Electrical solderless or soldered connectors
Right at the end of the solder (or the crimp barrel) it goes from a rigidly held section of metal to an unsupported section. This becomes the stress point when there is any movement. Need to break a piece of metal? Clamp it in vise and bend back and forth. You've seen it. You've likely done it.
These soldered connections do not see much stress because there is little mass in the wire sections and the other end is held rigid.
Most of the terminals on the car had a second crimp that holds the insulation. This provides support so wire movement is not concentrated at the end of the flexible portion of the wire.
All those cable supports that us mechanics (shade tree) thought were placed there to anoy us - turns out they were there for a reason.
Right at the end of the solder (or the crimp barrel) it goes from a rigidly held section of metal to an unsupported section. This becomes the stress point when there is any movement. Need to break a piece of metal? Clamp it in vise and bend back and forth. You've seen it. You've likely done it.
These soldered connections do not see much stress because there is little mass in the wire sections and the other end is held rigid.
Most of the terminals on the car had a second crimp that holds the insulation. This provides support so wire movement is not concentrated at the end of the flexible portion of the wire.
All those cable supports that us mechanics (shade tree) thought were placed there to anoy us - turns out they were there for a reason.