登录

Chapter 18

Stress and Strain - Axial Loading

轴向载荷下的法向应变
轴向载荷下的法向应变
A rod subjected to a load undergoes elongation. A load-deformation diagram can represent the elongation but cannot predict deformation in different rods. ...
应力-应变图
应力-应变图
Consider a cylindrical specimen placed in a system to measure its tensile strength. Two gauge marks are inscribed on the central portion of the specimen. ...
应力-应变图 - 延展性材料
应力-应变图 - 延展性材料
When a specimen is subjected to loading the length first increases linearly at a slow rate, resulting in an initial straight line with a steep slope on ...
应力-应变图 - 脆性材料
应力-应变图 - 脆性材料
Brittle materials, under tensile stress, do not elongate much before rupturing, meaning their ultimate and breaking strengths are identical. Compared with ...
真实应力和真实应变
真实应力和真实应变
Engineering stress is the ratio of the load and the undeformed original cross-sectional area. Engineering stress approximates strain which represents the ...
胡克定律
胡克定律
Hooke's law states that stress applied to a material is directly proportional to the strain it experiences within the elastic limit. For ductile ...
塑性行为
塑性行为
Materials under stress due to tensile loading exhibit elastic and linear behavior until the yield point. Removing the load at the yield point, stress and ...
疲劳
疲劳
Fatigue occurs when the materials, under repeated loads for thousands or millions of cycles, rupture at a stress level much lower than the material's ...
杆件在多重载荷下的变形
杆件在多重载荷下的变形
The deformation of a rod with different materials and cross-sections is computed by dividing it into parts, each characterized by individual parameters. ...
静态不确定问题解决
静态不确定问题解决
Consider two cylindrical rods, one of steel and another of brass, joined at point B and restrained by rigid supports at points A and C. Determine the ...
热应变
热应变
A homogeneous rod with a uniform cross-section, resting freely on a horizontal surface, expands when heated. The expansion is proportional to the ...
温度相关变形
温度相关变形
Consider a non-homogenous rod made of steel and brass, restrained at both ends and subjected to a temperature change. The stress and load on the rod are ...
泊松比
泊松比
When a slender bar is subjected to an axial load, the bar material undergoes axial strain, causing it to deform in the axial direction. Simultaneously, ...
广义胡克定律
广义胡克定律
The generalized Hooke's Law extends Hooke's Law to all stress types and directions, aiding in understanding materials under multiaxial stress ...
Bulk Modulus
Bulk Modulus
The bulk modulus measures a material's resistance to uniform compression. It is defined as the proportionality constant between a change in pressure ...
剪切应变
剪切应变
In a cubic element with a general state of stress, the shearing stresses can deform a cube into an oblique parallelepiped without affecting normal ...
泊松比、弹性模量和刚度模量之间的关系
泊松比、弹性模量和刚度模量之间的关系
A slender bar subjected to an axial load undergoes deformation in the axial and transverse directions. The deformation affects the cubic elements within ...
圣维南原则
圣维南原则
Consider a member with plates on both ends. When loads are applied centrally on the plates, they move towards each other without rotating, causing the ...
应力集中
应力集中
Stress concentration refers to the amplification of stress in a structural member near points of discontinuity, such as holes or abrupt changes in ...
残余应力
残余应力
When a rod is stretched beyond its yield point, it permanently deforms and doesn't regain its original length. The stresses created during loading are ...
JoVE Logo

政策

使用条款

隐私

科研

教育

关于 JoVE

版权所属 © 2025 MyJoVE 公司版权所有,本公司不涉及任何医疗业务和医疗服务。