?背部皮?生物力?特性的??研究

Objective To investigate and evaluate the biomechanical property of the skin in pig's back in order to provide the essential theoretical basis for clinical and skin products. Method Taking the skin in pig's back as experimental material, the monotonic tensile and cyclic tension-tension tests with different loading rates was researched respectively. Meanwhile, with different loading directions and stress levels the creep and cyclic tension-tension tests were also been studied experimentally. Result The capacity of resisting tensile, creep and cyclic deformation of pig's skin in the direction along the Langer's line is stronger than that perpendicular to the Langer's line. The creep curve of pig's skin is load-dependent and consisted of three phases about deceleration phase, stabilization phase and destruction stage. Pig's skin exhibits apparent ratcheting under asymmetry stress cycle. Ratcheting deformation displays significant mean stress, stress amplitude and loading speed dependence. Conclusion Based on the experiment, the biomechanics property of skin's viscoelasticity and anisotropic feature have been sysmatic stadied, it's provide necessary theoretical fundation for clinical and leather products.