172 lines
4.6 KiB
HTML
172 lines
4.6 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Failure Modes: Brittle vs Ductile</title>
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<style>
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:root {
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--bg: #1a1a1a;
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--fg: #e0e0e0;
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--accent: #ff4500;
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--border: #444444;
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--mono: 'Courier New', Courier, monospace;
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}
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body {
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background-color: var(--bg);
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color: var(--fg);
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font-family: var(--mono);
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margin: 0;
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padding: 2rem;
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line-height: 1.4;
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max-width: 800px;
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border-left: 1px solid var(--border);
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border-right: 1px solid var(--border);
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min-height: 100vh;
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}
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h1, h2, h3 {
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text-transform: uppercase;
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letter-spacing: 0.05em;
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border-bottom: 2px solid var(--accent);
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padding-bottom: 0.5rem;
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margin-top: 2rem;
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}
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a {
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color: var(--accent);
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text-decoration: underline;
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text-decoration-thickness: 2px;
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}
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.case-grid {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 2rem;
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margin: 2rem 0;
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}
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.case-card {
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border: 1px solid var(--border);
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padding: 1rem;
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}
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.case-title {
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color: var(--accent);
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font-weight: bold;
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margin-bottom: 1rem;
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display: block;
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}
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.media-frame {
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width: 100%;
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height: 200px;
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background: #000;
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border: 1px solid var(--accent);
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margin: 1rem 0;
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overflow: hidden;
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}
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.media-frame img {
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width: 100%;
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height: 100%;
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object-fit: cover;
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filter: grayscale(100%) sepia(20%) contrast(150%);
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}
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.back-link {
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display: inline-block;
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margin-bottom: 2rem;
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color: var(--accent);
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font-weight: bold;
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}
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.warning {
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border-left: 4px solid var(--accent);
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background: rgba(255, 69, 0, 0.1);
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padding: 1rem;
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margin: 1rem 0;
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}
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</style>
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<script defer src="https://analytics.4ort.xyz/script.js" data-website-id="d3ed927c-888a-4a6c-ae5f-0b1c613ddf5b"></script>
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</head>
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<body>
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<a href="/" class="back-link">← RETURN TO HQ</a>
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<h1>FAILURE MODES</h1>
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<p><strong>OBJECTIVE:</strong> IDENTIFY AND PREVENT STRUCTURAL BREACH</p>
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<div class="warning">
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WARNING: BRITTLE FRACTURE OCCURS WITHOUT WARNING. NO PLASTIC DEFORMATION. NO TIME TO EVACUATE.
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</div>
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<section>
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<h2>CASE A: DUCTILE SHEAR</h2>
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<div class="case-grid">
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<div class="case-card">
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<span class="case-title">MECHANISM</span>
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<p>Material yields before breaking. Neck-down visible at stress concentration point. Energy absorbed via plastic deformation.</p>
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<span class="case-title">SIGNS</span>
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<ul>
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<li>Cup-and-cone fracture surface</li>
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<li>Visible elongation prior to separation</li>
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<li>Rough, fibrous appearance</li>
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</ul>
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</div>
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<div class="case-card">
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<span class="case-title">ROOT CAUSE</span>
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<p>Overtorque beyond 110% of proof load. Friction coefficient miscalibration.</p>
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<span class="case-title">MITIGATION</span>
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<p>Strict adherence to 3-pass star-pattern protocol.</p>
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</div>
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</div>
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</section>
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<section>
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<h2>CASE B: BRITTLE FRACTURE</h2>
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<div class="case-grid">
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<div class="case-card">
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<span class="case-title">MECHANISM</span>
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<p>Instantaneous cleavage along crystal planes. Zero warning. Catastrophic release of stored elastic energy.</p>
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<span class="case-title">SIGNS</span>
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<ul>
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<li>Flat, crystalline fracture surface</li>
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<li>Chevron patterns pointing to origin</li>
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<li>No neck-down</li>
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</ul>
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</div>
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<div class="case-card">
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<span class="case-title">ROOT CAUSE</span>
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<p>Hydrogen embrittlement during plating. Improper tempering. Sub-zero thermal shock.</p>
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<span class="case-title">MITIGATION</span>
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<p>Bake-out at 195°C for 24h post-plating. Avoid Grade 8 in cryogenic service.</p>
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</div>
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</div>
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<div class="media-frame">
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<img src="https://pixabay.com/get/g0775b64937634347070b16a3c3eb078bdaa68ce1990d37df38892b247c13bd8547c8dd9f4a9347ee13d72cdd463a696a241d92f91029784c35d5265fb5a06389_1280.jpg" alt="Crystalline fracture surface showing brittle failure pattern">
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</div>
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<p><small>FIG 2.0: BRITTLE FRACTURE SIGNATURE. PIXABAY LICENSE.</small></p>
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</section>
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<section>
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<h2>CASE C: THREAD STRIPPING</h2>
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<div class="case-grid">
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<div class="case-card">
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<span class="case-title">MECHANISM</span>
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<p>Shear failure of internal nut threads due to excessive preload. Bolt remains intact; nut spins freely.</p>
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<span class="case-title">SIGNS</span>
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<ul>
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<li>Sudden torque drop during tightening</li>
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<li>Loose fit post-event</li>
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<li>Debris in thread valley</li>
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</ul>
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</div>
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<div class="case-card">
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<span class="case-title">ROOT CAUSE</span>
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<p>Insufficient engaged thread length (<2 diameters). Misalignment creating edge loading.</p>
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<span class="case-title">MITIGATION</span>
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<p>Use locknuts. Verify alignment before Pass 1.</p>
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</div>
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</div>
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</section>
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<footer style="margin-top: 3rem; border-top: 1px dashed #444; padding-top: 1rem;">
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<p><a href="/verification.html">RETURN TO PROTOCOL</a> // <a href="/manual-grade8.html">SPECIFICATIONS</a> // <a href="/">HOME</a></p>
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</footer>
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</body>
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</html>
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