These metals are phosphor bronze, beryllium bronze, manganese steel and stainless steel.
Question 2: What's the difference between elastic materials and plastic materials? Elasticity refers to the deformation of the material after being stressed, and it will return to the stress-free state after being unloaded by external force. This deformation is called elastic deformation.
Plasticity refers to the irreversible deformation of materials after being stressed, which is called plastic deformation.
Therefore, the elastic material will not deform after unloading after being stressed, and the plastic material will produce irreversible plastic deformation after being subjected to the elastic limit.
Question 3: Which hard and elastic materials are hard and elastic? Spring steel is the first type.
Question 4: What nonmetallic elastic material has rubber?
These metals are phosphor bronze, beryllium bronze, manganese steel and stainless steel.
Question 5: What are the materials of elastic steel plate? 65Mn, 60Si2Mn, 55Si2Mn, 50CrVA, 30W4Cr2VA, etc.
Question 6: What is linear elastic material? A branch of elasticity, also known as nonlinear elasticity theory, is a generalization of classical linear elasticity theory. There are two kinds of nonlinearity in nonlinear elasticity: ① physical nonlinearity, that is, the nonlinearity of stress-strain relationship (see stress-strain relationship). The stress-strain relationship of rubber, polymer and biological soft tissue is nonlinear. ② Geometric nonlinearity, that is, the nonlinearity of the relationship between strain and deformation gradient. Geometric nonlinearity exists in the large deformation and stability problems of thin plates, thin shells, thin rods and thin-walled members. The above two nonlinearities are not related to each other, so nonlinear elastic problems can be divided into three categories: physical linear and geometric nonlinear problems; Physical nonlinearity and geometric linearity; Physical nonlinearity and geometric nonlinearity. Answer supplement
The equations of finite deformation theory are long, complex and strongly nonlinear, so people at that time felt that there was little hope for a general discussion in mathematics. Therefore, the research work in this field has not made much progress for a long time. 1940, M. Mooney put forward the expression of elastic potential function of some types of rubber through a lot of experiments, and put forward the form of elastic potential function, one of the difficult problems in nonlinear elasticity theory, which proved that rubber is an almost incompressible material. 1948 R.S. rivlin obtained exact solutions to several simple and important problems of incompressible elastic body under any form of energy storage function. When they are applied to rubber products, even if the elongation of rubber is two or three times of the original length, the accuracy can still reach several percent. Encouraged by this achievement, scholars began to discuss the theory of finite deformation elasticity again, which led to the vigorous development of the whole rational mechanics. Since then, nonlinear elasticity theory has become an important part of rational mechanics. Since 1952, C. Truesdell, W. Noel, B. D. Cooreman, J. L. Eriksson, M. E. Gettin, A. C. Ellingen and Chinese American Wang Zhaocheng have made great contributions to nonlinear elasticity, and Guo Zhongheng of China is in1966. From 65438 to 0972, Auden and others did a lot of fruitful work in numerical solution of finite element method, which made nonlinear elastic force field widely used in engineering practice. Answer supplement
When discussing nonlinear elasticity in deformation description, the area occupied by an object at the initial time t0 in three-dimensional space is taken as the reference configuration (see configuration), on which Cartesian coordinates OX 1X2X3 are taken. At time t, the area occupied by the object is the current configuration, on which Cartesian coordinates 0x 1x2x 3 are taken.
In addition:
By the equation xk = χ k (xk, t) (k, k = 1, 2, 3),
(1) describes something called exercise. If only the fixed torque is considered, there is so-called "deformation", that is, xk = χ k (xk).
(2) For the case of single-valued inverse transformation, xk = к k (xk, t) exists.
(3) The position vector of the material point at time t0 is X, and during the movement, the position vector of the point at time t is X, then X = X+U,
(4) where u is the displacement vector of the material point, and its coordinates in OX 1X2X3 and Ox 1x2x3 are denoted as uk and uK respectively. It is necessary to distinguish the coordinates of OX 1X2X3 and Ox 1x2x3, which is one of the basic characteristics to distinguish nonlinear elasticity from linear elasticity. The quantity describing the deformation of an object has a deformation gradient, which is defined in OX 1X2X3 as,
(5)
Question 7: What are the elastic materials? (metallic color; Nonmetallic rubber.
These metals are phosphor bronze, beryllium bronze, manganese steel and stainless steel.
Question 8: What is superelastic material? They refer to materials whose strain caused by external force far exceeds the elastic limit strain, and the strain can be restored to the original state when unloading.
Commonly used materials are rubber, sponge, foam and so on. ...
Question 9: What are the materials of elastic steel plate? 65Mn, 60Si2Mn, 55Si2Mn, 50CrVA, 30W4Cr2VA, etc.
Question 10: Which nonmetallic elastic materials have rubber?
These metals are phosphor bronze, beryllium bronze, manganese steel and stainless steel.