scholarly journals Mode I Fracture Behaviors between Cement Concrete and Asphalt Concrete Layer

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zhongping Tang ◽  
Fanglin Huang ◽  
Hua Peng
Keyword(s):  
Asphalt Concrete ◽  
Interface Roughness ◽  
Mode I ◽  
J Integral ◽  
Mode I Fracture ◽  
Pavement Maintenance ◽  
Asphalt Overlay ◽  
Bonding Performance ◽  
Tack Coat ◽  
Common Strategy

Asphalt overlay or concrete overlay on existing pavements is a common strategy for pavement maintenance. Interlayer bonding performance between asphalt and concrete layers is a critical concern in achieving optimal long-term structural performance due to the possible cracking along the interface. In this study, bonding behaviors of asphalt concrete interface were characterized by employing mode I fracture tests conducted at −10 and 25°C, respectively. Two typical interface conditions were manually prepared. A tack coat material was applied on the interface with four distinct rates: 0.1, 0.2, 0.3, and 0.4 L/m2. Parameters including fracture strength, stress intensity factor (KIC), facture energy (GF), and energy release rate (J integral) were selected to evaluate the fracture performance. Results showed that optimum tack coat rates were 0.1 and 0.3 L/m2 for specimens with unmilled and milled surfaces. At the optimum tack coat rates, KIC and GF increased with the increase of interface roughness at −10°C, while, at 25°C, J integral of specimens with unmilled interface was larger than that of specimens with milled interface at the optimum tack coat rates. Analysis of variance (ANOVA) was conducted to evaluate the significance of the factors on the fracture loads and found that surface roughness is significant at −10°C and becomes nonsignificant at 25°C. Temperature and tack coat rate were significant factors considering a given interface.

Influence of specimen geometry on mode I fracture toughness of asphalt concrete

2021 ◽  
Vol 276 ◽  
pp. 122181
Author(s):  
Si Fuan ◽  
Ma Ke ◽  
Liu Kanghe ◽  
Li Kun ◽  
M.R.M. Aliha
Keyword(s):  
Fracture Toughness ◽  
Asphalt Concrete ◽  
Specimen Geometry ◽  
Mode I ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness

scholarly journals Multi-parametric characterization of mode I fracture toughness of asphalt concrete: Influence of void and RA contents, binder and aggregate types

2018 ◽  
Vol 11 (3) ◽  
pp. 274-284 ◽  
Author(s):  
Saannibe Ciryle Somé ◽  
Montassar Abdhelack Fredj ◽  
Mai-Lan Nguyen ◽  
Arnaud Feeser ◽  
Alexandre Pavoine
Keyword(s):  
Fracture Toughness ◽  
Asphalt Concrete ◽  
Mode I ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness

On Approximately Realizing and Characterizing Pure Mode-I Interface Fracture Between Bonded Dissimilar Materials

2011 ◽  
Vol 78 (3) ◽  
Author(s):  
Zhenyu Ouyang ◽  
Gefu Ji ◽  
Guoqiang Li
Keyword(s):  
Mixed Mode ◽  
Dissimilar Materials ◽  
Interfacial Fracture ◽  
Interface Fracture ◽  
Mode I ◽  
Mode Ii ◽  
Pure Mode ◽  
J Integral ◽  
Mode I Fracture ◽  
Fracture Behaviors

