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- W604508993 abstract "A four point bending test setup was developed for investigating stable crack growth on notched asphaltic concrete beams using a periodic force signal. The purpose of the investigations was to assess the resistance to crack growth. Crack growth was measured with crack foils, and it was also calculated from the ripple amplitude of the measured compliance. The crack opening displacement was also measured. Test beams of dense asphaltic concrete sized 60 x 60 x 450 cubic mm were used. The experiments were carried out at a temperature of 0 degrees Celsius and a load frequency of 30 Hz. The flexural tensile strength was (7 +/- 1) MPa, the stiffness modulus was 19 GPa, and the phase angle was 7 degrees. Notches of 5 mm deep or more acted as starter cracks. Stable crack growth was observed up to the last 10 to 20 mm of the beam. The conditions for plane strain were fulfilled and plastic deformation at the crack tip was not dominant. Paris constants of 10(super -6) to 10(super -5) for the material parameter A and 1.5 for the material parameter n were found. From the periodic tests the stress intensity factor K(sub 1c) was estimated to be 35 MPa mm(super 1/2). For the covering abstract of the conference see IRRD 867688." @default.
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- W604508993 date "1994-03-01" @default.
- W604508993 modified "2023-09-27" @default.
- W604508993 title "CRACK GROWTH EXPERIMENTS ON ASPHALTIC CONCRETE BEAMS" @default.
- W604508993 hasPublicationYear "1994" @default.
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