Adhesive and Cohesive Cracking Analysis of Asphalt Mastics in Contact with Steel Substrates Using an Energy-Based Crack Initiation Criterion
نویسندگان
چکیده
Adhesive and cohesive properties play a vital role in the durability of asphalt mixtures. As result lack models characterizing adhesive cracking, occurrence failure has not been fully formulated by using an explicit mechanical approach. Strain energy density intact mastics is transformed into surface energies as cracks initiate. This study developed energy-based crack initiation criterion based on Griffith model differentiated cracking. The onset cracking was identified deviation measured stress from linear viscoelastic stress. released strain at balanced increase energies, thus creating new surface. Several fracture parameters such initial size, stress, tensile strength were proposed to analyze effects sample thickness, rate, temperature, filler concentration mastics. Results indicate that energy, significantly depend mastic test temperature but independent thickness rate. In particular, variation 20 °C 35 reaches 127.4%, its decrease up 46.9% varies 0 60%. 160 μm 1000 results 150.0% growth size 74.4% reduction Therefore, increasing can essentially improve toughness resist decreasing enhances loading capacity. It provides deep understanding mixture perspective energies.
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ژورنال
عنوان ژورنال: Sustainability
سال: 2023
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su15054415