The figure shows a section of a large coupling. Each bolt in this joint is subjected to cyclic load fluctuating between 0 and 13 kN. The members are made from steel. The members have equal thicknesses...

Extracted text: The figure shows a section of a large coupling. Each bolt in this joint is subjected to cyclic load fluctuating between 0 and 13 kN. The members are made from steel. The members have equal thicknesses and total length of members is L=37 mm. Each bolt is initially tightened carefully to 78% of proof load. The bolt is to be Metric grade 5.8 M12x1.75 (coarse-pitch series). The threads has been manufactured by rolling and reliability for bolts is 95%. Calculate the stiffness of the bolt (in kN/mm). Yanıt: