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在纯弯曲组合曲梁正应力公式的基础上，进一步导出了径向应力的计算公式，并对组合曲梁径向应力对弯曲正应力的影响进行了估算，给出了弯曲正应力公式的适用参考范围
On the basis of the normal stress formula of purely curved composite curved beam, the formula of radial stress is further derived and the influence of radial stress on the normal bending force is evaluated. The formula of normal stress of bending is given Reference range