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Airy stress functions in the form of third-order polynomials of Cartesian coordinates will general ( ) distribution of stresses.
选项：

A:linear;
B:constant;
C:quadratic;
D:quartic

发布时间：2024-04-03 11:22:13

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1.Airy stress functions in the form of first-order polynomials of Cartesian coordinates produce zero stresses.选项： A:正确; B:错误
2.The defining equation in Airy's stress function is an invariant form.选项： A:正确; B:错误
3.About plane strain and plane stress formulations, which of the following statements are correct descriptions?选项： A:One formulation can be converted to another by the simultaneous replacements of Young’s modulus and Poisson’s ratio.; B:With the help of Kolosov’s constant, they be expressed with the identical form.; C:The governing equations of two formulations differ only by elastic constants.; D:The method of Airy stress function is valid for both formulations.
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7.The problem now arises as to whether or not functions in general may be represented in this form.
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13.For a simply-connected plane domain subjected to harmonic body force potentials and only traction boundary conditions, which of the following statements are correct?选项： A:The Airy stress functions of plane strain and plain stress formulations satisfy the same governing equation.; B:The stresses for plane strain and plane stress formulations are identical.; C:The stresses for plane strain and plane stress formulations are independent on elastic constants.; D:The displacements for plane strain and plane stress formulations are identical.
14.In the following cases for quadratic convex function, which ones are correct? （）选项： A:The stationary point of quadratic strictly convex function is unique. B:The Hessian matrix of quadratic convex function is a constant positive semi-definite matrix. C:The sum of two quadratic convex function is convex. D:A quadratic convex function is strictly convex if and only if its Hessian matrix is positive definite.
15.Which of the following equations are included in Airy's stress function method? 选项：
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18.Which of the following equations can be treated as the defining equations of the Airy's stress function? 选项：
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Airy stress functions in the form of third-order polynomials of Cartesian coordinates will general ( ) distribution of stresses.选项： A:linear; B:constant; C:quadratic; D:quartic

Airy stress functions in the form of third-order polynomials of Cartesian coordinates will general ( ) distribution of stresses.
选项：

A:linear;
B:constant;
C:quadratic;
D:quartic