By Hsu MD
AAOS Atlas of Orthoses and Assistive units by way of Hsu MD, John D., Michael, John, Fisk MD, John [Mosby,2008] (Hardcover) 4th variation [Hardcover]
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Additional resources for AAOS Atlas of Orthoses and Assistive Devices, 4th Edition
This yields a joint with maximum bearing strength. Figure 3-44 illustrates these requirements. Rivet holes Recommended hole sizes for cold driven aluminum alloy rivets are listed in Table 3-6. Consideration should be given to the fact that holes may wear and elongate in high-stress areas. It may be desirable to apply a hole slightly smaller than optimum and then use a newer slightly larger hole and rivet after some time in service, thus extending the life of the joint. Minimum distance between rivets is three times rivet diameter; maximum distance is two to four times plate thickness t T Plate thickness Minimum distance is two times rivet diameter Rivet diameter not less than T or greater than three times t Fig.
For aluminum members made of 2024, 2017-T4 rivets can be used; the 6000 series rivets are compatible with 3000 series members. Riveting stainless steels Advances in welding techniques have made this type of joining operation suitable for stainless steels. However, riveting still offers many advantages. It is a quick method of joining and requires a minimum of accessory equipment. Also, as in the case of aluminum, cold riveting is not associated with the hazards involved in the intense heat applications of the welding process.
3-34 Heat treat cycle. C e ac Normalize rn Fu Air cool A rate rolled Cont cooling of Critical range Temper The stress–strain diagram (Fig. 3-35) compares several steels and aluminums that have been heat treated and/or tempered in a variety of ways. Because all of the aluminums have the same chemical composition (AISI 2024), the effect on the mechanical properties of differing types of heat treatment is clearly demonstrated by the aluminum curves. For instance, the yield and ultimate strength of the annealed alloy (2024-0) were raised from 11,000 psi and 27,000 psi to 71,000 psi and 75,000 psi, respectively, when heat treated (2024-T86).
AAOS Atlas of Orthoses and Assistive Devices, 4th Edition by Hsu MD