There are different ways to make a person submit in Brazilian Jiu Jitsu. Joint locks are an option but there are some who say that this is not effective when dealing with an opponent. Is this true? Some beg to differ and say that the one who is trying to do it does not know how to do this properly. Here is why.
It is possible that poor mechanics were the cause which is why it did not happen properly. Maybe you don't practice it often which is why you are unable to put your body weight or strength specifically to the joint that you intended.
If you are fighting a more experienced opponent, it is possible that they have a high tolerance for pain. This can also happen if you are attacked by someone who is under the influence of drugs or alcohol. When faced with this situation, you better have something else in your arsenal to deal with this individual.
Here are two things you can do.
First, do the Rear Carotid Restraint by first reaching deep in front of the attacker toward his stomach and then molding your biceps against the side of the neck. You then bend your arm so that your elbow is pointed straight down and the crook of your elbow is directly below his trachea.
Now reach up high and grab your own shoulder or simply grasp a handful of his shirt at the same time letting your biceps and the inside of your forearm should press on the sides of the neck.
With your free hand behind his head, use it to push the back of his head forward while pushing with the elbow that encircles his neck into his chest as though you are squeezing it towards his spine. Push and pull with all your strength and shrug his shoulders up as though he is being hanged until his body goes limp.
The other option is the guillotine choke. You first to first pull his head down by placing your hand on his neck or by pulling down on his shirt so he is facing the ground. Put your arm around his neck into a position similar to a headlock then slide your forearm down under his chin and around his neck making sure that the blade of your forearm is against his neck.
Grasp the wrist of your choking arm with your free hand while keeping this grip on his neck tightly so that his head is wedged under your arm. Put one of your legs slightly forward, stand up straight and twist your hips in the direction of your forward leg whichever you are using to execute this choke and get the same result as the first.
Brazilian Jiu Jitsu is not the only martial art that uses joint locks to make an opponent submit. This is also used in other martial arts style such as Aikido, Catch Wrestling and Judo so it's quite old and has been proven time and again to be effective.
If you are unable to do this correctly, the problem lies with you so talk to your instructor and let him see how you do it. Remember, observation and practice is essential in order for you to perform joint locks in Brazilian Jiu Jitsu.