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An analytical and numerical pseudo-elastic formulation formechanosorptive behaviour of wood is investigated in this work in order to predict thecrack appear in wood material. The relationship between the stress and the strain isintroduced by the Hooke’s law during the humidufication phases, and by the restrictedHooke's law during the drying process. In numerical examplaries, the sinusoidal stressand humidity loadings, the rigidity and the compliance analytic formulations areimplemented in Matlab© software. Also, the mechanosorptive behaviour under asinusoidal loading is proposed. The result shows the ability of the model to depict themechanosorptive behaviour of wood material under variable loading and humidity.Simultaneously, a numerical pseudo elastic calculation is applied in order to modelledthe crack initiation during natural drying process of a green wood slice.