Impact Simulation of composite pressure vessels
One of the disadvantages of composite materials is their weakness against impact loads. It is important to study the impact of impact on composite pressure reservoirs due to their sensitive conditions in various industries such as marine, aerospace, and automotive industries.
Impacts on composite materials cause damage to them. These injuries are not visible to the naked eye and can reduce the strength of the material by up to 60%. In Abaqus software for shell elements, the Hashin degradation criterion can be used to simulate the progressive degradation of composite materials; But this is not possible for three-dimensional elements. Therefore, in the present project, progressive destruction code based on continuous damage mechanics (CDM) and smeared cracking method has been written to simulate damage. This code can show the damage modes one by one and separately. In this code, Hashin three-dimensional criterion and maximum stress criterion are used to evaluate the onset of injury and identify injury modes.
In this study, the effect of torque damage has also been investigated. Sheet metal usually reduces the residual strength of composite materials. This type of damage is usually seen between layers with different fiber orientations.
Impact on composite pressure vessel
Finally, a composite pressure vessel was subjected to impact loading according to ASME section 10 in finite element software and damage growth was investigated; The amount of residual compressive strength under impact loading was then investigated. The results of this study showed that low-velocity impact damage reduces the residual strength of composite internal pressure reservoirs by 30 to 60%.
The design of the pressure tank, impact simulation and damage assessment in engineering software such as Abacus and Ensys requires the expertise that our engineers in the company have the necessary expertise in this field.