Parts Archives - ESRD

StressCheck Tutorial: New Assembly Meshing/Auto Contact Features in StressCheck v12.0

brent — Wed, 11 Sep 2024 20:11:43 +0000

A new and powerful assembly automeshing/automatic contact detection feature is now available with the release of StressCheck v12.0. Before automeshing an assembly of close-contacting solid bodies, users may enable the "Assembly Meshing" option to enforce element face matching between neighboring surfaces (to within a user-specified tolerance). Once the solid bodies have been automeshed, StressCheck will automatically create contact zones between matched neighboring element faces and assign contact pairs via the new Auto Contact constraint method to the current constraint ID (if existing, otherwise StressCheck will use "AUTO_CONT" as the constraint ID). Individual contact pairs generated via the Auto Contact method may specified as Contact (the default, traditional multi-body contact), Fused (if element face matching was 100% successful, matched element faces are bonded) or Free (matched element faces are free). Note that if individual contact pairs are specified as Contact, and a parameter is not used for the Contact Constant, the Contact Constant value is computed from the assigned material property data and will be updated if one or more of the material properties are modified. This tutorial revisits a previous 3D multi-body contact example and utilizes assembly automeshing/automatic contact detection to significantly reduce the amount of setup time for multi-body contact analysis. The tutorial also demonstrates how refining the automesh (or updating a parameter value which triggers a re-mesh) will result in the re-generation of the contact zones/contact pairs.

StressCheck Tutorial: Improving Multi-Body Contact Efficiency and Quality via Hexa/Penta Boundary Layer Refinement

brent — Fri, 17 Mar 2023 15:41:01 +0000

Abstract: demonstration of how refining surfaces in contact with at least one hexa-dominant mesh layer (via the mixed Boundary Layer automesh method) improves the outcomes of multi-body contact solutions. The mixed Boundary Layer automesh method is available as of StressCheck v11.1. For more details, refer to MeshSim Automesh Generation Methods.

Webinar: Benefits of Mixed Meshing for Multi-Body Contact Applications

brent — Mon, 13 Mar 2023 20:42:18 +0000

[vc_row][vc_column width="1/2"][vc_message message_box_color="peacoc" icon_fontawesome="fa fa-lightbulb-o"]March 13, 2023 @ 1:00 pm EST[/vc_message][vc_column_text]Strategies for incorporating advanced mixed (hexa/penta) automeshing techniques for improved quality and efficiency of 3D multi-body contact applications will be explored.[/vc_column_text][vc_cta h2="" add_button="right" btn_title="WATCH NOW" btn_color="danger" btn_link="url:%23recording|||"]This webinar is now available to watch on-demand.[/vc_cta][/vc_column][vc_column width="1/2"] [caption id="attachment_27442" align="alignnone" width="1166"] 3D Splice Plate problem definition (top right), mixed mesh taking advantage of symmetry (top left) and plate von Mises stresses (bottom).[/caption] [/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

WEBINAR SUMMARY

[/vc_column_text][vc_custom_heading text="In this 3-part, pre-recorded 40-minute webinar we will present how the automeshing enhancements now available in StressCheck v11.1 significantly aid in the rapid generation of penta- and hexa-dominant meshes for use in 3D multi-body contact applications. To realize these concepts in a practical setting, a 3D splice joint assembly will be constructed, analyzed and post-processed, with detailed commentary on each step in the workflow process." font_container="tag:p|text_align:left" use_theme_fonts="yes"][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

WEBINAR HIGHLIGHTS

[/vc_column_text][vc_column_text]Part 1: Model Definition & Parametric Geometry Construction

Problem definition, scope and use of symmetry to reduce model size
Importation of a parameter file (.par)
Construction of 3D parametric solid bodies (boxes, cylinders, cones, etc.)
Boolean union/subtraction operations between 3D solid bodies to define 3D splice joint parts
Copy operations to duplicate child fastener bodies from a single parent fastener body
Body-to-body imprints between all parts for optimization of contacting surfaces

Part 2: Part Definition, Contact Zone Setup, Mixed Mesh Generation, Material Properties & Boundary Conditions

Creation of Parts for efficient bookkeeping and visualization
Generation of the solid mixed meshes for each Part via Global, Boundary Layer and Thin Section automesh methods
Creation of contact zones for Part regions expected to be in contact
Definition and assignment of material properties to each Part
Assignment of boundary conditions (loads and constraints) to each Part
Assignment of contact pairs to allow gap and pressure computations between Part contact zones

