Blue Jean tee shown back and front: the back has an orange steel S-N curve with an endurance limit and a dashed aluminum curve; the front has a small S-N curve on the left chest.

I Know My Limits Endurance Limit T-Shirt, S-N Curve Fatigue Engineer Tee, Funny Materials Engineering Gift

Comfort Colors 1717 / Blue Jean / S
$29.99
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Blue Jean tee shown back and front: the back has an orange steel S-N curve with an endurance limit and a dashed aluminum curve; the front has a small S-N curve on the left chest.
  • Blue Jean tee shown back and front: the back has an orange steel S-N curve with an endurance limit and a dashed aluminum curve; the front has a small S-N curve on the left chest.
  • Back of a blue jean Comfort Colors 1717 tee with the large I Know My Limits Endurance Limit print: an orange steel S-N curve with an endurance limit and a dashed aluminum curve.
  • Front of a blue jean Comfort Colors 1717 tee with a small S-N curve on the left chest.
  • Close-up of the I Know My Limits Endurance Limit artwork showing the endurance-limit knee, the dashed aluminum line and the rotating-beam specimen.
  • Blue Jean tee shown back and front: the back has an orange steel S-N curve with an endurance limit and a dashed aluminum curve; the front has a small S-N curve on the left chest.
  • Back of a blue jean Comfort Colors 1717 tee with the large I Know My Limits Endurance Limit print: an orange steel S-N curve with an endurance limit and a dashed aluminum curve.
  • Front of a blue jean Comfort Colors 1717 tee with a small S-N curve on the left chest.
  • Close-up of the I Know My Limits Endurance Limit artwork showing the endurance-limit knee, the dashed aluminum line and the rotating-beam specimen.
I Know My Limits Endurance Limit T-Shirt, S-N Curve Fatigue Engineer Tee, Funny Materials Engineering Gift

I Know My Limits Endurance Limit T-Shirt, S-N Curve Fatigue Engineer Tee, Funny Materials Engineering Gift

$29.99
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Steel has an endurance limit: below it, it can take load cycles forever. Aluminum doesn't, and eventually fails every time. An S-N fatigue curve with the knee near a million cycles, low-cycle, high-cycle and infinite-life regions, and a rotating-beam test specimen. Knowing when to say no.

What you get

  • Front: Left-chest S-N curve with an orange steel line and dashed aluminum line, "I Know My Limits"
  • Back: Large S-N fatigue curve: orange steel line flattening at the endurance limit Se near 10⁶ cycles, dashed aluminum line that keeps falling, region labels, a rotating-beam fatigue specimen and a drawing title block
  • Printed with premium DTF transfers and heat-pressed by hand in Charleston, SC

Choose your shirt

  • Comfort Colors 1717: heavyweight 6.1 oz garment-dyed cotton, relaxed fit (S–3XL)
  • Bella+Canvas 3001: lightweight 4.2 oz Airlume cotton, softer retail fit (S–3XL)

Colors may vary slightly by screen.

Care

Wash inside out in cold water, tumble dry low or hang dry, don't iron the print.

Production & disclosure

Designed by Elevated Designs LLC using digital design tools, with AI assistance. Printed and pressed to order in Charleston, SC.

Factor of Safety Co. · mechanical engineers — designed by Elevated Designs and printed to order in Charleston, SC.

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