一、机械强度研究的重要意义机械强度是指机械在预定工作寿命时间内承受载荷而不失效的能力.设计师的重要任务之一,就是保证机器在完成指定的工作任务下,根据所受外力决定机器或结构的大小及形状,使设计的机器或结构在要求的服役期间能抵抗所受的外力而没有过分的变形或断裂发生.通常机器或结构的设计是把应力和变形限制在弹性范围之内,弹性理论和现代计算方法,可以帮助设计师进行理论分析和计算.但是,由于许多机器或结构的形状和受力状态比较复杂,理论分析和计算有时很困难,甚至得不到正确的结果,必须借助强度实验分析方法才能解决.有时设计师遇到上述 First, the significance of mechanical strength research Mechanical strength refers to the mechanical life in the scheduled load-bearing capacity without failure.One important task of the designer is to ensure that the machine to complete the specified task, according to the external force Determine the size and shape of the machine or structure so that the designed machine or structure is resistant to external forces without undue deformation or rupture during the required service period.Generally the machine or structure is designed to limit the stresses and deformations within the elastic range However, since many machines or structures have complex shapes and forces, theoretical analysis and calculations can sometimes be difficult or impossible to achieve As a result, it must be solved by means of an intensity experimental analysis, and sometimes the designer encounters the above