1998
DOI: 10.1007/bf02480670
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Experimental determination of KIIC of normal strength concrete

Abstract: RESUMEThe double-edge notched specimen made of normal strength concrete has been subjected to compressive loads. It is shown that a shear crack develops at the notch tip. Visual observation and evaluation of displacement measurements have proven that this specimen allows pure mode II testing. It was possible to determine fracture toughness KI~ c. Recommendations for the testing are made.

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Cited by 31 publications
(26 citation statements)
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“…Moreover, Zhu and Tang [7] performed numerical simulation of the double edge notched shear (DEN) specimen (very similar geometry to the DENC specimen) and obtained good agreement between their analysis and experimental data from Schlangen [8]. Reinhardt and Xu [9] and Xu and Reinhardt [5] report a practical testing approach to determine K IIc , and the mode II fracture energy G IIF for concrete [10] that does not suffer from two of the key concerns of the centrally slotted disc specimen, namely, (i) that the volume through which the shear crack propagates is small, and (ii) alignment of the central slot at the correct angle to give pure mode II fracture is critical.…”
Section: Introductionmentioning
confidence: 90%
“…Moreover, Zhu and Tang [7] performed numerical simulation of the double edge notched shear (DEN) specimen (very similar geometry to the DENC specimen) and obtained good agreement between their analysis and experimental data from Schlangen [8]. Reinhardt and Xu [9] and Xu and Reinhardt [5] report a practical testing approach to determine K IIc , and the mode II fracture energy G IIF for concrete [10] that does not suffer from two of the key concerns of the centrally slotted disc specimen, namely, (i) that the volume through which the shear crack propagates is small, and (ii) alignment of the central slot at the correct angle to give pure mode II fracture is critical.…”
Section: Introductionmentioning
confidence: 90%
“…To determine the compressive strength and the Young's modulus of concrete with increasing moisture content, compressive tests were performed in accordance to ASTM C39. The mode I and mode II fracture toughnesses of concrete were quantified by fracture tests which are commonly adopted in this field (Bazant and Prat, 1988;Reinhardt and Xu, 1998). The tensile strength and Young's modulus of epoxy were characterized in accordance to ASTM D638.…”
Section: Constituent Materials: Concrete and Epoxymentioning
confidence: 99%
“…Finally, an experiment suggested by REINHARDT & XU [22] was conducted, whereby regions of "pure shear stress" were expected to exist. The AE data are giving more evidence here to the scepticism regarding the existence of shear in concrete, because mode 1 components are not negligible in the data.…”
Section: Discussionmentioning
confidence: 99%
“…A double edge notched compression test (DENCT) was suggested by REINHARDT & XU [22] to study the critical failure energy K IIC of brittle or quasi-brittle materials under shear stress. The experimental setup uses a one-sided bearing of an unreinforced cubic concrete specimen.…”
Section: Compression Testmentioning
confidence: 99%