Stress Linearization Tool Development
Calculation, FEA, DSET, MAPLE
FE codes often provide tools for postprocessing, however different codes offer different tools, and sometimes we may need to use a tool which isn’t included within a particular package.
We may also want to build on the capabilities of existing software functionality with our own custom tools.
Undertaking these activities give us confidence in the tools we use and provides options to verify our results effectively. By producing our own engineering tools, they become non code specific, allowing the possibility for DOCAN to utilize any function regardless of the code we use for analyses.
The procedure for stress linearization is defined in ASME VIII Div. 2 ANNEX 5-A and involves the integration of the stress distribution through the stress field being linearized. The requirements are to identify the component stresses along a line from FEA results, perform calculations including numerical integration to generate linearized stresses.
The DOCAN solution
One example of DSET (DOCAN Stress Engineering Tools) is our in-house stress linearization tool. We used Simpson’s rule to evaluate the integrals of the stress distributions. This is a simple and more accurate form of numerical approximation than trapezium rule. The data is then processed, and the linearized stresses are calculated.
DOCAN have produced a tool that can import the component stress data, calculate membrane, membrane + bending, and peak stresses, identify the maximums, and display all graphically.
|Calculation Process||ASME VIII Div 2|
|Application production||User interface|