کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6717096 | 1428746 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of specimen thickness on the fracture resistance of hot mix asphalt in the disk-shaped compact tension (DCT) configuration
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کلمات کلیدی
Hot mix asphalt - آسفالت مخلوط داغ3D scanning - اسکن سه بعدیFracture energy - انرژی شکستCoefficient of Variation - ضریب تغییرLinear Elastic Fracture Mechanics - مکانیک شکست خط elasticElastic-plastic fracture mechanics - مکانیک شکست خوردگی انعطاف پذیر پلاستیکیFracture toughness - چگرمگی شکست یا تافنِس شکست
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the effect of specimen thickness on the fracture resistance of a dense-graded hot mix asphalt (HMA) is investigated. The fracture toughness, Kc and fracture energy, Gf in triplicate DCT specimens with width-to-thickness ratios ranging from 1.46 to 4.4 is measured at 27â¯Â°C. The coefficient of variation (COV) of Kc and Gf is calculated to determine reliability as a function of thickness. Photos of cracked specimens and 3D surface scans are employed to study how the crack path and fracture surface changed with thickness. The ASTM specifications and linear-elastic fracture mechanics theory are applied to show that Kc does not reach a plane-strain condition, Kcâ KIc, for the given ratios. The average Kc increases with thickness while the COV is inconsistent with thickness. The average Gf is independent of thickness but the COV decreases with thickness; thus, Gf is thickness-dependent. The crack path and fracture surface cannot be used to identify the plane-stress or plane-strain condition due to large aggregates dominating the fracture process. A method for estimating the specimen thickness required for the plane-strain condition and a method to estimate the thickness at which fracture toughness is maximized is demonstrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 160, 30 January 2018, Pages 487-496
Journal: Construction and Building Materials - Volume 160, 30 January 2018, Pages 487-496
نویسندگان
Calvin M. Stewart, Chinedu W. Oputa, Eduardo Garcia,