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本文对于线性应变硬化刚塑性材料构成的矩形截面简支梁在中央集中载荷作用下的载椅——挠度关系进行了研究。文中不仅考虑了应变硬化效应使梁的极限弯矩增大的作用,而且还考虑了由于应变硬化而引起的塑性区的扩展所致的挠度改变对于梁的束载雄力的影响。研究表明:不仅仅材料的应变硬化特性对于梁在屈服后的承载能力有显著的影响,梁的几何特征长细比也对梁在屈服后的承载能力有显著的影响。
In this paper, the load-deflection relationship of a simple-supported rectangular beam composed of linear strain-hardening rigid-plastic material under central concentrated load is studied. In this paper, not only the effect of strain hardening on the ultimate bending moment of the beam is considered, but also the influence of the deflection change caused by the expansion of the plastic zone caused by the strain hardening on the beam load of the beam is considered. The results show that not only does the strain hardening behavior of the material have a significant effect on the bearing capacity of the beam after yielding, but the geometrical aspect ratio of the beam also has a significant effect on the bearing capacity of the beam after yielding.