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Engineering

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Mechanical Engineering

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Concept of Stress

Boom and Rod Stress Analysis

Description

Boom and rod stress analysis shows how a pinned support structure carries a load. The boom and the rod are connected by a pin and held in place by brackets and pins. The structure is then separated from its supports so the forces can be studied clearly.

A free-body diagram is drawn to identify ev...

Transcript

考虑一个由悬臂和杆件组成的结构,该结构用于支撑载荷。悬臂和杆件通过销钉连接,并由支架和销钉提供支撑。

首先,为了分析作用在结构上的各种应力,将臂杆和连杆从支撑上拆下,并绘制其受力分析图。

根据平衡方程,可计算出作用在悬臂和杆件上的反作用力。

点 P 处的反作用力导致吊杆受压,而点 R 处的反作用力导致拉杆受拉。

可以利用力的三角形来确定吊杆和连杆对销钉Q施加的力。

由作用在臂架上的轴向力产生的正应力,可通过将该构件所受的力除以臂架的横截面积来计算。

作用在杆上的正应力同样可据此确定。