Residual Stress Archives - ESRD https://www.esrd.com/product-tag/residual-stress/ Engineering Software Research and Development, Inc. Sun, 15 Jan 2023 20:33:32 +0000 en-US hourly 1 https://wordpress.org/?v=6.6.2 https://www.esrd.com/wp-content/uploads/cropped-SC_mark_LG72ppi-32x32.jpg Residual Stress Archives - ESRD https://www.esrd.com/product-tag/residual-stress/ 32 32 StressCheck Tutorial: Incorporating CX Residual Stresses in SIF and J-integral Extractions https://www.esrd.com/resource-library/product/stresscheck-tutorial-incorporating-cx-residual-stresses-in-sif-and-j-integral-extractions/ Thu, 14 Jul 2022 01:21:28 +0000 https://www.esrd.com/?post_type=product&p=25522 Abstract: incorporating coldworked (CX) residual stresses in the computation of fracture mechanics parameters (SIF/J-integral). The following workflow is outlined:
  1. Open existing 3D-Fracture Handbook model (CrackOpenHole-ResidualStresses.scw)
  2. Add parameters, convert material to elastic-plastic, and modify the model boundary conditions for a cold-work simulation
  3. Solve a linear solution, and then solve the cold-work simulation events via incremental plasticity
  4. Use BRS mapping to map the cold-work solution to a new part
  5. Assign BRS load and remote traction, convert material to linear-elastic, and modify constraints to represent the crack face
  6. Solve a linear analysis and extract SIF's/J-integrals
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]]> Efficient Shaping or Reshaping of Complex 3D Parts Using Engineered Residual Stress https://www.esrd.com/resource-library/product/efficient-shaping-or-reshaping-of-complex-3d-parts-using-engineered-residual-stress/ Fri, 27 Mar 2020 21:55:22 +0000 https://esrd.com/?post_type=product&p=13452 Abstract: A model was developed for solving the inverse problem of distortion.
  • Significant improvement in overall shape of the validation part was observed.
    • Demonstrated good predictive performance for the inverse problem of reshaping.
  • The extreme distortion in a partially-peened state was predictable.
  • The difference between the predicted final shape and the actual final shape was less than the difference between the actual final shape and the target shape.
    • Demonstrated good predictive performance for the forward problem of reshaping.
  Originally presented at the Residual Stress Summit 2017 in Dayton, OH.]]>
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]]> Fatigue Life Modeling at CX and Interference Holes (from ERSI Workshop 2019) https://www.esrd.com/resource-library/product/fatigue-life-modeling-at-cx-and-interference-holes-from-ersi-workshop-2019/ Wed, 30 Oct 2019 16:28:30 +0000 https://esrd.com/?post_type=product&p=11988 Abstract: Continuation of previous year’s work by AP/ES and ESRD on crack closure. Additionally, a task evolved from USAF goals dictated at ERSI 2018 to study the residual stress redistribution at interference filled holes. The goal of this new task was to better understand interference fit fasteners and their interaction with residual stresses from cold-working (CX). Originally presented at the Engineered Residual Stress Implementation (ERSI) Workshop 2019 in Clearfield, UT.]]>
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]]> StressCheck Tutorial: Isotropic vs Kinematic Hardening for Cold Worked Holes https://www.esrd.com/resource-library/product/stresscheck-tutorial-isotropic-vs-kinematic-hardening-for-cold-worked-holes/ Sun, 22 Sep 2019 00:59:16 +0000 https://esrd.com/?post_type=product&p=11647 Abstract: Simulating reverse plasticity effects due to cold-working for isotropic (Beta = 0) and kinematic (Beta = 1) hardening, where Beta is is defined as the mixing coefficient between isotropic and kinematic hardening.]]>
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]]> Application Brief: Predictive Reshaping Using Surface Treatments https://www.esrd.com/resource-library/product/application-brief-predictive-reshaping-using-surface-treatments/ Tue, 13 Aug 2019 18:25:59 +0000 https://esrd.com/?post_type=product&p=11301 Read our application brief on the analytical capabilities in StressCheck Professional for predicting and correcting distortion problems due to surface treatments. Reliable predictive reshaping is possible for a variety of processes, resulting in increased part production capabilities and lower rejection rates of finished parts.]]>
