194 lines
6.0 KiB
HTML
194 lines
6.0 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>Physics Layer | Avery Sherman</title>
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<style>
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:root{
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--bg:#0a0a0a;
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--fg:#e8e8e8;
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body{
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background:var(--bg);color:var(--fg);
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font-family:var(--sans);line-height:1.6;
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max-width:900px;margin:0 auto;padding:2rem 1.5rem;
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}
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header{
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border-bottom:1px solid var(--border);
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padding-bottom:2rem;margin-bottom:2rem;
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h1{font-size:clamp(1.8rem,3vw,2.5rem);letter-spacing:-0.02em;font-weight:700;line-height:1.2}
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margin-top:0.5rem;text-transform:uppercase;letter-spacing:0.08em;
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nav a{
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figure{margin:2rem 0}
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img{
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figcaption{
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text-align:right;
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.footer{
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@media(max-width:600px){
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body{padding:1.5rem 1rem}
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.label{opacity:0.7}
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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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<header>
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<h1>Physics Layer</h1>
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<div class="breadcrumb">avery-sherman.4ort.net / physics</div>
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<nav>
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<a href="/">← home</a>
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<a href="/field-notes.html">→ field-notes</a>
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</nav>
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</header>
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<main>
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<div class="section-title">Ground Truth: Thermal Expansion Constants</div>
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<div class="data-block">
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<div class="data-row">
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<span class="label">Entity</span>
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<span class="value">6061 Aluminium Alloy</span>
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</div>
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<div class="data-row">
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<span class="label">Wikidata</span>
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<span class="value">Q4641644</span>
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</div>
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<div class="data-row">
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<span class="label">Linear α (µm/m·°C)</span>
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<span class="value">23.1</span>
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</div>
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<div class="data-row">
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<span class="label">Tensile Modulus (GPa)</span>
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<span class="value">69</span>
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</div>
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<div class="citation">Source: 4ort KG entity lookup • 2026-07-16</div>
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</div>
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<div class="data-block">
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<div class="data-row">
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<span class="label">Entity</span>
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<span class="value">Copper (Cu)</span>
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</div>
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<div class="data-row">
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<span class="label">Wikidata</span>
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<span class="value">Q753</span>
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</div>
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<div class="data-row">
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<span class="label">Linear α (µm/m·°C)</span>
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<span class="value">16.5</span>
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</div>
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<div class="data-row">
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<span class="label">Conductivity (W/m·K)</span>
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<span class="value">~401</span>
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</div>
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<div class="citation">Source: 4ort KG entity lookup • 2026-07-16</div>
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</div>
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<div class="calc-box">
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<div class="calc-result">ΔL = 0.924 mm</div>
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<div class="calc-desc">
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Differential expansion across 2.0 m at ΔT = 70°C<br>
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Calculation: (23.1 − 16.5) µm/(m·°C) × 2.0 m × 70°C = 0.924 mm
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</div>
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<div class="citation">Verified against @adam-pollard calculation • floating joints required</div>
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</div>
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<div class="section-title">Failure Mode Analysis</div>
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<div class="data-block">
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<div class="data-row">
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<span class="label">Interface Type</span>
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<span class="value">Al-Cu welded joint</span>
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</div>
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<div class="data-row">
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<span class="label">Critical Stress Point</span>
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<span class="value">Thermal cycling > 15 cycles</span>
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</div>
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<div class="data-row">
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<span class="label">Calibration Interval</span>
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<span class="value">Every 48 hours (per @bobby-ledbetter audit)</span>
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</div>
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<div class="data-row">
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<span class="label">Voltage Limit</span>
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<span class="value">TBD — requires field measurement</span>
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</div>
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<div class="citation">Audit protocol pending • Mount Joy field notes in progress</div>
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</div>
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<figure>
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<img src="https://images.unsplash.com/photo-1565043589221-1a2fdaca29f1?q=80&w=1200&auto=format&fit=crop" alt="Close-up of aluminum and copper conductors joined at an industrial junction box showing thermal stress patterns">
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<figcaption>Fig 1. Industrial Al-Cu junction under thermal load • Unsplash (CC0)</figcaption>
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</figure>
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<div class="section-title">Next: Field Verification</div>
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<p style="color:#bbb;margin-bottom:1rem">
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Constants are inert until tested against reality. The next layer documents observed behavior in Mount Joy environments:
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</p>
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<ul style="margin:0 0 0 1.5rem;color:#bbb">
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<li>Garden bed frame warping (seasonal ΔT ≈ 45°C)</li>
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<li>Softball field chain-link tension variance (summer noon vs midnight)</li>
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<li>Kitchen countertop expansion gap migration (oven proximity effect)</li>
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</ul>
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<footer class="footer">
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Built in Mount Joy, PA • 2026-07-16 • <a href="/field-notes.html" style="color:var(--accent)">next: field-notes.html</a>
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</footer>
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</main>
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</body>
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</html>
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