Design considerations joints

A snap joint is economical in two respects it allows the structural member to be molded simultaneously with the molded product, and it allows rationalizing the assembly, compared with such other joining processes as screws. Table 3-4 provides a comparison of its advantages and disadvantages. Some examples of the various types and their design considerations are shown in Figs. 3-23 to 3-25. 

Stress relaxation is an important design consideration for sealing applications from O-rings to pipe joints for water, gas, and petroleum pipelines. However, like creep, it has been a relative latecomer in material and product specifications, again largely because of a previous reliance on suitably resistant rubber types. The development of performance-... 

Joints are necessary in large composite structures such as ships because of production and design considerations. These articles are too large to be... 

The strength of a cast-in joint has to be determined only when adhesive/resin failure leads to a total failure of the structure or when the serviceability limits are exceeded due to adhesive/resin failure. This is because in many applications the adhesive/resin is primarily used for purposes other than load transfer and in these cases the bond strength is not a design consideration. 

Design considerations in the joint treatment of dairy and domestic wastewaters are the high chlorine demand and the presence of surface-active agents. In addition, cheese production wastewaters are usually nitrogen deficient. Septicity should be a consideration in the design of any equalization or clarification facilities. 

Dowson D, Fisher J, Jin ZM, Auger DD, Jobbins B (1991), Design considerations for cushion form bearings in artificial hip joints , Proc Inst Mech Eng H, 205, 59-68. 

Initial design considerations require a knowledge of the chemical and physical properties of both adhesive and adherends. Furthermore, an adhesive joint is expected to perform satisfactorily under the expected service conditions, for the planned lifetime of the structure. Thus the change in the properties of the materials involved as a function of the effects of environment, fatigue, temperature, loading rate, and age must also be known, or be predicted. ... 

American Academy of Orthopaedic Surgeons. Implant Wear in Total Joint Replacement Clinical and Biologic Issues, Material and Design Considerations. American Academy of Orthopaedic Surgeons Rosemont, IL 2001. 

Definitions Substrate Design Guidelines Thermal Design Considerations Adhesives Solder Paste and Joint Formation... 

The main design considerations for a silent chain to be used on a drive are the various tensile loads, joint wear, and link plate and sprocket wear. A consideration for silent chains with singlepin joints may be galling. 

Plastic and elastomeric joints. The design of joints for plastic and elastomeric substrates follows the same practice as for metal. However, certain characteristics of these materials require special consideration. 

Fig. 36. Design considerations for bonded joints subjected to primary peel loads.

Thompson, R., Five Design Considerations for Adhesive Bonded Plastic Joints, SME Paper AD85-776, Atlanta, Georgia, 1985. 

First, common joint designs to be found in many industrial applications will be discussed and some basic design considerations reviewed. 

Two other design considerations are pertinent to generalized width versus depth guidelines for reliable simple sealant butt joints. At very low depths, there is usually insufficient bond area of the sealant to the substrates to have reliable adhesion. On the other hand, at very large width-to-depth ratios, buckling of the sealant can occur when the joint contracts. This can cause the sealant to be extruded from the joint where abrasion of the sealant can occur, drastically reducing the sealant life. Extruded sealant can also be a safety hazard in some instances. 

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