The selection of a suitable stress method to easily and quickly solve a plane problem in elasticity is expounded through comparing the stress function method with the stress component method.

通过对应力函数法与应力分量法的比较，论述了按应力求解弹性力学平面问题时，如何选择合适的解法，以取得难度小、求解快的效果； 并讨论了应力分量法的局限性。

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If there is a mechanical problem with a plane, or a pilot is sick, then chances are the flight will be canceled.

NPR: Holding Pattern: Flight Delays are Going Up, Up, Up

Another problem: building a plane that would stabilize itself if a user put down its controller.

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The A350's delay is due to a production problem involving drilling holes in the plane's wings.

BBC: Airbus delays A350 XWB entry as EADS profits triple