Part 3: Solution Setup, Execution and Post-Processing

Linear multi-body contact solution setup and initiating the solver
Evaluation of max contact pressure error, solve time and degrees of freedom solved (DOF)
Plotting the deformation of the 3D splice joint assembly
Plotting of von Mises stresses for each Part in the 3D splice joint assembly
Unaveraged vs. averaged von Mises stresses for each plate Part
Computing the stress resultants to ensure quality load transfer between Parts
Summary and wrap-up

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ASIP 2022 Training – Best Practices for the Modeling and Analysis of Bonded Doubler Repairs

brent — Mon, 05 Dec 2022 15:01:02 +0000

Abstract: this 2-hour training course, originally presented at the ASIP 2022 conference in Phoenix, AZ, explored the following topics:

StressCheck’s FEA technology implementation enabling modeling of very thin domains, including adhesive layers with 3D-solid elements.
Best practices and guidelines for modeling and analyzing 3D bonded repair doubler variations (e.g. racetrack/rectangular, circular/elliptical, tapered, metallic, ply-by-ply, homogenized, etc.) for circular cutouts and grindouts.
Performing “what if?” logic-driven studies of a digital 3D bonded repair handbook solution via StressCheck API-powered Engineering Simulation App, in which user-defined input data is passed from Python or Excel VBA to StressCheck Professional to perform scripted “on-the-fly” model adjustments and repair-oriented computations.

StressCheck Tutorial: Filled vs Open Hole SIF Comparison for 3D Offset Hole

brent — Tue, 16 Nov 2021 16:38:35 +0000

Abstract: comparison of 3D part-thru crack stress intensity factor (SIF) distributions for filled (pin-propped) vs open (bearing-loaded) offset holes. Simultaneous solution and extractions based on Parts and Solution Configurations.

StressCheck Tutorial: Multi-Body Contact Solver Options/Plot Functions

brent — Fri, 22 Jan 2021 16:30:44 +0000

Abstract: with the release of StressCheck v11, solver settings for models with active contact zones (Iteration Limit, Pressure Tolerance, Ray Tolerance) and functions for plotting contact pressure, initial gap and final gap are now available to provide more control and feedback for multi-body contact analyses.

Webinar: Introduction to Multi-Body Contact in StressCheck

brent — Tue, 23 Jun 2020 19:55:12 +0000

[vc_row][vc_column width="1/2"][vc_message message_box_color="peacoc" icon_fontawesome="fa fa-lightbulb-o"]June 23, 2020 @ 1:00 pm EST[/vc_message][vc_column_text]Strategies for modeling, solving & post-processing 3D multi-body contact applications in StressCheck Professional, along with implementation details & troubleshooting recommendations, will be explored.[/vc_column_text][vc_cta h2="" add_button="right" btn_title="WATCH NOW" btn_color="danger" btn_link="url:%23recording|||"]This webinar is now available to watch on-demand.[/vc_cta][/vc_column][vc_column width="1/2"][vc_single_image image="15252" img_size="full" alignment="center"][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

WEBINAR SUMMARY

[/vc_column_text][vc_custom_heading text="In this pre-recorded 2 hour webinar we will review the scope, typical applications, model setup, best practices, quality assurance checks, troubleshooting recommendations, and algorithmic details for StressCheck's multi-body contact implementation." font_container="tag:p|text_align:left" use_theme_fonts="yes"][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

WEBINAR HIGHLIGHTS

[/vc_column_text][vc_column_text]Introduction to Multi-Body Contact: Part 1

Overview of scope and supported problem classes
"How It Works"
Sample multi-body contact applications & use cases (e.g. fastened connections, fittings, splice joints, etc.)
Setting up a model for multi-body contact & checking solution quality
End-to-End (E2E) Demo: 3D Fork Fitting Analysis

Introduction to Multi-Body Contact: Part 2

Implementation details & FAQ's
Contact algorithm: theory & application
Recommendations & best practices
Troubleshooting common issues
ESRD Website Resources

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StressCheck Tutorial: Fitting + I-Beam Multi-Body Contact Analysis

brent — Wed, 22 Apr 2020 18:36:54 +0000

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StressCheck Tutorial: Incorporating Contact Pressure Bleed in Resultant Extractions

danielschneller — Wed, 15 Jan 2020 20:19:22 +0000

Abstract: The term "bleeding" means that the tractions associated with the contact pressures may not be zero out of the contact region on their way to zero traction. This can affect the calculation of stress resultants, and therefore the load transfer feedback. Selection only the element faces inside the contact zone, or the contact zone itself, may not be sufficient to represent the stress resultant associated with the contact pressure.

StressCheck Demo: Interference Fit Bushing + Loaded Pin Multi-Body Contact Analysis

brent — Mon, 21 Oct 2019 23:25:58 +0000

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