Bimaterial systems in which two dissimilar materials are adhesively joined by a thin adhesive interlayer have been widely used in a variety of modern industries and engineering structures. It is well known that interfacial fracture is the most common failure mode for these bimaterial systems. Particularly, the interface fracture is a mixed mode in nature mode-I (pure peel) and mode-II (pure shear) due to the disrupted symmetry by the bimaterial configuration. Obviously, characterizing individual fracture modes, especially mode-I fracture, is essential in understanding and modeling the complex mixed mode fracture problems. Meanwhile, the J-integral is a highly preferred means to characterize the interfacial fracture behaviors of a bimaterial system because it cannot only capture more accurate toughness value, but also facilitate an experimental characterization of interfacial traction-separation laws (cohesive laws). Motivated by these important issues, a novel idea is proposed in the present work to realize and characterize the pure mode-I nonlinear interface fracture between bonded dissimilar materials. First, a nearly pure mode-I fracture test can be simply realized for a wide range of bimaterial systems by almost eliminating the mode-II component based on a special and simple configuration obtained in this work. Then, the concise forms of the J-integral are derived and used to characterize the interfacial fracture behaviors associated with classical and shear deformation beam theories. The proposed approach may be considered as a promising candidate for the future standard mode-I test method of bimaterial systems due to its obvious accuracy, simplicity, and applicability, as demonstrated by the numerical and experimental results.

scholarly journals Comparison of Testing Method Effects on Cracking Resistance of Asphalt Concrete Mixtures

2021 ◽  
Vol 11 (11) ◽  
pp. 5094
Author(s):  
Dayong Yang ◽  
Hamid Reza Karimi ◽  
Mohammad Reza Mohammad Aliha
Keyword(s):  
Fracture Toughness ◽  
Asphalt Concrete ◽  
Mode I ◽  
Pure Mode ◽  
Mode I Fracture ◽  
Three Point Bending ◽  
Mode I Fracture Toughness ◽  
Applied Loading ◽  
Concrete Mixtures ◽  
Edge Notch

As an inherent characteristic of materials, the fracture toughness is an important parameter to study the cracking behavior of asphalt concrete mixtures. Although material compositions and environmental conditions have a significant effect on the fracture toughness, for a certain material and testing environment, the test condition including the specimen configuration and loading type may also affect the obtained fracture toughness. In this paper, the effect of specimen configuration and applied loading type on the measured pure mode-I fracture toughness (KIc) is investigated. In order to achieve this purpose, using a typical asphalt mixture, four different test specimens including Semi-Circular Bend (SCB), Edge Notch Disc Bend (ENDB), Single Edge Notch Beam (SENB) and Edge Notch Diametral Compression (ENDC) disc are tested under pure mode I. The mentioned specimens have different shapes (i.e., full disc, semi-disc and rectangular beam) and are loaded either with symmetric three-point bending or diametral compressive force. The tests were performed at two low temperatures (−5 °C and −25 °C) and it was observed that the critical mode-I fracture toughness (KIc) was changed slightly (up to 10%) by changing the shape of the test specimen (i.e., disc and beam). This reveals that the fracture toughness is not significantly dependent on the shape of the test specimen. However, the type of applied loading has a significant influence on the determined mode I fracture toughness such that the fracture toughness determined by the disc shape specimen loaded by diametral compression (i.e., ENDC) is about 25% less than the KIc value with the same geometry but loaded with the three-point bending (i.e., ENDB) specimen. In addition, the fracture toughness values of all tested samples were increased linearly by decreasing the test temperature such that the fracture toughness ratio (KIc (@-25 °C)/KIc (@-5 °C)) was nearly constant for the ENDB, ENDC, SCB and SENB samples.

Mode I Fracture Toughness Evaluation of Adhesively Bonded Joints via J‐Integral and DIC

2020 ◽  
Vol 389 (1) ◽  
pp. 1900116
Author(s):  
Michele Perrella ◽  
Valentino Paolo Berardi ◽  
Enrico Armentani
Keyword(s):  
Fracture Toughness ◽  
Mode I ◽  
J Integral ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Toughness Evaluation ◽  
Fracture Toughness Evaluation

A novel Mode I fracture test for stitched composite laminates

2000 ◽  
Author(s):  
Leishan Chen ◽  
Peter Ifju ◽  
Bhavani Sankar
Keyword(s):  
Composite Laminates ◽  
Mode I ◽  
Fracture Test ◽  
Mode I Fracture

scholarly journals Effect of Testing Method Type and Specimen Size on Mode I Fracture Toughness of Kimachi Sandstone

