Tag: Materials

When Grain Growth Models Don’t Grow Real Grains

Picture a bustling medieval city: houses of all shapes, roads interweaving unpredictably, and gates that won’t budge because of stubborn gatekeepers. That’s exactly what modeling mesoscale grain growth feels like—chaotic, unpredictable, and utterly maddening. Sure, we have tools like phase-field, Monte‑Carlo Potts, and cellular automata to simulate this thermal dance at the grain level. But each has quirks that make them fall short of mimicking real-world materials.

August 13, 2025 0

Dynamic Time Warping for Temperature Compensation Repository

Guided wave Structural Health Monitoring (SHM) systems are powerful tools for detecting damage in structures like aircraft fuselages, pipelines, and bridges. However, one major obstacle persists: temperature variation. Even small temperature changes can significantly distort guided wave signals, often leading to false positives or missed damage.

Enter Dynamic Time Warping (DTW) Temperature Compensation — a robust, data-driven algorithm developed by Alexander Douglass and Dr. Joel B. Harley that aligns guided wave signals distorted by temperature, improving the accuracy and reliability of damage detection without requiring physical models or manual calibration.

June 17, 2025 0

When Grains Go Rogue: Rethinking Microstructure Growth in Materials Science

New experiments challenge decades-old models of grain growth, revealing a more chaotic—and fascinating—reality.

In the world of materials science, grain growth has long been considered a well-understood process. The prevailing theory posits that, over time, the tiny crystalline grains within a metal or ceramic coalesce and grow, driven by the reduction of total grain boundary area—a process akin to soap bubbles merging to minimize surface tension. This phenomenon, often described by the mean curvature flow model, suggests a smooth, predictable evolution of microstructures.

May 16, 2025 2

Listening to the Plate: How Lamb Waves Quietly Reveal the Structure of Materials

Guided waves like Lamb modes are reshaping how we inspect, model, and understand solid materials — all by listening to vibrations within the structure itself.

If you’ve never heard of Lamb waves, you’re not alone. Though they’ve been known to physicists and engineers for over a century, they remain surprisingly underdiscussed outside specialized fields like non-destructive testing, ultrasonics, and solid mechanics. But behind the scenes, Lamb waves are playing a crucial role — helping us understand how materials behave, age, and break, all through the language of wave motion.

May 16, 2025 0

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