Counting on Grains of Sand
José E. Andrade, Professor of Civil and Mechanical Engineering; Executive Officer for Mechanical and Civil Engineering, and colleagues have developed a new method that measures the way forces move through granular materials—one that could improve our understanding of everything from how soils bear the weight of buildings to what stresses are at work deep below the surface of the earth. [Caltech story]
Professor Andrade Elected to Engineering Mechanics’ Board of Governors
José E. Andrade, Professor of Civil and Mechanical Engineering, has been elected as a member of the Board of Governors for the Engineering Mechanics Institute (EMI) of the American Society of Civil Engineers (ASCE) . The goal of the EMI is to stimulate and support mechanics-related activities by enabling new technologies, developing rational and quantitative decision-making paradigms, advancing mechanics as a science, and playing key roles in the education of university students and practicing engineers.
Compaction Bands in Sandstone are Permeable
José E. Andrade, Associate Professor of Civil and Mechanical Engineering, and colleagues have analyzed X-ray images of Aztec sandstone and revealed that compaction bands are actually more permeable than earlier models indicated. Their paper provides the first permeability calculations based on actual rock samples taken directly from the field in the Valley of Fire, Nevada. They conclude that these formations are not as impermeable as previously believed, and that therefore their ability to trap fluids—like oil, gas, and CO2—should be measured based on 3D images taken from the field. [Caltech Press Release]