Thank you giradman for your reply.
It's not the way I actually plug the head part in that's the problem it's when I am using the iPad. I am not very mobile so, I use it while sitting. The trouble is that iPad and cable rest against my stomach and it is this that bends the cable at the neck. So the simple procedure of holding the iPad and then putting it down causes the cable to flex the next time I pick it up to use it. This eventually causes a strain on the wires which after a short time become disconnected or broken. I wouldn't mind if this happened after a lot of use but I've only had the new charging cable for a few days. This hasn't been thought out in the designing of the cable. Its ok if you are only using the cable to charge, but I am using the iPad a lot of the time while charging. The only thing I can do is to use the iPad unconnected till the icon registers about 5% battery, then charge it, but this is inconvenient. If the charging slot had been located on the opposite edge of iPad then I would have no bother.