کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7168924 1463036 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A cohesive element with degradation controlled shape of the traction separation curve for simulating stress corrosion and irradiation cracking
ترجمه فارسی عنوان
یک عنصر تجمعی با شکل تخریب شده کنترل منحنی جداسازی کششی برای شبیه سازی خوردگی استرس و ترک خوردگی تابش
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
A cohesive element with extended environmental degradation capability was developed and implemented into an Abaqus user element. The element uses a virgin and a fully degraded Traction Separation Law (TLS) as input. The use of the potential based PPR model enables flexibility in the softening shapes for both TSL. When the element is degraded, the TSL gradually goes from the shape of the virgin material to the fully degraded TSL shape. This transition was made with a new parameter χ that can govern a more ductile or brittle crack growth behaviour at degradation. The effect on the plastic zone due to changing the softening shape is shown, where the convex shaped softening TSL gives higher plastic dissipation and larger plastic zones than the concave and more brittle TSL. The new degradation method was evaluated against a Hydrogen Embrittlement (HE) experiment showing improved agreement with the experiment compared to the literature. The effect of different susceptibility zones at the crack tip was also investigated, showing that a uniform degradation throughout the susceptible zone is more influenced by the χ parameter than a triangular susceptible zone.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 193, 15 April 2018, Pages 172-196
نویسندگان
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