Related Experiment Video
Updated: Jul 25, 2025

Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
On the Characteristics of Fatigue Fracture with Rapid Frequency Change
Mohammad A Amooie1, K P Lijesh1, Ali Mahmoudi1
1Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
Abstract:
The effect of sudden variations in working modes and fatigue behavior of CS 1018 is studied. A general model based on the framework of the fracture fatigue entropy (FFE) concept is developed to capture such changes. Fully reversed bending tests are performed on flat dog bone specimens with a series of variable frequency tests without turning the machine off to simulate fluctuating working conditions. The results are then post-processed and analyzed to assess how fatigue life changes when a component is subjected to sudden changes in multiple frequencies. It is demonstrated that regardless of the frequency changes, FFE remains constant and stays within a narrow band range, similar to that of a constant frequency.
More Related Videos
Related Concept Videos
Fatigue
Fatigue Strength of Concrete
Stress-Strain Diagram - Brittle Materials
Fractures: Bone Repair
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
Behavior of Concrete Under Compressive Load
As the concrete specimen fractures under...
Rapidly Varying Flow

