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Stress and Strain - Axial Loading

Axial Rod Reactions with Redundant Support

Description

Axial rod reactions with a redundant support are found by combining equilibrium with deformation. The structure here uses two cylindrical rods, one steel and one brass, joined at point B and held by rigid supports at points A and C. The goal is to determine the reactions at A and C and the deflection at B.

Transcript

考虑两根圆柱形杆,一根为钢制,另一根为黄铜制,在 B 点连接,并在 A 点和 C 点由刚性支撑固定。

确定 A 点和 C 点的支座反力。同时,确定 B 点的挠度。

此处,杆件结构被视为静不定结构,因其支撑数量超过维持平衡条件所必需的数量,导致未知反力的数目多于平衡方程的数目。

因此,将点 C 处的反力视为多余约束,并从支座中释放,作为附加载荷处理。

然后,采用叠加法确定杆件结构各段的变形,并将其组合以求得总变形量。

 根据总变形表达式、杆件结构的总变形等于零以及所有载荷的合力等于零的条件,可确定未知的反作用力。

通过叠加杆件结构中B点之前各段的变形,计算B点的挠度。