1977-02-01

Finite Element Analysis of Prying Action in Bolted Joints 770545

ABSTRACT

Structural connections involving a T-stub arrangement often result in fasteners loaded in tension. The working load developed in the fastener is dependent upon the stiffness and deformation of the T-stub itself. Tests have shown that this “prying action” phenomenon can influence fastener performance. A number of analytical and experimental models has been developed to predict the relationship between applied

forces and subsequent bolt forces. It is felt that the detailed analysis provided by finite element theory could add additional insight into this phenomenon by more rigorously defining the load distribution between connected members. Finite element analyses could then be utilized to efficiently evaluate the effects of alternative support and fastener stiffnesses and variations in fastener pre-load.

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