| DETERMINATION OF EFFECTIVE MODULI FOR FOAM PLASTICS BASED ON THREE PHASE SPHEROIDAL MODEL |
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| 作者姓名： | Lu Zixing |
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| 作者单位： | Lu Zixing(Institute of Solid Mechanics.Beijing University of Aeronautics and Astronautics，Beijing，100083)
Huang Zhuping Wang Ren(Department of Mechanics，Peking University，Beijing，100871) |
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| 基金项目： | Supported by the National Natural Science Foundation of China，and Laboratory for Nonlinear Mechanics of Continuous Media,Institute of Mechanics,Chinese Academy of Sciences. |
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| 摘 要： | The relations of bulk modulus,shear modulus,Young's modulus and the Poisson's ra-tio with porosity of foam plastics are determined by a three phase spheroidal model commonly used inComposite Mechanics.The results are compared with those using differential scheme.It is shownthat the material properties derived from the present model normally are larger than those obtained bydifferential scheme for foam plastics with identical porosity.The differences in shear moduli andYoung's moduli obtained by the two methods are small,but they are larger for bulk moduli of incom-pressible matrix and Poisson's ratios.The Young's moduli of high density foam plastics derived by thepresent model agree better with experimental ones.
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| 收稿时间： | 19 June 1995 |
DETERMINATION OF EFFECTIVE MODULI FOR FOAM PLASTICS BASED ON THREE PHASE SPHEROIDAL MODEL |
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| Lu Zixing.DETERMINATION OF EFFECTIVE MODULI FOR FOAM PLASTICS BASED ON THREE PHASE SPHEROIDAL MODEL[J].Acta Mechanica Solida Sinica,1995,8(4):294-302. |
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| Authors: | Lu Zixing |
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| Institution: | (1) Institute of Solid Mechanics, Beijing University of Aeronautics and Astronautics, 100083 Beijing;(2) Department of Mechanics, Peking University, 100871 Beijing |
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| Abstract: | The relations of bulk modulus,shear modulus,Young's modulus and the Poisson's ra- tio with porosity of foam plastics are determined by a three phase spheroidal model commonly used in Composite Mechanics.The results are compared with those using differential scheme.It is shown that the material properties derived from the present model normally are larger than those obtained by differential scheme for foam plastics with identical porosity.The differences in shear moduli and Young's moduli obtained by the two methods are small,but they are larger for bulk moduli of incom- pressible matrix and Poisson's ratios.The Young's moduli of high density foam plastics derived by the present model agree better with experimental ones. |
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| Keywords: | effective moduli foam plastics three phase spheroidal model |
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