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单词 Thermal stress
释义

Thermal stress

原声例句
奇趣工程百科

It has also very low thermal expansion, so expansion and contraction are minimized, reducing the thermal stress in the aircraft.

它还具有非常低的热膨胀,因此膨胀和收缩最小化,从而减少了飞机中的热应力。

IELTS Reading

'Discovering the molecules that allow plants to sense temperature has the potential to accelerate the breeding of crops resilient to thermal stress and climate change.'

“发现让植物感知温度的分子有可能加速对热应激和气候变化有抵抗力的作物的培育。”

2023-38

" If the outside heats faster than the middle, you get thermal stress--like when you drop an ice cube in water and you hear it crack, " says study author Erik Finger, a transplant surgeon at the University of Minnesota.

研究作者、明尼苏达大学移植外科医生埃里克·芬格 (Erik Finger) 表示:“如果外部升温速度快于中间,就会产生热应力,就像将冰块放入水中时听到冰块破裂的声音一样。”

中文百科

应力 Stress (mechanics)

(重定向自Thermal stress)
图1,在一个可变形连续物质内部的各种可能应力

在连续介质力学里,应力定义为单位面积所承受的作用力。以公式标记为

其中,\sigma \,表示应力;\Delta F_j\,表示在j\,方向的施力;\Delta A_i \,表示在i\,方向的受力面积。

假设受力面积与施力方向正交,则称此应力分量为正向应力,如图1所示的\sigma_{11}\,\sigma_{22}\,\sigma_{33}\,,都是正向应力;假设受力面积与施力方向互相平行,则称此应力分量为剪应力(shear stress),如图1所示的\sigma_{12}\,\sigma_{13}\,\sigma_{21}\,\sigma_{23}\,\sigma_{31}\,\sigma_{32}\,,都是剪应力。

「内应力」指组成单一构造的不同材质之间,因材质差异而导致变形方式的不同,继而产生的各种应力。

采用国际单位制,应力的单位是帕斯卡(Pa),等于1牛顿/平方公尺。应力的单位与压强的单位相同。两种物理量都是单位面积的作用力的度量。通常,在工程学里,使用的单位是megapascals(MPa)或gigapascals(GPa)。采用英制单位,应力的单位是磅力/平方英寸(psi)或千磅力/平方英寸(ksi)。

英语百科

Stress (mechanics) 应力

(重定向自Thermal stress)
Built-in strain, inside the plastic protractor, developed by the stress of the shape of the protractor, is revealed by the effect of polarized light.
Inca bridge on the Apurimac River
The stress across a surface element (yellow disk) is the force that the material on one side (top ball) exerts on the material on the other side (bottom ball), divided by the area of the surface.
Glass vase with the craquelé effect. The cracks are the result of brief but intense stress created when the semi-molten piece is briefly dipped in water.[6]

In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material. For example, when a solid vertical bar is supporting a weight, each particle in the bar pushes on the particles immediately below it. When a liquid is in a closed container under pressure, each particle gets pushed against by all the surrounding particles. The container walls and the pressure-inducing surface (such as a piston) push against them in (Newtonian) reaction. These macroscopic forces are actually the average of a very large number of intermolecular forces and collisions between the particles in those molecules.

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