On determination of critical strain energy release rate for mode II failure of asphaltic composite mixtures using assymetric SCB configuration

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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引用次数: 0

Abstract

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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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

研究热拌沥青复合材料在中温条件下面内剪切（II型）的抗裂性能是沥青路面设计和寿命评估的重要课题。在低温下，应力强度因子的临界值（如KIIc）常被用作沥青混合料的抗断裂指标，而在中等温度下，j指数可能是一个更可靠的断裂参数，以捕捉HMA混合料的非弹性行为。据此，采用j积分的概念，利用半圆弯曲试验确定沥青混合料在I型下的JIc值。在本文中，这一概念得到了扩展，提出了一个指数（称为JIIc）来研究HMA混合料的II型破坏抗力。为此，采用不同裂纹长度的多个非对称SCB （ASCB）试样，在纯模态II下确定了应变能值。用这种方法测定了石灰石骨料-60/70沥青（L60）、石灰石骨料-85/100沥青（L85）、硅质骨料-60/70沥青（S60）和硅质骨料-85/100沥青（S85）组成的四种HMA混合物在25℃下的JIIc值。所研究的沥青混合料的JIIc值在3.5 ~ 7 kJ/m2之间，明显高于沥青混合料的JIIc值。L60混合料的JIIc值大于其他混合料，S85混合料的JIIc值最低。此外，确定了每种混合物的临界II型应力强度因子和II型断裂能的对应值，并研究了它们与JIIc的关系。总体而言，HMA混合物中KIIf、GIIf和JIIc之间不存在正比关系和线性关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.