Abstract The swelling and drying behavior of a gelatin-glycerol-water hydrogel are examined experimentally for different compositions and different environmental conditions. Significant asymmetry in the swelling and drying kinetics is observed from these measurements. The early time measurements are interpreted first within the context of a linear poroelastic theory, but a fully nonlinear Flory-Rehner theory is required in order to capture the long time behavior. Comparison of the experimental measurements with simulations based on both the linear and nonlinear constitutive models yields a consistent calibration of the material parameters of the models.

中文翻译：

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明胶基水凝胶溶胀和干燥行为的线性和非线性多孔弹性分析

摘要 通过实验研究了明胶-甘油-水凝胶在不同成分和不同环境条件下的溶胀和干燥行为。从这些测量中观察到溶胀和干燥动力学的显着不对称。首先在线性多孔弹性理论的背景下解释早期测量值，但需要完全非线性的 Flory-Rehner 理论来捕捉长时间的行为。实验测量与基于线性和非线性本构模型的模拟的比较产生模型材料参数的一致校准。