junction place support of bending support of shear without moment by bolt bolt tightening shear (neglect friction) Figure 6.10 Local behavior without Bolt Tightening tension shear work in bolt thread support of shear with bolt tightening (neglect friction) Figure 6.11 Bolt tightening Reduces the Possibility of Damage It is the tightening of the bolt that will lead to a distribution of contact pressure between the support component and the facings.The sum of the forces due to this contact pressure will balance out the shear load,while suppressing the risk of separating the facings (see Figure 6.11). The tightening of the bolt is therefore indispensable.However,the laminated facings being fragile cannot admit high contact pressures that are localized under the bolt head and under the nut.This leads to the insertion of metallic washers as shown in Figure 6.12. The bolting accompanied by bonding of the surfaces provides a gain in mechanical resistance on the order of 20 to 30%.On the other hand,the joint cannot be disassembled,and there is an increase in weight. 6.2 BONDING Remember briefly that this assembly technique consists of the adhesion by molec- ular attraction between two parties to be bonded and an adhesive that must be able to transfer the loads.One can cite the principal advantages of this mode of joining: 2003 by CRC Press LLCIt is the tightening of the bolt that will lead to a distribution of contact pressure between the support component and the facings. The sum of the forces due to this contact pressure will balance out the shear load, while suppressing the risk of separating the facings (see Figure 6.11). The tightening of the bolt is therefore indispensable. However, the laminated facings being fragile cannot admit high contact pressures that are localized under the bolt head and under the nut. This leads to the insertion of metallic washers as shown in Figure 6.12. The bolting accompanied by bonding of the surfaces provides a gain in mechanical resistance on the order of 20 to 30%. On the other hand, the joint cannot be disassembled, and there is an increase in weight. 6.2 BONDING Remember briefly that this assembly technique consists of the adhesion by molecular attraction between two parties to be bonded and an adhesive that must be able to transfer the loads. One can cite the principal advantages of this mode of joining: Figure 6.10 Local behavior without Bolt Tightening Figure 6.11 Bolt tightening Reduces the Possibility of Damage © 2003 by CRC Press LLC