In situ strain investigation during laser welding using digital image correlation and finite-element-based numerical simulation

Agarwal, G.; Gao, H.; Amirthalingam, M.; Hermans, M.J.M.

doi:10.1080/13621718.2017.1344373

In situ strain investigation during laser welding using digital image correlation and finite-element-based numerical simulation

Title

In situ strain investigation during laser welding using digital image correlation and finite-element-based numerical simulation

Author

Agarwal, G. (TU Delft (OLD) MSE-5)
Gao, H. (TU Delft (OLD) MSE-5)
Amirthalingam, M. (Indian Institute of Technology Madras)
Hermans, M.J.M. (TU Delft (OLD) MSE-5)

Date

2018

Abstract

In situ strain evolution during laser welding has been measured by means of digital image correlation to assess the susceptibility of an advanced high strength automotive steel to solidification cracking. A novel method realised using auxiliary illumination and optical narrow bandpass filter allowed strain measurements as close as 1.5 mm from the fusion boundary with good spatial and temporal resolution. A finite-element thermomechanical model of the welding process supports the experimentally measured transverse strain. The validated finite-element numerical model can be used to assess the local strain and associated stress conditions which influences weldability and in particular, solidification cracking.

Subject

digital image correlation
FEM
In situ strain
laser welding
weld defects

To reference this document use:

http://resolver.tudelft.nl/uuid:1805e2d9-65fe-43d5-9b9b-ecee0a2df508

DOI

https://doi.org/10.1080/13621718.2017.1344373

ISSN

1362-1718

Source

Science and Technology of Welding and Joining, 23 (2), 134-139

Part of collection

Institutional Repository