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弯幽应力( Stresses in Beams) 、公式的应用范围 (T he applicable range of the flexure formula 1.在弹性范围内 (All stresses in the beam are below the proportional limit) 2.具有切应力的梁( The beam with the shear stress)L/h≥5 3.平面弯曲( Plane bending) 4.直梁( Straight beams) 三、强度条件( Strength condition 梁内的最大工作应力不超过材料的许用应力 1.数学表达式( Mathematical formula)mnx=mx≤|o 用用 W(Stresses in Beams) 二、公式的应用范围 (The applicable range of the flexure formula ) 1.在弹性范围内 (All stresses in the beam are below the proportional limit) 3.平面弯曲(Plane bending) 4.直梁(Straight beams) 2.具有切应力的梁(The beam with the shear stress) l / h  5 三、强度条件(Strength condition) 1.数学表达式(Mathematical formula) [ ] max max σ W M σ =  梁内的最大工作应力不超过材料的许用应力
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