2019 ◽  
Vol 135 (5) ◽  
pp. 33-41 ◽  
Author(s):  
Minami KATAOKA ◽  
Yuzo OBARA ◽  
Leona VAVRO ◽  
Kamil SOUCEK ◽  
Sang-Ho CHO ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Specimen Size ◽  
Mode I ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Testing Method

A Study on Governing Parameters to Improve the Results of Caustic Applied to Mode-I Fracture Mechanics Problems

1994 ◽  
Vol 23 (1) ◽  
pp. 1-11 ◽  
Author(s):  
P. Rathinam ◽  
R. Narayanan ◽  
G. Jayarama Rao
Keyword(s):  
Fracture Mechanics ◽  
Mode I ◽  
Mode I Fracture

scholarly journals Comparative study of elastic properties and mode I fracture energy of carbon nanotube/epoxy and carbon fibre/epoxy laminated composites

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Jyotikalpa Bora ◽  
Sushen Kirtania
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fibre ◽  
Fracture Energy ◽  
Elastic Properties ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Laminated Composite ◽  
Fe Analysis ◽  
Mode I ◽  
Mode I Fracture

Abstract A comparative study of elastic properties and mode I fracture energy has been presented between conventional carbon fibre (CF)/epoxy and advanced carbon nanotube (CNT)/epoxy laminated composite materials. The volume fraction of CNT fibres has been considered as 15%, 30%, and 60% whereas; the volume fraction of CF has been kept constant at 60%. Three stacking sequences of the laminates viz.[0/0/0/0], [0/90/0/90] and [0/30/–30/90] have been considered in the present analysis. Periodic microstructure model has been used to calculate the elastic properties of the laminated composites. It has been observed analytically that the addition of only 15% CNT in epoxy will give almost the same value of longitudinal Young’s modulus as compared to the addition of 60% CF in epoxy. Finite element (FE) analysis of double cantilever beam specimens made from laminated composite has also been performed. It has been observed from FE analysis that the addition of 15% CNT in epoxy will also give almost the same value of mode I fracture energy as compared to the addition of 60% CF in epoxy. The value of mode I fracture energy for [0/0/0/0] laminated composite is two times higher than the other two types of laminated composites.

scholarly journals Analytical corrections for double-cantilever beam tests

2021 ◽  
Author(s):  
T. Chen ◽  
C. M. Harvey ◽  
S. Wang ◽  
V. V. Silberschmidt
Keyword(s):  
Elastic Foundation ◽  
Analytical Solutions ◽  
Data Reduction ◽  
Crack Tip ◽  
Beam Theory ◽  
Dynamic Loads ◽  
Structural Vibration ◽  
Mode I ◽  
Mode I Fracture ◽  
Reduction Methods

AbstractDouble-cantilever beams (DCBs) are widely used to study mode-I fracture behavior and to measure mode-I fracture toughness under quasi-static loads. Recently, the authors have developed analytical solutions for DCBs under dynamic loads with consideration of structural vibration and wave propagation. There are two methods of beam-theory-based data reduction to determine the energy release rate: (i) using an effective built-in boundary condition at the crack tip, and (ii) employing an elastic foundation to model the uncracked interface of the DCB. In this letter, analytical corrections for a crack-tip rotation of DCBs under quasi-static and dynamic loads are presented, afforded by combining both these data-reduction methods and the authors’ recent analytical solutions for each. Convenient and easy-to-use analytical corrections for DCB tests are obtained, which avoid the complexity and difficulty of the elastic foundation approach, and the need for multiple experimental measurements of DCB compliance and crack length. The corrections are, to the best of the authors’ knowledge, completely new. Verification cases based on numerical simulation are presented to demonstrate the utility of the corrections.

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