使用非对称 SCB 配置确定沥青复合材料混合物模式 II 破坏的临界应变能释放率

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-03-18 DOI:10.1016/j.tafmec.2025.104936

M.R.M. Aliha , S.M.N. Ghoreishi , A. Tavana , M. Molayem , N. Choupani

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In this paper, this concept is extended to propose an index (called JIIc) for investigating mode II failure resistance of HMA mixtures. To do that the strain energy values are determined at pure mode II using the multiple asymmetric SCB (ASCB) samples with different crack lengths. Using this method the JIIc value was determined at 25 °C for four HMA mixtures made of limestone aggrgate-60/70 bitumen (L60), limestone aggregate-85/100 bitumen (L85), siliceous aggregate-60/70 bitumen (S60) and siliceous aggregate-85/100 bitumen (S85). The corresponding values of JIIc for the investigated asphaltic mixtures varied from 3.5 to 7 kJ/m2 that were significantly higher than the JIc value of asphaltic mixtures. The JIIc value obtained from the L60 mixture was greater than the other mixtures and the S85 mixture showed the lowest JIIc. 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On determination of critical strain energy release rate for mode II failure of asphaltic composite mixtures using assymetric SCB configuration

Understanding the crack resistance of hot mix asphalt (HMA) composites under dominantly in-plane shear (mode II) at intermediate temperatures is an important issue for design and life assessment of asphaltic pavements. While at low temperatures the critical value of stress intensity factor (e.g. K_IIc) is often used as the fracture resistance index for asphalt mixtures, the J-index is probably a more reliable fracture parameter for medium temperatures to capture the inelastic behavior of HMA mixture. Accordingly, the concept of J-integral has been adopted for determining J_Ic value of bituminous mixtures under mode I using semi-circular bend (SCB) test. In this paper, this concept is extended to propose an index (called J_IIc) for investigating mode II failure resistance of HMA mixtures. To do that the strain energy values are determined at pure mode II using the multiple asymmetric SCB (ASCB) samples with different crack lengths. Using this method the J_IIc value was determined at 25 °C for four HMA mixtures made of limestone aggrgate-60/70 bitumen (L60), limestone aggregate-85/100 bitumen (L85), siliceous aggregate-60/70 bitumen (S60) and siliceous aggregate-85/100 bitumen (S85). The corresponding values of J_IIc for the investigated asphaltic mixtures varied from 3.5 to 7 kJ/m² that were significantly higher than the J_Ic value of asphaltic mixtures. The J_IIc value obtained from the L60 mixture was greater than the other mixtures and the S85 mixture showed the lowest J_IIc. In addition, corresponding values of critical mode II stress intensity factor and mode II fracture energy were determined for each mixture and their relationships with the J_IIc were investigated. In general, there were no proportional and linear relations between K_IIf, G_IIf and J_IIc in the HMA mixtures.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.