When the stress is unloaded at the K point on the stress-strain curve, the corresponding stress-strain relationship can be represented by in the shown figure.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/b89120dd129d484da273f07288cf8f7a.png
举一反三
- An equal cross-section straight rod is exerted by the loads shown in the figure, the cross-sectional area of the rod is A=100mm2. Determine the normal stress on the cross-section m-k.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/23fd5f3f3d6d4bb99e3cc743abf84ff6.png
- During no portion of this curve is the stress(应力) proportional to the strain(应变).
- In the fixedly combined circular shaft shown in the figure, the central part of the material is steel, shear modulus G1=80GPa, the outer material is copper and the shear modulus G2=39GPa. The distribution of shearing stress on cross section is___after torsional deformation. ① ② ③ ④http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/e48a2be70d9f4eec8d38b0270076b6e2.png
- 逻辑函数F (A,B,C)=Σ m (0，1，4，6)的最简与非-与非式为（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/6677dfd1ca0a4255871fff8d24c1bfe1.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/5556e6fba4d849c988d994a19156d44a.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/6f296abd190d40b19f2f737f02c7adca.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/b2bf2478b09b4e6ab818d71adb4a8715.png"/>
- The English teacher laid particular ( ) the need of reading aloud. A: stress on B: importance C: stress to D: strain on