Crossing the Chasm Between ECAD and CAE Virginia Manor Road, Suite 290, Beltsville MD

Transcription

1 Crossing the Chasm Between ECAD and CAE 1

2 Who is DfR Solutions? The Industry Leader in Quality-Reliability-Durability of Electronics 50 Fastest Growing Companies in the Electronics Industry - Inc Magazine Best Design Verification Tool - Printed Circuit Design 2012 Global Technology Award Winner 2

3 What is the Goal and what are the Problems? Goal: Predict the reliability of circuit cards when subjected to various vibration and mechanical shock environments Real-World Testing Finite Element Analysis 3 Too expensive Too few data points Time-consuming Convert CAD 2D model to CAE 3D model (time-consuming) Assign material properties to elements (data management) Define conditions and tests (tedious, FEA expertise) Convert CAE results to reliability predictions (tedious, programming expertise, reliability expertise) Report Generation (time-consuming, tedious, error-prone)

4 How does Sherlock help? Convert ECAD 2D model to CAE 3D model Assign material properties to elements Imports displacement and strain results from FEA tool Generates reliability results for all parts using validated models Report Generation 4 Provides tools to define Life Cycle events (thermal, shock, vibe) Generates FEA conditions for each event Generates tests required for desired reliability results Convert CAE results to reliability predictions Determines properties and assigns to 3D objects Define conditions and tests Provides various tools to import data from ECAD files Generates 3D model for external CAE tools Custom report generator (100+ pages per card if desired) Export data sets or images for custom reporting

5 Bridging The Gap Electronic Design Files Life Cycle Conditions Pre-Processing Sherlock Design Analysis 3D Model / Analysis Steps FEA Analysis Parts Packages Materials Sherlock Data Store FEA Script FEA Tool Post-Processing Reliability Results Sherlock Failure Analysis 3D Model / Disp Results / Strain Results Model Mode 1: Manage FEA testing completely within Sherlock Mode 2: Export model from Sherlock for manual FEA testing Mode 3: Import FEA results into Sherlock for reliability analysis 5 Results

6 FEA Model Building Supports standard ECAD file formats ODB++, ODB XML, GenCAD, Eagle, BOMs, NetList, Pick&Place, etc. Resolves inconsistencies between design files 6 All extracted values are saved, "best" choice is used User can review all data and override as needed

7 Reduced Data Entry Automatically extracts data from EDA files whenever possible User need only confirm correctness Point-n-Click data editors Part Editor Package Chooser Laminate Chooser Sherlock Data Stores augment EDA data Packages Materials Laminates Part Database saves confirmed data Update Parts List from Database Update Database from Parts List 7

8 Sherlock Part Wizard Extracts part data from millions of decodable manufacturer part numbers Part Number Patterns 40+ patterns provided by DfR User-defined patterns Part Wizard 8 Electrical properties Ratings Package dimensions Point-n-Click editor No programming required Built-in test support

9 PCB Stackup Made Simple Stackup definition Laminate Chooser 400+ materials Computed PCB properties 9 Extracted from EDA files Defined or edited by user Copper layer percent Average density, CTE, E

10 Life Cycle Conditions All environmental conditions to be seen Profile Editors 10 Thermal, Vibration, Shock Can be shared across organization Discrete data points Composite waveforms Automatically converted to FEA loading

11 Simplified 3D Objects Mount Points (holes, standoffs, pads, pins) Test Points (static loads) Automatically defined by Sherlock from ECAD files Graphical editor to add / remove / edit Sub-Assemblies 11 Automatically defined by Sherlock from ECAD files Graphical editor to add / remove / edit Multiple PCBs in a single model Mezzanine or edge-connected Graphical orientation tools

12 FEA Support 3rd Party FEA Tools Calculix (public-domain) Abaqus (v3.1, 4Q13) Ansys (in development) Nastran (in development) Analysis Types Multiple Models Merged part and PCB elements share common nodes in a single mesh speeds up analysis, can be used to compare results across tools Bonded part and PCB elements are meshed independently and bonded together allows for more uniform meshes, requires additional constraints Geometric 12 Modal Response (natural freq) Static Load (ICT) Modal Dynamic (harmonic/random) Transient Dynamic (mech shock) Custom Analysis high-level objects in CAE that can be easily refined and used for manual testing

13 FEA Post-Processing Import FEA results from FEA tool 3D model used in the analysis Nodal displacement and strain values Generate reliability predictions Determine max displacement / strain seen by all solder joints Predict reliability based on validated package-specific models Assign score to all parts, PCBs and project based on safety-factor Generate life-prediction curve Generate results 13 combines all PCB and test results Exportable tabular results Exportable 2D results Exportable 3D results

14 FEA Post-Processing (cont'd) Report Generator Dozens of report elements 14 Not over until the paperwork is done Works with current or archived results Test descriptions Life Cycle definitions Analysis inputs Summary results Detailed results Top N problems PDF Output

15 Sherlock FEA Demonstration Shock Analysis of Single PCB Static Load Analysis performed by user using FEA tool Sherlock exports FEA model and conditions User defines test and performs analysis Sherlock imports FEA results and generates reliability results Static Load Analysis of Multi-PCB Assembly 15 Sherlock generates FEA model, conditions and test Sherlock controls all FEA processing Sherlock imports FEA results and generates reliability results User defines sub-assemblies in Sherlock Sherlock generates FEA model, conditions and test Sherlock controls all FEA processing Sherlock imports FEA results and generates reliability results

16 Questions? 16