Monthly archives: March, 2021

Critical Bearing Area for Bolted Joints, Part 1 – 3/15/21

Engineers occasionally run across situations where bolted joints have “loosened” even when head and/or nut positions have been marked with scratches or paint.  This is known as “non-rotational loosening”. Several things can cause that.  First of all, the components within the grip of the fastener must be checked for yielding (embedment or creep), causing “joint …