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Application-Tech-Brief-Predictive-Reshaping.pdf - 2.72 MB ]]> 3D Crack Growth Simulation: Advancements & Applications Webinar Slides https://www.esrd.com/resource-library/product/3d-crack-growth-simulation-webinar-slides/ Mon, 22 Jul 2019 14:48:53 +0000 https://esrd.com/?post_type=product&p=11089 In this webinar we will detail the latest technological advancements for accurate simulation of three-dimensional metallic crack growth via coupled finite element analysis (FEA) and fatigue life computations. Additionally, we will examine why the development of more complex crack growth models requires both tighter control over numerical errors (i.e. solution verification) and rigorous benchmarking to standard handbook solutions and available experimental data (i.e. model validation). To view the webinar, click here.]]>
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]]> StressCheck Tutorial: Mapping Cold Working Residual Stresses to a Reamed Part via BRS Method https://www.esrd.com/resource-library/product/stresscheck-tutorial-mapping-cold-working-residual-stresses-to-reamed-part-via-brs-method/ Tue, 11 Dec 2018 21:43:15 +0000 https://esrd.com/?post_type=product&p=8615 Abstract: Mapping residual stresses generated by cold working to a reamed part via Bulk Residual Stress (BRS) mapping and loading methods. Using Solution Configurations + Parts and the StressCheck BRS Module to:
  • Solve a Cold Working (CX) analysis via Incremental theory of plasticity and Nonlinear Events
  • Map the post-CX residual stress distribution to the reamed part using BRS mapping
  • Apply the BRS-mapped stress distribution to the reamed part as a new load case
  • Solve for stress redistribution in the reamed part.
  For more details on the above methods: Helpful Hints and Tips: Cold Working and Reaming]]>
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]]> StressCheck Demo: 3D Cold Working Analysis https://www.esrd.com/resource-library/product/stresscheck-demo-3d-cold-working-analysis/ Mon, 10 Dec 2018 22:18:05 +0000 https://esrd.com/?post_type=product&p=8609 Abstract: A 3D Cold Working Analysis Demo video is presented for a stepped plate with a hole. Cold working (CX-mandrel insertion/removal) and overload/unload events are simulated. Residual stresses for pre- and post-CX events are extracted and visualized.]]>

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]]> StressCheck Tutorial: 2D vs 3D Cold Working Analysis of a Close Edge Distance Hole https://www.esrd.com/resource-library/product/stresscheck-tutorial-2d-vs-3d-cold-working-analysis-of-close-edge-distance-hole/ Fri, 07 Dec 2018 21:47:17 +0000 https://esrd.com/?post_type=product&p=8587 Abstract: Modeling of a 3"x5" titanium strip with a 0.45" diameter hole at a short edge distance (ED=1.5*D) from the right edge of the strip. The titanium's elastic-plastic material is described by a Ramberg-Osgood curve with pure isotropic hardening (i.e.  (beta=0). The mandrel insertion/removal nonlinear event is simulated by normal springs + spring displacements. Planar (plane stress) and 3D (Extrude reference) models are solved via Incremental plasticity theory and residual stresses are studied.]]>
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]]> StressCheck Tutorial: Checking ITP Viability for Solving Nonlinear Events https://www.esrd.com/resource-library/product/stresscheck-tutorial-checking-ipt-viability-for-solving-nonlinear-events/ Sun, 18 Nov 2018 19:10:42 +0000 https://esrd.com/?post_type=product&p=8384 Abstract: Case study for the checklist to determine the viability of performing Incremental theory of plasticity (ITP). Overload, unload, re-load and unload events studied for a U-shaped member under "pull apart" loads. Results between Deformation theory of plasticity (DPT), General nonlinear (geometric nonlinear + DPT) and IPT solutions for the initial overload event are compared.]]>
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