Thermo-mechanical evaluation and life time simulation of high power LED lamp boards
conference paper
This work deals with a precise 3-D modelling of several LED board technologies mainly focused on thermal, thermo-mechanical evaluation and life time prediction to compare their performances. Main role of each LED board is to transport heat from LED die to heat sink and keep the thermal stresses in all layers as low as possible. Thermal stress has been inspected for the widest temperature range that can affect the LED boards (-40 to +125°C). Additionally, thermal stress cycles that lead to the LED board failure due to thermal fatigue have been calculated. Simulations have been completed with ANSYS structural analysis where temperature dependent stress-strain material properties have been taken into account. The objective of the analysis is to optimize not only the thermal management by thermal simulation of LED boards, but also to find potential problems from mechanical fatigue point of view. © 2012 IEEE.
TNO Identifier
460791
ISBN
9781467315128
Article nr.
6191760
Source title
2012 13th International Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2012, 16 April 2012 through 18 April 2012, Cascais
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