Nonlinear Finite Element Analysis for Structural Engineering
Presented By: Venkata P. Nadakuditi, P.E.
Engineers employ finite element analysis (FEA) to predict the behavior of complex systems where traditional engineering methods are not well-suited, large numbers of tests are impractical, and/or sensor access is limited. This presentation will introduce the application of FEA to nonlinear behavior, including that related to material nonlinearity and geometric nonlinearity. Two project examples will demonstrate the practical application of nonlinear FEA for structural engineering. The first example will focus on the prediction of end region cracking in prestressed concrete girders. The second example will focus on strength and fatigue evaluation of a portable steel tank. The nonlinear FEA results from both examples will be compared to either field or in-house test results obtained by WJE.
Venkata Nadakuditi is an engineer at Wiss, Janney, Elstner Associates, Inc. He specializes in strength, fatigue and fracture mechanics in metals with primary interests in steel structures and pressurized containing systems. Prior to joining WJE in 2016, Mr. Nadakuditi spent his career in the oil and gas industry. His past work included extreme event strength assessments, extreme event strain-based assessments, defect acceptance criteria, fatigue life predictions, and experimental testing. He has experience using API 579, BS 7910, ABAQUS finite element software, special purpose fracture mechanics software programs, classical methods, and design documents (e.g., API, ASME, AISC, BS, DNV) to calculate defect acceptance criteria, material requirements, remaining fatigue lives, strength, and ductility.
He received his MS from the Pennsylvania State University. He is a registered professional engineer in Texas.