文档介绍：材料力学实验报告答案

篇一：材料力学实验报告答案
力学实验报告
标答
案
准
目录
一、拉伸实验···············································································2 二、压缩实验···············································································4 三、拉压弹性模量E测定实验···················································6 四、低碳钢剪切弹性模量G测定实验·······································8 五、扭转破坏实验····································································10 六、纯弯曲梁正应力实验··························································12 七、弯扭组合变形时的主应力测定实验··································15 八、压杆稳定实验······································································18
一、拉伸实验报告标准答案
实验目的：见教材。实验仪器见教材。
实验结果及数据处理：例:(一)低碳钢试件
强度指标:
Ps= ζs= Ps/A P b = ζb= Pb /A 塑性指标:
L1-LA?A1
伸长率???100%? %面积收缩率???100%? %
LA
低碳钢拉伸图:
（二）铸铁试件
强度指标:
最大载荷Pb = KN
强度极限ζb= Pb / A = M Pa
问题讨论：
1、为何在拉伸试验中必须采用标准试件或比例试件,材料相同而长短不同的试件延伸率是否相同?
答:拉伸实验中延伸率的大小与材料有关,,,这样其有关性质才具可比性.
材料相同而长短不同的试件通常情况下延伸率是不同的(横截面面积与长度存在某种特殊比例关系除外).
2、分析比较两种材料在拉伸时的力学性能及断口特征.
答:试件在拉伸时铸铁延伸率小表现为脆性,低碳钢延伸率大表现为塑性;低碳钢具有屈服现象,,且有450的剪切
唇，断口组织为暗灰色纤维状组织。铸铁断口为横断面，为闪光的结晶状组织。.
教师签字:_ _______
日期:___ _____
二、压缩实验报告标准答案
实验目的：见教材。实验原理：见教材。
实验数据记录及处理：例：(一)试验记录及计算结果
篇二：材料力学实验报告标准答案
目录
一、拉伸实验···············································································2 二、压缩实验···············································································4 三、拉压弹性模量E测定实验···················································6 四、低碳钢剪切弹性模量G测定实验·······································8 五、扭转破坏实验····································································
10 六、纯弯曲梁正应力实验··························································12 七、弯扭组合变形时的主应力测定实验··································15 八、压杆稳定实验··················································