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[高分] Fracture process zone for concrete for dynamic loading
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DU, J (DU, J) ; YON, JH (YON, JH) ; HAWKINS, NM (HAWKINS, NM) ; ARAKAWA, K (ARAKAWA, K) ; KOBAYASHI, AS (KOBAYASHI, AS) MAY-JUN 1992 ACI MATERIALS JOURNAL A hybrid experimental-numerical procedure was used to determine the fracture process zone (FPZ) associated with a rapidly propagating crack in single-edged notch (SEN), three-point bend, concrete specimens which were impact-loaded by a drop weight. The recorded impact load history was used to drive a dynamic finite element code in its propagation mode with assumed FPZ and dynamic elastic properties until a match was obtained between the computed and measured strains. In addition, the computed crack opening displacements (COD) matched with those obtained by moire interferometry, thus validating the in verse analysis for determining the FPZ and dynamic elastic properties of a fracturing concrete specimen. |
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(2025-6-4)
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