In this paper the acoustic pressure analysis in a thick-walled hollow cylinder similar to a solid propellant rocket motor with non-uniform port geometry is carried out for meeting the requirements of various types of canister designs for industrial applications. | Journal of Automation and Control Engineering Vol. 6, No. 1, June 2018 Studies on Acoustic Pressure Fluctuations in Thick Walled Hollow Cylinder for Various Industrial Applications Jithin Ambarayil Joya, Muhammad Sajjad b , and Dong Won Jungc* Department of Mechanical Engineering, Jeju National University, Jeju, South Korea Email: ajithinjoy30jan@, bmsajjadtheone@, *cjdwcheju@ deformation begins in a material or risk of fracture is to be expected. In addition to this, designer will have to consider the possible deformation in machine parts exposed to high level of stresses. Deformation is an observable and a measurable physical phenomenon and is of prime interest for design engineers. When a deformable solid material is subjected to some external loading systems such as pressure or temperature, it has been observed that firstly solid deforms elastically. If the loading is continued, then material deforms plastically, and if loading is further continued, it gives rise to time dependent continuous deformation known as creep deformation. It may be possible that number of transition states may occur at the same critical point, so the transition function will have different values at this point. This critical point is known as a multiple point and each branch of it will correspond to a different state. In general, the material from elastic state can change into (i) plastic state, or (ii) creep state, or (iii) first to plastic state and then to creep and vice-versa, depending upon the nature of loading. All these final states are reached through a transition state. Elastic-plastic and Creep stresses for thick-walled homogeneous and nonhomogeneous cylinders under internal pressure have been analyzed by many authors [916]. All these authors considered yield criteria, jump conditions, linear strain measure to calculate the stresses by using concept of infinitesimal strain theory. Transition theory [7] does not require any of the above .
