A THEORY OF THE BLAHA EFFECT

All the theories of the Blaha effect presented up to now have overlooked the significance of the internal stress, and they cannot explain the experimental results completely well. A new theory, where the internal stress is properly taken into account, is formulated. The theory gives a larger reduction of the static applied stress than other theories, when the applied stress is just above the level of the internal stress, or the effective stress is small, and it can explain the experimental observations more satisfactorily.