TY - CONF
A1 - Müller, Lars
A1 - Schilling, O.
A1 - Ballheimer, Viktor
A1 - Wille, Frank
A1 - Komann, Steffen
T1 - Assessment strategy of numerical analyses of RAM package components - 14619
T2 - WM2014 Conference (Proceedings)
N2 - In Germany current package design safety cases include more and more advanced numerical methods, e. g. finite element analysis (FEA), often in combination with local concepts of strength evaluation of the structure. This approach requires extensive modeling and verification procedures. As a consequence the efforts of authority assessment of design safety analysis increase as well. Only the check of pre- and post-data of numerical calculations is often not sufficient for the safety assessment. On the other hand own analyses of the mechanical problem by performing an Independent numerical modeling and analyzing is not always realizable. Therefore it is necessary to look for optimized procedures of the assessment, without loss of safety. This paper shows possibilities for the assessment strategy of numerical analyses with focus on simple analytical approaches as comparative calculations. Such approaches can be helpful to support evaluation of numerical calculations in the whole assessment procedure.
Three examples are considered to Show which possibilities and limits exist to support the assessment of numerical analyses using analytical comparative calculations. Two examples of bolt and lid analysis show the influence of component and boundary stiffness on the results. Thickness to length/width ratios are partially exceeded and only fixed or free boundary conditions can be analyzed analytical. Nevertheless These analytical approaches can help to evaluate the numerical results for the assessment.
The example of a trunnion demonstrates the limits of analytical approaches. The trunnion shows a complex deformation behavior and local stresses. A single basic theory isn’t matching and a construct of several approaches is not useable for calculations of local stresses. Therefore numerical calculations during assessment are necessary.
Analytical approaches are not always purposeful but often effective to reduce the effort of assessment for numerical analysis of complex and safety relevant components of RAM packages.
T2 - WM2014 Conference
CY - Phoenix, Arizona, USA
DA - 02.03.2014
PY - 2014
UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/31047
AN - OPUS4-31047
SN - 978-0-9836186-3-8
SP - Paper 14619, 1
EP - 14
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany