1. Sherlock and Abaqus
October 16, 2014

2. The Industry Leader in Quality-Reliability-Durability
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

3. Works with Customers Throughout the Product Life Cycle
Applied Research
Simulation and Modeling
‘ilities’ (DfR, DfM, DfT, … DfX)
Supplier Audits
Qualification
Test Plan Development
Root-Cause Analysis
Tech Insertion
Design
Supply Chain
Test
Warranty

4. What is Sherlock
Sherlock is a CAE knowledge based program for Physics of Failure reliability and durability analysis on electronic equipment
Sherlock simplifies model creation and analysis
Eliminates the long, complicated, model creation process and the need for a PhD level expert in PoF, and FEA.
The “Knowledge Based” features optimized for electronic components and materials includes customizable, preloaded libraries of:
Component models, material properties, analysis wizards and environmental profiles for specific applications.
Designed to be used to quickly create and perform PoF based reliability/durability simulations. 4 4

5. Sherlock Process
Design Capture - provides the detailed inputs to the modeling software and calculation tools
Life-Cycle Characterization - define the reliability/durability objectives and expected environmental & usage conditions (Field or Test) under which the device is required to operate
Load Transformation - translates and distributes the environmental and operational loads across a circuit board to the individual parts
PoF Durability/Reliability Analysis & Risk Assessment - calculates life expectations, reliability distributions & prioritizes risks by applying PoF algorithms to the virtual PCBA model created in steps 1, 2 & 3 5 5

6. Sherlock

7. Design Capture Import PCBA Layout, Import BOM Parts List
Gerber, ODB++, and other CAD formats.
Import BOM Parts List
Correlated supplier component part # and industry/JEDEC package styles to auto link component to Sherlock’s libraries of component geometry and material properties to the individual parts locations mounted on the PCB to create the computer models for the life assessment.
Define PCB Laminate & Layers to Calculate Substrate Performance
Automated Abaqus model generation 7 7

8. Design Capture
Component locations from pick and place data

9. Design Capture
Drill holes

10. Design Capture

11. Design Capture Laminate Library
Defines 48 Categories Of Material Properties And Characteristics
For 319 Circuit Board Laminates Materials
From 20 Global Producers.
New Entries Can Be Added When New Laminate Materials Are Introduced to the Market.

12. Design Capture
Stackup information

13. Boundary Conditions
Sherlock has predefined boundary conditions that are typically used for printed circuit boards

14. Life Cycle
Reliability Goals
Phases
Stresses

15. Loading Multi-Axis shock and vibration Static Modal Dynamic
Force
Displacements
Modal Dynamic
Harmonic
Random
Transient Dynamic
Mechanical Shock

16. Loading Multi-Axis Shock and Vibration Loads
User can specify load direction and/or PCB orientation
User can specify uni-axial or tri-axial harmonic profiles 16 16

17. Abaqus Integration Mode 1: Sherlock manages all FEA processing
Electronic
Design Files
Life Cycle
Conditions
3D Model /
Analysis Steps
Pre-Processing
Sherlock
Design
Analysis
FEA
Tool
Abaqus
Model
Results
Script
Parts
Packages
Materials
Sherlock
Data Store
Reliability
Results
3D Model /
Disp Results /
Strain Results
Post-Processing
Sherlock
Failure
Analysis
Mode 1: Sherlock manages all FEA processing
Mode 2: Export model from Sherlock to Abaqus
Mode 3: Import Abaqus FEA results into Sherlock for reliability analysis 17 17

18. Mode 1 Transparent to the user
Sherlock forms the input deck for Abaqus and runs the simulation with the Abaqus solver
Sherlock automatically post processes the results and generates the reliability metrics

19. Mode 1
Sherlock generated results
Static displacement

20. Mode 1
Sherlock generated results
Random Vibration fatigue

21. Mode 2 Automatic Python script generated models for Abaqus CAE
Geometric based
All material properties assigned
Contact interactions formed
Boundary conditions
Analysis steps
Results need to be imported into Sherlock for reliability assessment

22. Mode 3 Model generated by Sherlock and modified and run in Abaqus CAE
Mechanical parts added, mesh changed, etc..

23. Mode 3

24. Mode 3

25. Mode 3
Power supply model, potting added and assessment of lead stresses using Abaqus

26. PCB Layer Modeling
Sherlock contains FEA tools to speed Abaqus model development
Two general techniques
Geometric layer modeling
Sherlock generates a Python script which converts the PCB plot layers into geometry
Mosaic technique
Sherlock generates an input deck with material properties assigned to the mesh

27. Script Based Material properties assigned to copper and resin areas
Best suited for generating detailed package models for investigating package CTE issues with Abaqus

28. Mosaic
Orphan mesh
Material properties computed for each element based on amount of copper and resin within the element

29. Mosaic
Multiple techniques available for PCB models

30. Multiple levels of interaction
Sherlock leverages the power of Abaqus to greatly speed up the mechanical and the reliability analysis of electronic assemblies
Multiple levels of interaction
Provides additional tools to develop detailed models
Models can be generated in minutes verses days
Material properties and interactions assigned

31. Questions?? Thank you! Nathan Blattau 1-301-640-5821