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导言以往,国内外论述平面受弯杆件变位计算的文献基本上偏重于量的计算而忽视了对其物理实质的揭露。所以,人们长期以来对这一重要物理现象规律的描述缺乏统一的直观的物理图象。众所周知材料力学各种基本变形在内力为常量条件下的胡克定律,其物理概念是很鲜明的;即在一定范围内,内力与其相应变形之间的变化成正比关系。但在内力很少为常量的平面弯曲变位计算中则缺乏类似描述。例如求梁挠轴曲线的挠度和转
Introduction In the past, the literatures at home and abroad on the calculation of the displacement of flat bars subjecting to the calculation basically neglected the disclosure of their physical substance. Therefore, people have long described the law of this important physical phenomenon lacks a unified and intuitive physical image. It is well known that all kinds of basic mechanics of material mechanics have Hooke’s law under the condition of constant force, and its physical concept is very distinct; that is, within a certain range, the internal force is directly proportional to the change between its corresponding deformations. However, a similar description is lacking in the calculation of plane bending displacement where the internal forces are seldom constant. For example, ask the deflection curve of the beam deflection axis and turn