﻿GET_GEVOMechL2_01_01_01_08 - ANIMATION Screen
1
00:00:00,000 --> 00:00:02,708
You can think of the fastener as a spring.

2
00:00:02,708 --> 00:00:11,875
It may seem odd to think of the engine as being held together by springs, but this analogy helps show what happens when the bolt and nut are tightened.

3
00:00:11,875 --> 00:00:17,875
Rotating the bolt or nut, which in turn stretches the spring, generates preload force.

4
00:00:17,875 --> 00:00:25,083
The more the bolt or nut is rotated, the more the bolt stretches and generates more preload or spring tension.

5
00:00:25,083 --> 00:00:33,292
When no tension load (Ft) is applied to the joint, the clamping force (Fc) equals the preload force (Fp).

6
00:00:33,292 --> 00:00:38,292
If the tension load is equal to the preload, there is no clamping force.

7
00:00:38,292 --> 00:00:44,708
If the tension load is increased beyond the initial preload force, the joint separates.

8
00:00:44,708 --> 00:00:54,458
Even after the joint separates, it continues to take increased tensile loads until the ultimate tensile strength of the fastener is reached and the fastener breaks.

9
00:00:54,458 --> 00:01:04,167
From a practical standpoint, joint failure occurs well before the fastener actually breaks because the parts being held together will loosen and not function properly.
