loading and keep their desired mechanical properties
even those joints that could fail only at the connecting area with the base metal.
References used
Wang, Z,Y؛Wang, Q,Y . Finite element based fatigue assessment of corrugated steel beams in highway bridges .china,2015,419- 431
HOBBACHER, A.Recommendations for fatigue design of welded joints and components.. Paris: International Institute of Welding، 1996. Document XIII-1539-96/XV- 845-96
NIEMI, EJ. Recommendations concerning stress determination for fatigue analysis of welded components.In:International Institute of Welding Cambridge (UK): Abington Publishing,1995, Document XIII-1458-92/XV-797-92
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