SILA research group has a wide range involving structural integrity issues in industrial components and advanced materials. For each area of research during the years SILA developed numerical procedures to tackle many challenges. All these numerical procedures based on the Linear Matching Method (LMM) are fully incorporated within the Linear Matching Method Framework (LMMF).
Limit load assessment
A numerical procedure, based on a special case of the shakedown procedure, has been developed to accurately calculate the plastic collapse of structures. This procedure has been widely adopted in several industrial application, such as pipes or pressure vessels.
Shakedown limits assessment
The efficient and accurate assessment of elastic and global shakedown limits is a core capability of the Linear Matching Method Framework. Complex structures, subjected to arbitrary cyclic load histories can be assessed, also providing upperbound and lowerboud limit.
Low Cycle Fatigue assessment
The low cycle fatigue life can be determined by understanding the cyclic response of the structure. This is done by adopting the Direct Steady State Cyclic Analsis (DSCA) developed by SILA research group. This numerical approach is capable of predicting the cyclic behaviour of a component subjected to any cyclic load history.
Creep Rupture Limit
SILA has experience in calculating the rupture limit of a structure for a wide range of applications. The numerical procedure developed and implemented within the Linear Matching Method Framework has been proved to be more accurate and less conservative than rule based method such as the R5 Procedure.
In order to evaluate the steady state cycle of a structure subjected to a cyclic load with one or more creep dwells the extended Direct Steady State Cycle Analysis (eDSCA) has been introduced within the LMMF. This numerical method allows to accurately calculate the creep and fatigue damage, considering the full creep and fatigue interaction.
Real Components Studies
SILA research group has an extensive experience in dealing with real practical problems, involving the integrity of components operating under cyclic load and high temperature conditions. SILA's experience includes but does not limit to weld , pipes, pressure vessels or turbine blades.
Metal Matrix Composite
Metal matrix composite (MMCs), are being developed very rapidly rapidly to keep up with the requirements of several applications in aerospace and automotive industrial sectors. This research is aimed to develop a novel simulation technique based on direct methods and homogenization theory in order to effectively and accurately capture the complicated creep-fatigue interaction of both particle and fibre reinforced metal matrix composites in the micro scale.
This research is conducted in collaboration with Siemens Industrial Turbomachinery. It involves the development of crack growth modelling techniques for high temperature and high-stress components and has included the use of the eXtended Finite Element Method (XFEM) and the Linear Matching Method (LMM).