A theoretical–experimental holographic method for assessing dehydration effects on plant tissue elasticity via vibration analysis

This study presents a theoretical–experimental approach for assessing the effects of dehydration on the elastic properties of plant tissues. The proposed method integrates plate and shell theory with time-average digital holography, a non-destructive optical technique that enables high-resolution analysis of the vibrational behavior of materials. As a representative application, this approach was used to investigate the mechanical changes induced by dehydration in Capsicum annuum L. peppers, whose tissue, once dried, exhibits geometry and vibrational behaviors comparable to that of a rigid thin plate. The results revealed that the dehydrated samples exhibited a shift in their vibrational response, which was related not only to the reduction in moisture content but also to structural damage and changes in elastic properties. Moreover, a high degree of agreement was observed between the theoretical model and the experimental data, validating the method as a valuable tool for monitoring and optimizing processes in order to minimize structural degradation and maintain product quality. These findings provide valuable insights for optimizing drying conditions and preserving product quality in the food and agricultural industries. • A high degree of agreement model for assessing dehydration effects was developed. • Dehydration shifts the resonance frequency and reduces the vibration amplitude. • Dehydration of chili peppers alters their elastic properties. • The elastic properties of chili peppers degrade as drying time increases. • Changes in chili pepper elasticity may be linked to structural damage.