Abstract：In recent years, with the widespread application of soft materials in fields such as tactile sensing, robotic grippers, and wearable devices, the study of their friction and contact behavior has become crucial not only for optimizing material performance but also for guiding the development of high-precision industrial technologies. This study employs a self-developed visual in-situ loading device to observe the evolution of contact area morphology during friction. Digital Image Correlation (DIC) technology combined with a second-order polynomial displacement function was applied to determine strain increments. Results indicate that the presence of tangential force induces contact anisotropy during the slip friction of soft materials, primarily originating from their large-deformation mechanical properties and the heterogeneity of surface strain response. This work preliminarily explores the interface mechanical behavior regulated by strain, providing an experimental basis for the characterization and prediction of tribological properties in soft materials.
2025, Vol. 46 
