非线性弹性大变形问题的率型解法
A Rate Type Method for Large Deformation Problems of Nonllnear Elasticity
-
摘要: 本文分别采用Jaumann应力率、Truesdell应力率和Green-Naghdi应力率导出了非线性各向同性弹性体的率型本构表达形式,通过对Mooney-Rivlin材料的简单剪切大变形分析表明,三种率型的本构关系均与全量本构关系相等价。文中还给出了相应的率型变分原理,并采应Ritz法,数值求解了受单轴拉伸的矩形橡皮薄膜的大变形问题。Abstract: In this paper, we obtain the rate-tvpe constitutive expressions of the nonlinear isotropic elastieity by using the Jaumann, Truesdell and Green-Naghdi stress rate respectively,Through analysing the simple shear deformation for Mooney-Rivlin material,three kinds of rate-type constitutive equations are verified to be equivalent to the original equation.Rate-type variational prineiples are also presented, and the Ritzmethod is used to obtain the numerical solution of a reetangular rubber membrane under uniaxial stretch.
-
Key words:
- nonlinear elasticity /
- hypoelasticity /
- large deformation /
- stress rate tensor
-
[1] Truesdall, C., Hypo-elasticity, J. Rational Mech, Anal., 4(1955), 83-133. [2] Truesdell, C. and W. Noll, Hunduch der Physik, Ⅲ/3, Springer-Verlag(1965) [3] Dienes, J. K., On the analysis of rotation and stress rate in deforming bodies, Acta Mech., 32, 2(1979), 217-232 [4] 李松年、黄执中.《非线性连续统力学》,北京航空学院出版社(1987), 390-401 [5] Oden, J. T. and D. R. Bhandri. Variational principle in nonlinear viscoelasticity, Int. J. Solids Struct., 8(1972), 1017-1026. [6] Hill, R., Some basic principle in the mechanics of solids without a nature time, J. Mech.Phys. Solids, 7(1959), 209-225. [7] 张善元.率型的广义变分原理.因体力学学报.(4) (1991), 117-126 [8] Oden, J. T. and T. Sato, Finite strains and displacement of elastic membranes by the finite element method, Int. J. Solids Structures, 3(1967), 471-488. [9] Feng, W. W. and J. T. Tielking, Large plane deformations of rectangular elastic sheets, ZAMP, 27(1976),781-789. [10] Tielking, J. T. and W. W. Feng, The application of the minimum potential energy principle to nonlinear axisymmetric membrane problems, J. Appl. Mech., 41(1976),491-497. [11] Szabó, Lãszlo and Mihãly Balla, Comparison of some stress rates, Int. J. Solids Struct., 25(1989), 279-297.
点击查看大图
计量
- 文章访问数: 1647
- HTML全文浏览量: 51
- PDF下载量: 565
- 被引次数: 0