Analyzing of Wedge Splitting Test on Asphalt Pavement Using Optical Measurements

Abstract

This paper dealt with the characterization of opening mode fracture using Digital Image Correlation, coupled with a kinematic approach. Tests were carried out using a Wedge Splitting sample made in asphalt concrete AC12. The asphalt concrete was provided in the RILEM-SIB. The samples were a bi-layered asphalt concrete with or without a carbon fiber grid at interface. During experimentation, the sample deformation was recorded by using Digital Image Correlation. Based on the optical measurements coupled with the analytical approach, the energy release rate was performed by means the crack relative displacement and stress intensity factors. Using an adjustment procedure, based on an iterative Newton–Raphson algorithm, the crack relative displacement factor was calculated from optical measurements. the stress intensity factor was estimated from an analytical approach. Furthermore, the crack opening displacement was measured from the mark tracking method. This approach allowed the assessment of fracture parameters for the real structures to be considered.

Contribution of Interface Fracture Mechanism on Fracture Propagation Trajectory of Heterogeneous Asphalt Composites

“…Afterwards, some experimental testing methods and test samples including the edge cracked rectangular beam specimen subjected to four-point bend loading and the semi-circular bend (SCB) specimen were employed by Molennar et al [11,12] for investigating the mode I fracture of the asphalt mixtures. Other test configurations such as the modified indirect tensile disc (MITD) specimen [13], disc-shape compact-tension specimen [14], single edge notch beam (SENB) subjected to three-point bend [9,15], wedge splitting disc (WSD) [16], edge notch disc bend (ENDB) [17][18][19][20][21][22][23][24], edge notch disc diametral compression (ENDC) [25][26][27], center cracked Brazilian disc subjected to diametral compression [28], semi-circular bend (SCB) specimen [29][30][31][32][33][34], and hollow disc (or ring shape) specimen containing center crack and loaded diametrically [35] are some of the test configurations employed in the literature for investigating the fracture resistance of asphalt mixtures. Any of these test samples are suitable for simulating and conducting specific modes of fracture.…”

KIcandKIIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

“…Some test specimens usually in the shape of circular discs including diametral compact-tension (DCT) specimen, [1][2][3][4] centre cracked Brazilian disc specimen, 5 semicircular bend (SCB) specimen, [6][7][8][9][10][11][12][13][14][15][16][17][18][19] edge notch disc bend (ENDB) specimen [20][21][22][23][24][25][26] and edge notch disc diametral compression (ENDC) specimen 27,28 are usually used for conducting the fracture toughness experiments on asphalt mixtures. In addition, beam shape specimens such as rectangular beam specimen containing an edge crack and subjected to three-point bending (TPB) or four-point bending (FPB) [29][30][31][32][33][34][35] or wedge-splitting cube (WSC) 36,37 samples are among the other miscellaneous fracture test specimens employed by the asphalt and bituminous researchers. The above-mentioned test methods were mostly used earlier for performing the pure mode I fracture toughness (K Ic ) experiments on asphalt concrete materials.…”

Mechanical and fracture properties of particleboard

“…As detailed in works of [19,20,25,52], the CRDF is calculated from the experimental displacement field via an adjustment procedure based on an iterative Newton-Raphson algorithm (see Fig. 7).…”

“…It is also interesting to observe that the relationship between the CRDF corresponding to mode I and II, and the relationship to the SIF show some similarities. Pop et al [19,20] and Meite et al [25,52] show also that the energy may be estimated from the CRDF and SIF values, Eq.…”