RS 2022 On the topology design of an innovative heterogeneous mechanical test for material mechanical characterization Centre for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro, Portugal Univ. Bretagne Sud, UMR CNRS 6027, IRDL, F-56100 Lorient, France Mafalda Gonçalves, Sandrine Thuillier, António Andrade-Campos Doctoral Program in Mechanical Engineering

1. On the topology design of an innovative
heterogeneous mechanical test for material
mechanical characterization
Centre for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro,
Portugal
Univ. Bretagne Sud, UMR CNRS 6027, IRDL, F-56100 Lorient, France
Mafalda Gonçalves, Sandrine Thuillier, António Andrade-Campos
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2
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2nd year
Doctoral Program in Mechanical Engineering

2. Research challenges
Industry
requirements
- Costs
- Time
- Material waste
Virtual
manufacturing
processes
Numerical
simulation
Accurate material
behavior
reproduction
Framework

3. Research challenges
Material characterization
Accurate material
behavior
reproduction
Experimental data
To provide information about the material behavior
Standard mechanical tests
Exhaustive testing task
Heterogeneous mechanical tests
It hasn’t been found yet a mechanical test that by its own is able to
characterize accurately a complex material behavior

4. Research methods
Test design methodology
Uniaxial tensile loading test
𝐅
Specimen geometry designed by topology optimization
▪ Find the optimal material distribution
▪ 35% of the total volume
Nonstandard test configuration
Heterogeneous mechanical fields
▪ High diversity of information about the material from a single test

5. Results
Test analysis

6. Next steps
Current state and impact
▪ Test validation
I’m here!
Journal paper
M. Gonçalves, A. Andrade-Campos, B. Barroqueiro, submitted.
Conference presentation
M. Gonçalves, A. Andrade-Campos, J.A. Dias-de-Oliveira, XVI International Conference on Computational
Plasticity, 7-9th September, Barcelona, Spain.
Conference paper
M. Gonçalves, S. Thuillier, A. Andrade-Campos, 25th International Conference on Material
Forming, ESAFORM 2022, 27-29th April, Braga, Portugal.
Conference paper
M. Gonçalves, S. Thuillier, A. Andrade-Campos, 41st International Deep Drawing Research
Group annual conference, IDDRG 2022, 7-9th June, Lorient, France.
1st year 2nd year 3rd year
▪ Study on optimal boundary conditions and designs for the test
▪ Introduction of nonlinearities in the design procedure
▪ Elastoplastic framework for the material behavior
▪ Real measurement errors in the design procedure

7. Concluding remarks
Mechanical test with
complex geometry
Efficient and accurate
material characterization
High diversity of information from
heterogenous mechanical fields

8. Thank you!
Any questions?
mafalda.goncalves@ua.pt
This project has received funding from the Research Fund for Coal and Steel under grant agreement No 888153. The authors also
acknowledge the financial support of the Portuguese Foundation for Science and Technology (FCT) under the project PTDC/EME-
APL/29713/2017 by UE/FEDER through the programs CENTRO 2020 and COMPETE 2020, and UID/EMS/00481/2013-FCT under
CENTRO-01-0145-FEDER-022083.
M. Gonçalves is grateful to the FCT for the Ph.D. grant Ref. UI/BD/151257/2021.
Acknowledgments
2nd year