In the previous paper, the authors proposed a 1-dimensional thermo-elastic model with regard to the mechanism of particleboard (PB) warping, and indicated that the model could describe well the behavior of longitudinal warping. Furthermore, being based on the model, it was shown that the dominant factor which caused the longitudinal warping was the temperature difference between both surfaces of PB. However, from the stand point of the temperature difference, it could not say that the effectivity of the model was adequately verified experimentally in the previous paper. Therefore, through the study in this paper on the influence of the temperature difference in the wider range upon the longitudinal warping, the effectivity of the model was verified anew. Meanwhile, since a PB is used as a plane panel, it is important that the mechanism of warping should be considered as a 2-dimensional problem in the second stage of the study. In this paper, aiming at the expanding the model into the 2-dimensional problem, the plane-warping and its regarding temperature neighboring the PB were measured and studied. Consequently, it follows from the results that the PB approximately deforms symmetrically in the direction of both longitudinal and lateral, and shows clearly the shape of anticlastic.
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