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Jose Viña - One of the best experts on this subject based on the ideXlab platform.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode i composite fracture failure the virtual crack closure technique versus the two Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate (G). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

J Bonhomme - One of the best experts on this subject based on the ideXlab platform.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode i composite fracture failure the virtual crack closure technique versus the two Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate (G). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

Alejandra Argüelles - One of the best experts on this subject based on the ideXlab platform.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode i composite fracture failure the virtual crack closure technique versus the two Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate (G). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

M. A. Castrillo - One of the best experts on this subject based on the ideXlab platform.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode i composite fracture failure the virtual crack closure technique versus the two Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate (G). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

  • Computational models for mode I composite fracture failure: the virtual crack closure technique versus the two-Step extension method
    Meccanica, 2010
    Co-Authors: J Bonhomme, M. A. Castrillo, Alejandra Argüelles, Jose Viña
    Abstract:

    This paper deals with the numerical determination of the energy release rate under mode I in carbon fibre reinforced composites (CFRC). Two different models are reviewed: the virtual crack closure technique (VCCT) and the Two-Step extension method. The Two-Step extension method needs two Computational Steps in order to calculate the energy release rate ( G ). The VCCT method is able to provide ERR value only from one Computational Step. Results were compared with empirical data obtained from double cantilever beam (DCB) tests carried out on unidirectional AS4/8552 carbon/epoxy laminates. This study showed that, in a pure mode I state, results obtained via the Two-Step extension method were in agreement with a straightforward calculation of the elastic energy variation in the system. As expected, results obtained from VCCT and Two-Step extension models converge as element length decreases. Regarding the comparison between experimental and numerical results, the study showed that a correction for testing devices compliance was needed to match both models.

Anton Zeilinger - One of the best experts on this subject based on the ideXlab platform.

  • high speed linear optics quantum computing using active feed forward
    Nature, 2007
    Co-Authors: Robert Prevedel, Philip Walther, F Tiefenbacher, Pascal Bohi, Rainer Kaltenbaek, Thomas Jennewein, Anton Zeilinger
    Abstract:

    Until now experimental proof-of-principle demonstrations of optical quantum computers have been probabilistic: that is, the computation succeeds in only a small fraction of runs. Exploiting a computer architecture called one-way quantum computation, Prevedel et al. have now succeeded in undoing emergent errors by 'feed-forwarding' those events and applying error correction in real time. In effect the quantum computer is forced to produce the right result when the 'compute' button is pressed. This experimental demonstration of one-way quantum computation could be a key result for the future development of these systems. One-way quantum computation is based on 'cluster states' (that is, highly entangled multiparticle states). This paper experimentally implements active feed-forward technique in such a system, a crucial element in the approach to correct for random quantum measurement errors. As information carriers in quantum computing1, photonic qubits have the advantage of undergoing negligible decoherence. However, the absence of any significant photon–photon interaction is problematic for the realization of non-trivial two-qubit gates. One solution is to introduce an effective nonlinearity by measurements resulting in probabilistic gate operations2,3. In one-way quantum computation4,5,6,7,8, the random quantum measurement error can be overcome by applying a feed-forward technique, such that the future measurement basis depends on earlier measurement results. This technique is crucial for achieving deterministic quantum computation once a cluster state (the highly entangled multiparticle state on which one-way quantum computation is based) is prepared. Here we realize a concatenated scheme of measurement and active feed-forward in a one-way quantum computing experiment. We demonstrate that, for a perfect cluster state and no photon loss, our quantum computation scheme would operate with good fidelity and that our feed-forward components function with very high speed and low error for detected photons. With present technology, the individual Computational Step (in our case the individual feed-forward cycle) can be operated in less than 150 ns using electro-optical modulators. This is an important result for the future development of one-way quantum computers, whose large-scale implementation will depend on advances in the production and detection of the required highly entangled cluster states.