Miner's Rule Damage Calculator
Cumulative fatigue damage from up to four load blocks.
Linear damage ignores sequence effects (high-low loading fails before D=1) — aerospace uses D = 0.5–0.7 as the real limit. Crude, 80 years old, still everywhere.
Formula
Miner's Rule Damage Calculator is a free miners rule for design engineers, metallurgists and QA inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Miner's Rule Damage Calculator
Cumulative fatigue damage from up to four load blocks. The calculation implements D = Σ nᵢ/N_fᵢ; failure at D = 1 (Palmgren (1924), Miner (1945)). Linear damage ignores sequence effects (high-low loading fails before D=1) — aerospace uses D = 0.5–0.7 as the real limit. Crude, 80 years old, still everywhere.
How to use Miner's Rule Damage Calculator
- 1Enter Block 1: applied cycles.
- 2Enter Block 1: life at that stress.
- 3Enter Block 2: applied cycles.
- 4Enter Block 2: life at that stress.
- 5Read Damage sum ΣD, Life fraction remaining instantly — no submit button needed.
Why use Miner's Rule Damage Calculator?
- ✓Implements the standard formula — D = Σ nᵢ/N_fᵢ; failure at D = 1
- ✓Reference cited on-page: Palmgren (1924), Miner (1945)
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Miner's Rule Damage Calculator use?+
It computes D = Σ nᵢ/N_fᵢ; failure at D = 1, per Palmgren (1924), Miner (1945). The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Linear damage ignores sequence effects (high-low loading fails before D=1) — aerospace uses D = 0.5–0.7 as the real limit. Crude, 80 years old, still everywhere.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Miner's Rule Damage Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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