These are known as the nine components of stress and are illustrated with reference to an infinitesimal rectangular element about a point in figure1.2.

它们被称为应力的九个分量，均示于图1。2中一点附近的无限小的平行六面体单元上。

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These are known as the nine components of stress and are illustrated with reference to an infinitesimal rectangular element about a point in Figure 1. 2.

它们被称为应力的九个分量，均示于图1.2中一点附近的无限小的平行六面体单元上。

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Some believe that the hardened gray iron used to make the components simply "fatigues" with age-as metal parts that go through millions of stress reversals eventually do.

有些人认为硬化的灰铸铁过去曾使零件很容易腐朽老化(因为经过数百万次的应力反向处理后的金属零件最后都会这样)。

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"We are collecting in-service aircraft components to asses the remaining characteristics and capability in terms of stress and fatigue, " says Olivier Malavallon, project director of business development and change at Airbus.

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