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# How to calculate absorbed energy in a material during impact?

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## How to calculate absorbed energy in a material during impact?

(OP)
Hi,
I have a hollow tube is being impacted by a block of 25 kg at 14 m/sec along its longitudinal axis.
I am using INT_ENERGYALL results option in ANSYS Explicit and I've selected the tube as my body.
The problem is: the calculated result is way too high - (1.13 e5 J/kg)~ 11515 J for the 0.108 kg tube - compared to the 0.5*m*v^2= 2450 J initial kinetic energy.
Any thoughts?

### RE: How to calculate absorbed energy in a material during impact?

Have you checked Energy Summary (under Solution Information) to see different energies
(internal, kinetic, hourglass, contact) during solution cycles? Are they making sense?

### RE: How to calculate absorbed energy in a material during impact?

The plot of INT_ENERGYALL is a distribution. If 1.13e5 is the maximum value in the legend, you cannot
simply multiply it by the total mass of tube to get total internal energy of the tube.

### RE: How to calculate absorbed energy in a material during impact?

(OP)
Energy summary make perfect sense.

How then to derive the absorbed energy from ANSYS?
Thanks

### RE: How to calculate absorbed energy in a material during impact?

Try using Result Tracker (also in Solution Information).

### RE: How to calculate absorbed energy in a material during impact?

(OP)
It worked thank you L K very much indeed.

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