Nonlinear Analysis Archives - ESRD https://www.esrd.com/support/software-faqs/category/stresscheck-applications-advanced-features/nonlinear-analysis/ Engineering Software Research and Development, Inc. Fri, 12 Nov 2021 21:17:58 +0000 en-US hourly 1 https://wordpress.org/?v=6.7.2 https://www.esrd.com/wp-content/uploads/cropped-SC_mark_LG72ppi-32x32.jpg Nonlinear Analysis Archives - ESRD https://www.esrd.com/support/software-faqs/category/stresscheck-applications-advanced-features/nonlinear-analysis/ 32 32 How Do I Improve Stress Fitting Errors for 3D ITP Solutions? https://www.esrd.com/support/software-faqs/improve-stress-fitting-errors-itp/ Fri, 12 Feb 2021 02:03:40 +0000 https://esrd.com/?post_type=epkb_post_type_2&p=19504 You need to be logged in to view this content. Please Log in. Not a member? Register.]]> When Is Incremental Plasticity Theory (IPT) a Viable Option? https://www.esrd.com/support/software-faqs/incremental-plasticity-viability-checklist/ Thu, 11 Oct 2018 01:32:09 +0000 https://esrd.com/?post_type=faq&p=8077 In order to determine the applicability and viability of representing loading/unloading events via incremental plasticity theory (IPT), it is important to conduct pre-solution checks before performing potentially time-consuming nonlinear analyses.]]>
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]]> How Do I Increase the Nonlinear Material Stress-Strain Plot Resolution? https://www.esrd.com/support/software-faqs/increase-nonlinear-material-stress-strain-plot-resolution/ Thu, 17 May 2018 20:10:59 +0000 https://esrd.com/?post_type=faq&p=6756 The stress-strain curve can be plotted for nonlinear materials in the Material tab, Assign sub-tab by clicking the Plot button in the bottom right of the dialog:]]>
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]]> Why is a Nonlinear Solution Failing? https://www.esrd.com/support/software-faqs/nonlinear-solution-failing/ Mon, 30 Apr 2018 21:15:04 +0000 https://esrd.com/?post_type=faq&p=6755 Assuming the discretization error was small in the linear solution, the following may cause the Material or General Nonlinear algorithm to fail, producing a LAPACK, element stiffness generation, or some other error:]]>
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]]> How Can I Perform a Compression Only Spring Analysis? https://www.esrd.com/support/software-faqs/compression-only-normal-spring-analysis/ Thu, 05 Apr 2018 04:04:49 +0000 https://esrd.com/?post_type=faq&p=6507 If all that is required is to simulate load transfer to holes or a compression-only reaction is desired for a single part, thereby reducing the computational time required for multi-body contact, normal springs combined with a Material or General Nonlinear analysis may be an efficient workflow.]]>
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]]> Do I Need the Nonlinear Solver for Multi-Body Contact? https://www.esrd.com/support/software-faqs/when-nonlinear-solver-needed-multi-body-contact/ Wed, 14 Feb 2018 21:50:56 +0000 https://esrd.com/?post_type=faq&p=6079 When elastic-plastic effects do not need to be considered in a multi-body contact analysis (i.e. the converged maximum von Mises stress in the parts is below the yield stress of the materials), only the Linear Elasticity solver is required.]]>
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]]> Which Nonlinear Solution Type (i.e. Material or General) Should I Choose? https://www.esrd.com/support/software-faqs/nonlinear-solution-type/ Sat, 25 Nov 2017 08:01:39 +0000 https://esrd.com/?post_type=faq&p=5066 The Nonlinear solver enables two types: Material (NL Mat) or General (NL Gen).  The Nonlinear solver interface is below:]]>
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]]> What is Required in a Fastener Element Analysis? https://www.esrd.com/support/software-faqs/fastener-element-analysis/ Thu, 23 Nov 2017 02:23:01 +0000 https://esrd.com/?post_type=faq&p=5055 The StressCheck fastener element is used to represent filled hole simulations in 2D/Planar, with or without shear connections to other Planar bodies.]]>
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]]> What are the Nonlinear Solver Limitations with Multi-Body Contact? https://www.esrd.com/support/software-faqs/nonlinear-solver-multi-body-contact/ Wed, 22 Nov 2017 21:06:38 +0000 https://esrd.com/?post_type=faq&p=5020 Currently, there is not a capability to combine incremental plasticity (Type: Material (NL Mat) with Technique: Incremental) or general/geometric nonlinear (Type: General (NL Gen)) solutions with multi-body contact.]]>
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]]> Can the Principal Stresses Be Greater Than the Maximum von Mises Stress for a Material Nonlinear Analysis? https://www.esrd.com/support/software-faqs/principal-stresses-greater-than-von-mises-stress-material-nonlinear-analysis/ Mon, 23 Oct 2017 20:43:55 +0000 https://esrd.com/?post_type=faq&p=4621 The von Mises yield criterion (also known as the Maximum Distortion Energy Theory of Failure) is a pure shear based criterion (i.e. plasticity occurs as the crystals shear across lattices). Therefore part of the assumption implies that the hydrostatic component of the stress tensor (which cause no shear) are completely ignored.]]>
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