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The paper studies the behaviour of breather solutions of the sine-Gordon (Enneper) equation under the action of a constant external force s. As a first step the modification of the breather solution by the external force is calculated in the so called adiabatic approximation. In a second step the coupling of the breather motion to the “heavy phonons” of the system is obtained by a perturbation treatment...
Four different microstructures of an engineering multi-phase Ti–43.5Al–4Nb–1Mo–0.1B alloy (in at.%) were fracture mechanically tested under monotonic loading conditions from room temperature up to 700 °C. Monotonic loading crack resistance curves were measured using the potential drop technique and the calculated crack lengths were compared to optically measured crack lengths during in-situ experiments...
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