2021 Theory of Elasticity(Southeast University) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-03-01到2021-07-04

1. Introduction to elasticity Quiz for Chapter 1

小提示:本节包含奇怪的同名章节内容

1、 问题:In the history of elasticity theory, who first investigated the contact mechanics between deformable elastic bodies?
选项：
A:Hertz
B:Navier
C:Cauchy
D:Saint-Venant
答案: 【Hertz】

2、 问题:How many elastic constants do the most anisotropic elastic solids have?
选项：
A:1
B:2
C:15
D:21
E:36
答案: 【21】

3、 问题:The fundamental assumptions of elasticity theory include:
选项：
A:Continuity
B:Homogeneity
C:Isotropy
D:Small Deformation
E:Elasticity
答案: 【Continuity;
Homogeneity;
Isotropy;
Small Deformation;
Elasticity】

4、 问题:Has elasticity theory found its applications in which of the following engineering areas?
选项：
A:Civil engineering
B:Mechanical engineering
C:Aeronautical and aerospace engineering
D:Materials science and engineering
答案: 【Civil engineering;
Mechanical engineering;
Aeronautical and aerospace engineering;
Materials science and engineering】

5、 问题:In the history of elasticity theory, Poisson first derived the deflection equation of thin plates.
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:Elasticity theory imposes no limits on the geometric shape of elastic solids.
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:How many elastic constants do the equations of equilibrium proposed by Navier have? 
答案: 【1】

8、 问题:Elasticity analysis is primarily concerned with the determination of displacement, strain and (   ) distributions in elastic solids.
答案: 【(以下答案任选其一都对)stress;
stresses;
Stress;
Stresses;
STRESS;
STRESSES】

9、 问题:How many elastic constants do the equations of equilibrium proposed by Navier have? (integer only)
答案: 【1】

2. Mathematical preliminaries Quiz for Chapter 2

小提示:本节包含奇怪的同名章节内容

1、 问题:In cylindrical coordinates, the radial and angular unit vectors are dependent on which of the following coordinate variable?
选项：
A:Radial coordinate (r)
B:Angular coordinate (θ)
C:Vertical coordinate (z)
D:None
答案: 【Angular coordinate (θ)】

2、 问题:In indicial notation, no index can appear more than ( ) times in a single algebraic term.
选项：
A:1
B:2
C:3
D:no limit
答案: 【2】

3、 问题:In spherical coordinates, unit vectors are functions of which of the following coordinate variables?
选项：
A:Spherical radial (R)
B:Spherical longitudinal coordinate (φ)
C:Spherical latitudinal coordinate (θ)
D:All
答案: 【Spherical longitudinal coordinate (φ);
Spherical latitudinal coordinate (θ)】

4、 问题:Which of the following are isotropic tensors, so that their components do not change under coordinate transformations?
选项：
A:Any scalar
B:Any vector
C:Kronecker delta
D:Levi-Civita symbol
答案: 【Any scalar;
Kronecker delta;
Levi-Civita symbol】

5、 问题:Force can be represented by a scalar.
选项：
A:正确
B:错误
答案: 【错误】

6、 问题:The operation of Laplacian differential operator on a tensor does not change its order.
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:How much is the determinant of the transformation matrix between different coordinate systems?
答案: 【(以下答案任选其一都对)1;
-1】

8、 问题:The left divergence of a second order tensor can be obtained by the contraction operation between the first and the (   ) index of its right gradient.
答案: 【(以下答案任选其一都对)third;
3rd;
3;
Third;
THIRD】

9、 问题:How much is the determinant of the transformation matrix between different coordinate systems? (integer only)
答案: 【(以下答案任选其一都对)1;
-1】

3. Displacement and strain Quiz for Chapter 3

小提示:本节包含奇怪的同名章节内容

1、 问题:How many invariants does the strain tensor have?‍
选项：
A:Zero
B:One
C:Two
D:Three
答案: 【Three】

2、 问题:The principal values of the total strain tensor and the deviatoric strain tensor differ by the amount of (    ).
选项：
A:Mean
stress
B:1/3 of the mean stress
C:Zero
D:Three times of the mean stress
答案: 【Mean
stress】

3、 问题:How many independent compatibility equations does a two-dimensional elastic problem have?
选项：
A:Zero
B:One
C:Three
D:Six
答案: 【One】

4、 问题:Which of the following factors contribute to the displacements of a material point? ‍
选项：
A:Rigid-body translations
B:Rigid-body rotations
C:Strain deformations
D:None
答案: 【Rigid-body translations;
Rigid-body rotations;
Strain deformations】

5、 问题:The total strain tensor and the deviatoric strain tensor have the same principal directions.
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:The mean strain tensor is an isotropic tensor so that its components remain invariant under coordinate transformation.
选项：
A:正确
B:错误
答案: 【正确】