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机械强度无疑是工程力学的一个重要方面,工程力学作为力学的主流总是与当代重要工程或工业相连系的。这一特点可从力学的发展史和工程技术的进展中体现出来,也就是学科的最大推动力在于实践。作为一个大学工科力学教师,我们在开始讲授力学时常提到公元前四百多年墨经中“力乃形之所以奋”,这当然是一种定性的论述。稍后阿基米德(287—212 AD)的杠杆定理已是一种定量的描述。其实我们的祖先发明的火箭,那时也已显示:推出一部分物质向后运动会使主体向前推进。在力学或结构工程课中我们都提到早年赵州附拱石桥,应县木塔(66米高)和隋代(六,七世纪)以及宋元的巨船,这些都体现了我们祖先的匠心独运,劳动智慧的结果,它
Mechanical strength is undoubtedly an important aspect of engineering mechanics, engineering mechanics as the mainstream of mechanics is always associated with the important contemporary engineering or industry. This feature can be reflected in the development history of mechanics and engineering and technology, that is, the biggest driving force of discipline lies in practice. As a university engineering mechanics teacher, we began to teach mechanics often mentioned in the 400 BC BC Mojing “power is the reason why the shape”, of course, is a qualitative argument. The lever theorem of Archimedes (287-212 AD) later is a quantitative description. In fact, the rockets invented by our ancestors have also shown at that time: Part of the material backward movement will make the main body move forward. In the course of mechanics or structural engineering, we all mentioned the early years Zhaozhou attached Gongshi Bridge, Ying County Wooden Tower (66 meters high) and the Sui Dynasty (6th and 7th centuries) as well as the Song and Yuan dynasties, all of which reflected our ancestors’ Ingenuity, the result of the wisdom of labor, it