What’s on the Fatigue poster
A definition and 6 facts worth remembering.
Cyclic loading cracks a part far below yield, after a number of cycles set by the stress amplitude.
- Steel S-N curves flatten near a million cycles
- Aluminium has no true endurance limit
- Surface finish and size cut the limit hard
- Notches and holes start almost every crack
- Tensile mean stress shortens life sharply
- Miner's rule sums n ÷ N over the load blocks
- Steel endurance limit — roughly half the tensile strength
- High-cycle regime — above 10⁴ cycles
- Miner failure — sum of n ÷ N reaches 1
- A shaft at 1500 rpm sees a million cycles in about eleven hours.
Fatigue data scatters by a large factor. Educational reference; design to a fatigue code and test.
Questions about the Fatigue poster
- What’s on the Fatigue poster?
- A definition and 6 facts worth remembering. Cyclic loading cracks a part far below yield, after a number of cycles set by the stress amplitude. Steel S-N curves flatten near a million cycles; Aluminium has no true endurance limit; Surface finish and size cut the limit hard; Notches and holes start almost every crack; Tensile mean stress shortens life sharply; Miner's rule sums n ÷ N over the load blocks; Steel endurance limit — roughly half the tensile strength; High-cycle regime — above 10⁴ cycles; Miner failure — sum of n ÷ N reaches 1; A shaft at 1500 rpm sees a million cycles in about eleven hours.. Fatigue data scatters by a large factor. Educational reference; design to a fatigue code and test.
- Who is the Fatigue poster for?
- Fatigue belongs to the Mechanical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning mechanics of materials can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Fatigue poster?
- Any part that sees repeated load: shafts, springs, wings, weld toes. A wall chart earns its place by being glanceable from where the work is happening, so Fatigue belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with Fatigue?
- Axial Stress & Strain, Beam Bending Stress and Beam Deflection Cases sit alongside Fatigue in the Mechanical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Axial Stress & StrainBeam Bending StressBeam Deflection Cases
- Is the Fatigue poster free to download and print?
- Yes. Fatigue downloads as a free PDF with no account, no email and no watermark, like everything else in the Mechanical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Fatigue poster print at?
- Fatigue is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Fatigue loses nothing.Printing guide
Related posters
Charts that sit alongside Fatigue on the same wall.
Axial Stress & Strain
Mechanical Engineering
Beam Bending Stress
Mechanical Engineering
Beam Deflection Cases
Mechanical Engineering
Transverse Shear Stress
Mechanical Engineering
Elastic Constants
Mechanical Engineering
Euler Buckling
Mechanical Engineering
Mohr's Circle
Mechanical Engineering
Thin-Wall Pressure Vessels
Mechanical Engineering
Browse every Mechanical Engineering poster, or start from the full catalogue.