文档介绍：CHAPTER 15 FOUNDATIONS OF THE
Mechanics of Materials
材料力学
第十五章实验应力分析基础
CHAPTER15 FOUNDATIONS OF THE STRESS ANALYSIS IN EXPERIMENTS
§15–1 SUMMARY
§15–2 PRINCIPLE AND APPLICATION OF THE STRAINOMETER OF THE RESISTANCE
§15–3 PRINCIPLE AND APPLICATION OF THE PHOTOELASTICITY
第十五章实验应力分析基础
§15–1 概述
§15–2 电阻应变计法的原理及应用
§15–3 光弹性法的原理及应用
§15–1 Summary
一、Function of the stress analysis method in experiments :
1. Determine the reasonable dimension and the structureal form of a ording to the tested stress or strain of the model in designing.
2. Test the true stress or strain of a member in work and find out the position and the value of the maximum stress in order to evaluate the safty and reliability of the engineering structure and to provide the basis of improving working ability for the equipment.
3. Analyze the destroyed or failed member and propose the measures of improvement in order to prevent it from destroying again.
4. Test the magnitude,derection and all kinds of dynamic responses of the external load.
5. Explore the new rule from tests and check the theory of stress analysis and the calculation method.
FOUNDATIONS OF THE STRESS ANALYSIS IN EXPERIMENTS
§15–1 概述
一、实验应力分析方法的作用:
,测定模型的应力或变形,依此来确定构件的合理尺寸和结构形式。
,测定构件的真实应力或变形,找出最大应力的位置和数值,以评价工程结构的安全可靠性,并为提高设备的工作能力提供依据。
,提出改进措施,防止再次破坏。
、方向以及各种动响应。
,并对应力分析理论和计算方法进行校核。
实验应力分析基础
二、Brief introduction of methods in the stress analysis of experiments
machinery measuring method.
The figure of measuring deformations in the book annotated by Zheng Xuan(127-200)in the east Han dynasty.
FOUNDATIONS OF THE STRESS ANALYSIS IN EXPERIMENTS
二、实验应力分析方法简介:
1.机械量测法
东汉郑玄(127—200)注释的《考工记•弓人》中的测变形图
实验应力分析基础
Leonardo Da Vinci( 1452-1519).This picture is considered to show the earliest test in Mechanics of Materials.
The tensile test of an iron wire designed by Leonardo Da Vinci.
FOUNDATIONS OF THE STRESS ANALYSIS IN EXPERIMENTS
里奥纳多•达•芬奇(1452—1519)
此图