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H. Awaji

Bio: H. Awaji is an academic researcher. The author has contributed to research in topics: Fracture (geology). The author has an hindex of 1, co-authored 1 publications receiving 15 citations.

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Journal ArticleDOI
Ralf G. Cuntze1
TL;DR: In this paper, the failure conditions for a unidirectional lamina are derived based on the Failure Mode Concept (FMC) which takes into account the material-symmetries (by the application of invariants) of the UD-lamina homogenized to a material, and on a strict failure mode thinking.

238 citations

Journal ArticleDOI
TL;DR: In this article, a ring-on-ring flexural test setup was developed to apply equi-biaxial tensile stress to large disc specimens of graphite along with the conventional four-point-bend test.

36 citations

Journal ArticleDOI
R Cuntze1
TL;DR: The failure mode concept model was used in the second world-wide failure exercise as discussed by the authors, which dealt with the behaviour of isotropic material and unidirectional as well as multidirectal unIDirectional laminae-composed laminates subjected to three dimensional (triaxial) states of stress.
Abstract: This paper represents the author’s contribution to the second world-wide failure exercise using his failure mode concept modelling capability. The second world-wide failure exercise deals with the behaviour of isotropic material and unidirectional as well as multidirectional unidirectional laminae-composed laminates subjected to three-dimensional (triaxial) states of stress. Twelve challenging test cases were provided by the organisers and those covered stress–strain curves and failure envelopes under three-dimensional stress states. The application of the new failure mode concept model has extended the three-dimensional modelling by taking into account the effects of hydrostatic pressure and second glass temperature shift factor on the stress–strain curves and failure envelopes. The failure mode concept model was capable of successfully solving the majority of all the problems and a comparison between the predictions and test data is planned to be published in Part B of the second world-wide failure exer...

34 citations

Journal ArticleDOI
TL;DR: In this paper, an infrared radiation (IR) heating method was used to evaluate thermal shock parameters (thermal shock strength and thermal shock fracture toughness) of float glass and alumina.
Abstract: An infrared radiation(IR) heating method was used to evaluate thermal shock parameters(thermal shock strength and thermal shock fracture toughness)of float glass and alumina. This technique makes it possible to evaluate the parameters directly from the electric power of the IR heater. In this paper we discuss how the pertinent thermal shock parameters should be estimated both as physical properties of a material and as a function of temperature. The stress intensity factors for a disk with an edge crack were analyzed numerically under a thermal shock loading. The thermal shock parameters in both ambient and elevated-temperature environments were measured by the IR heating technique and the results were compared with predicted values, which combined such emperature-dependent properties of the material as Young's modulus, thermal conductivity, linear thermal expansion, and tensile strength or fracture toughness.

22 citations