7/31/2019 Presentation-CombiningProENGINEER ProMECHANICA and Mathcad-Final

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Combining Pro/ENGINEER,

Pro/MECHANICA, and Mathcad toSolve Real World Problems

Stephen Seymour, P.E.Seymour Engineering & Consulting Group, LLC

www.seymourecg.com

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Presentation Outline

• Introduction

•

Problem description• Analysis methodology

• Pro/Engineer, Pro/Mechanica,

and MathCAD integration

• Results• Design optimization

• Conclusions

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Introduction

• Modern engineering and design problems require a

comprehensive approach in order to effectively and

efficiently achieve a solution

• Many design/engineering tasks are compartmentalized

• Pro/Engineer: CAD tool for model development

•Pro/Mechanica: Integrated FEA

• MathCAD: Engineering and scientific calculation

• All three software solutions can be combined within the

Pro/Engineer modeling environment

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Example Problem

• Goal: Determine the maximum

stresses and displacements of the

door/hinge assembly

• Door is nylon, hinges are 6061

aluminum

• Initial angular velocity of door is

known

• Forces due to impact are not known

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Analysis Methodology

• A force or acceleration is required for a

Pro/Mechanica static structural analysis

• Angular velocity is a load type and it is

known, but will only simulate centrifugal

loading. Will not simulate impact.

• Angular acceleration is a load type, but

the value is unknown and is dependent

on the structural response of the system

• How can the angular acceleration load

be determined?

Knowns/Unknowns

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Analysis Methodology

• One possible approach: Energy

Methods

• Let kinetic energy (KE) = strain

energy (SE)

• KE can be obtained from

Pro/Engineer and MathCAD

• SE can be obtained from

Pro/Mechanica

• We must determine the required

load so that KE = SE

Conceptual Solution

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Analysis Methodology

• Use Pro/Engineer to determine inertia

•

 Apply arbitrary acceleration load to determine the initialSE response

• Transfer inertia results and preliminary Mechanica results

to MathCAD to determine KE and the multiplication factor 

•Transfer multiplication factor from MathCAD toPro/Mechanica

• Run analysis where KE will equal SE 

Procedure

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Analysis Methodology

Pro/Engineer  MathCAD KE

Pro/Mech Arbitrary

SE

MathCAD Pro/Mech

Flow Chart

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Geometry

• Set material properties within

Pro/Engineer 

• Door to be nylon

• Hinges to be 6061 aluminum

• Set units

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Pro/Engineer MathCAD Integration

• Create model analysis feature to get

inertia properties

• Select coordinate system where y axis

passes through hinge axis

Inertia Properties

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Pro/Engineer Pro/Mechanica Integration

• Apply constraints

• Apply arbitrary angular acceleration

in LoadSet1

• Define analysis

Define 1st Mechanica Analysis

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Pro/Engineer Pro/Mechanica Integration

• Create Mechanica Analysis feature in

Pro/Engineer 

• Select the newly created analysis

• Pro/Engineer will automatically import

result parameters

Mechanica Results to Pro/Engineer

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MathCAD Worksheet

• Create worksheet defining KE equation

• Create input variables for Iyy and SE

from 1st Mechanica analysis

• Create output variables for 

multiplication factor, KE, and SE

•Tag input variables with proe2mc andoutput variables with mc2proe 

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Pro/Engineer MathCAD Integration

• Create MathCAD analysis feature

• Map the inertial parameter from ProE

to Iyy in MathCAD

• Map the SE from Mechanica analysis

feature to the MathCAD SE variable

Pass Variables to MathCAD

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MathCAD Pro/Mechanica Integration

• Create second analysis in Mechanica with

angular acceleration load in LoadSet2

• Create relations feature for Load2 value

• Create 2nd Mechanica Analysis feature

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Results

• Stress and displacement results

based on peak deceleration load

• Add annotation feature to

present and double check

results

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Parametric Analysis

• Subsequent design changes will automatically be

reanalyzed

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Design Optimization

• Due to parametric

relationship between the

FEA analysis and model,design optimization and

sensitivity studies can be

performed.

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Conclusion

• Pro/Engineer, Pro/Mechanica, and MathCAD

can all be linked via the feature tree

• Parametric associatively allows for automatic

updating

• Subsequent behavioral modeler optimization

features can be added to further automate

the design process

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