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Distribution of stresses reduced in the bolt joint of joint No 1 under the action of force of prestress equal to 53.5 kN (variant. 1)
Source publication
This article presents an analysis of the load capacity of the bolt joints of collecting electrodes with the rapper rod, made in HUCK technology. A discrete model of the system of electrodes was worked out for the analysis of stresses in bolt joints, the validation of which was made on the basis of measurement data obtained on the test bench. Two va...
Contexts in source publication
Context 1
... Figures 5 and 6 the distribution of reduced stresses σred typical for the variants analysed are shown, found in the elements being part of the joint (fragments of flat bars of the rod, EZ fragment, spacer sleeves, bolt and ring of the bolt). The status of stresses after loading the joint with only minimal force of pre-stress-Nmin= 53.5 kN is shown on them. ...
Context 2
... of the rod, EZ fragment, spacer sleeves, bolt and ring of the bolt). The status of stresses after loading the joint with only minimal force of pre-stress-Nmin= 53.5 kN is shown on them. And since in the analysed joint tensile stresses are predominant, according to the Mises hypothesis there was reference to the condition: σ1 ≅ σn ≤ σlim. Area A (Fig. 5) constitutes a sensitive zone of the bolt because of the largest stresses - this is the area of necking in the real bolt, i.e. change of the diameter of the bolt and the area where grooves appear at the entrance to the clamping ring. It should be noted that the A area includes the same zone of the bolt where in the actual objects its ...
Context 3
... the 634 MPa. In each of the bolts they are much lower than the stresses permissible for this type of bolt, which according to the data of the manufacturer are σlim= 699 MPa and significantly below the average tensile strength of the material of the bolt specified for Rm≈ 851,5 MPa. The area of maximum stresses in the bolt is located in region A (Fig. 5), i.e. in the section of clenching the bolt with the sleeve. As can be seen in each of the bolts, stresses are well below the permissible tensile stress. In the case of variant v.2 in the bolts of joint Nos. 1 and 2 the value σlim= 699 MPa was exceeded, and in bolt No. 3 the value of reduced stresses received is close to σlim. For the ...
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A simplified finite element model of riveted joints for structural analyses which effectively incorporates nonlinear response of riveted joints is proposed. Load-transfer characteristics of riveted joints were experimentally and numerically studied. First, a detailed finite element analysis for the process of a tensile test of a single-row joint wh...
Citations
The article presents the general characteristics of bolt-rivet joints. The main structural parameters of bolt-rivet rods affecting premature shank tearing are given. Stages of rod installation process into hole are described and critical moments of shank tearing are determined. A graph showing the variation of the rod retraction force depending on the thickness of the package is obtained, and basic parameters are determined for comparing two types of rods with different design, but the same purpose. Methods of determining shank tear- off forces, as well as stresses arising in the neck during retraction, using Femap software product are considered. Maximum stress values are calculated on the example of two types of rods and analysis of possible shank tear is carried out at available parameters of neck. In conclusion, it is noted that with the help of IT-technology it is possible to improve not only the design of joints, but also the technology of their implementation, by changing the design of fasteners.
