#solidmechanics — Public Fediverse posts

Breaking a Dam to Save It

The concrete that makes up so much of our world is usually local in origin. To keep costs low, engineers use locally-sourced ingredients to make it. But not all ingredients perform the same.

In the decades since concrete’s widespread adoption, engineers have discovered that some components in the concrete are prone to chemical reactions that cause the concrete to expand over time. For big infrastructure projects like a mid-twentieth century dam, this sparks a conundrum: how can we deal with expanding concrete without losing out on years of the project’s planned lifetime?

To find out, see what Grady learned about the Tennessee Valley Authority’s clever method for relieving a dam’s stress. (Video and image credit: Practical Engineering)

Breaking a Dam to Save It

The concrete that makes up so much of our world is usually local in origin. To keep costs low, engineers use locally-sourced ingredients to make it. But not all ingredients perform the same.

In the decades since concrete’s widespread adoption, engineers have discovered that some components in the concrete are prone to chemical reactions that cause the concrete to expand over time. For big infrastructure projects like a mid-twentieth century dam, this sparks a conundrum: how can we deal with expanding concrete without losing out on years of the project’s planned lifetime?

To find out, see what Grady learned about the Tennessee Valley Authority’s clever method for relieving a dam’s stress. (Video and image credit: Practical Engineering)

Assistant Professor (Tenure Track) in Mechanical Engineering
The City College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/

#2Dmaterials #fluidmechanics #SmartManufacturing #SOlidMechanics #thermodynamics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/?fsp_sid=5443

Assistant Professor (Tenure Track) in Mechanical Engineering
The City College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/

#2Dmaterials #fluidmechanics #SmartManufacturing #SOlidMechanics #thermodynamics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/?fsp_sid=5443

Assistant Professor (Tenure Track) in Mechanical Engineering
The City College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/

#2Dmaterials #fluidmechanics #SmartManufacturing #SOlidMechanics #thermodynamics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/?fsp_sid=4778

Assistant Professor (Tenure Track) in Mechanical Engineering
The City College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/

#2Dmaterials #fluidmechanics #SmartManufacturing #SOlidMechanics #thermodynamics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-assistant-professor-tenure-track-in-mechanical-engineering/?fsp_sid=4778

Lecturer Position in Mechanical Engineering
The CIty College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-lecturer-position-in-mechanical-engineering/

#computeraideddesign #mechanicalengineering #SmartManufacturing #SOlidMechanics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-lecturer-position-in-mechanical-engineering/?fsp_sid=4162

Lecturer Position in Mechanical Engineering
The CIty College of New York

See the full job description on jobRxiv: https://jobrxiv.org/job/the-city-college-of-new-york-27778-lecturer-position-in-mechanical-engineering/

#computeraideddesign #mechanicalengineering #SmartManufacturing #SOlidMechanics #ScienceJobs #hiring #research
https://jobrxiv.org/job/the-city-college-of-new-york-27778-lecturer-position-in-mechanical-engineering/?fsp_sid=4162

These days glass screens travel with us everywhere, and they can take some big hits on the way. Manufacturers have made tougher glass, but they continue to look for ways to protect our screens. Recently, a study suggested that non-Newtonian fluids are well-suited to the task.

The team explored the physics of sandwiching a layer of fluid between a glass top layer and an LCD screen bottom layer, mimicking structures found in electronic devices. Through simulation, they searched for the fluid characteristics that would best minimize the forces felt by the solid layers during an impact. They found that shear-thinning fluids — fluids that, like paint or shampoo, get runnier when they’re deformed — provided the best protection. Having the impact energy go into reducing the local viscosity of the fluid stretches the length of time the impact affects the glass, which lowers the bending forces on it and helps avoid breakage. (Image credit: G. Rosenke; research credit: J. Richards et al.; via Physics World)

https://fyfluiddynamics.com/2024/05/saving-screens-with-shear-thinning-fluids/

#engineering #fluidDynamics #nonNewtonianFluids #numericalSimulation #physics #science #shearThinning #solidMechanics #viscosity