Aeroengineer is absolutely right. Can't believe the guy making the video see no loading in the upper arm and didn't give any reaction... But he may be just a software guy, not engineer.
The lower arm sees a lot of bending load since it has the spring/damper connected to it, while the upper arm is free to move, and sees no bending forces in ideal conditions. This is the reason that the lower wishbone has been designed heavier and stronger than the upper.
+Harshit Rathore i didnt understand what is wrong with his analysis - everybody says so. Upper arm is two edge pinned and almost no load on it. Its true - lower arm has a pin in the middle and that create bending. (Moreover applied forces are only in Z direction - he ignored x and y) if there were x direction forces considere (like a drift car) then buckling would occur on the upper arm It looks true to me - correct me if i am wrong... Thanks
Yes, you are correct. He has taken only z-axis loads, ignoring cornering forces and brake torque. With those considered, upper wishbone will see tensile and compressive loads.
+Harshit Rathore aeroengineer refers to hinge constraints which is totally irrelevant with what he claims. so its because of direction of forces only...
+EYUP FIRAT AYDIN Pardon me, it's been a long time I commented on this video, so I didn't read aeroEngineer's comment before commenting. He is right though, if the hinge constraint is not set for the damper, the joints would be considered as fixed, and one would see considerable deviations in the results from the expected results.
