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The Experimental Study of Tracheal Cartilage Stress Relaxation

SUN Changjiang1,FENG Tiejian2,LU¨ Yaping3,MA Hongshun4(1.China-Japan Friendship Hospital,Jilin University,Changchun 130031,China;2.Nanling Campus Hospital of Jilin University,Changchun 130022;3.Daqing Petroleum Institute Mechanical Science and Engineering College,Province Daqing 163308,China;4.Project Strength Departments of Nanling School,Jilin University Changchun 130022)  
To research the tracheal cartilage stress relaxation characteristic and provide the tracheal cartilage stress relaxation characteristic parameter for the clinical.10 cartilages were taken on the electronic universal testing machine to carry on the stress relaxation experiment.The increasing speed of the stress relaxation experiment strain was 50%/min.Experimental temperature was(36.5±0.65)℃,the experimental time was set at 7 200 s.Then 100 empirical data were gathered and processed by the method of Unary Linear Regression Analysis.The tracheal cartilage 7 200 s stress relaxation quantity was 0.316 MPa,the 7 200 s stress relaxation curve achieved the balance basically.The tracheal cartilage stress relaxation curve is changed by the logarithm relations,the tracheal cartilage is the non-linear viscoelastic material.
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