| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
In order to test the hypothesis about reduction in the deformation of the freeze ligamentum flavum (LF), tensile test in a freezing room and nonlinear finite element (FE) analysis were employed. Tensile test of the porcine LF was conducted both in a freezing room at -40 degrees Celsius and a laboratory at room temperature. Stress-strain diagram was obtained. To apply nonlinear FE analysis for the porcine LF, the 1st order Ogden coefficient of the porcine LF was identified from the stress-strain diagram from the tensile test. Assuming that the sharp bar pierced the LF when the Mises stress reached a constant value, the required deformation became shorter by 73% by freezing the LF.
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