The knee is a complex moving part in our bodies. Its goal is to provide lubrication for the constant back-and-forth movement of walking and running, while supporting the enormous load within a tiny gap between the femur and the tibia bones. Within this gap, the viscoelastic synovial fluid lubricates the cartilage surfaces and provides low friction coefficients in healthy knees. Artificial implants have issues generating the same type of lubricious surfaces while maintaining long-term wearability. Our goal is to understand the physics of lubrication between these narrow gaps so as to engineer new materials that can provide long-lasting superlubricity and ultra-low friction coefficients.
Personnel: Yunhu Peng