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Related Concept Videos

Fatigue01:21

Fatigue

995
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
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Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

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Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
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Residual Stresses in Bending01:18

Residual Stresses in Bending

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In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
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Plastic Behavior01:21

Plastic Behavior

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Strain-Energy Density01:20

Strain-Energy Density

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Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this region...
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Normal Strain under Axial Loading01:20

Normal Strain under Axial Loading

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Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
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A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
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Fatigue data for polyether ether ketone (PEEK) under fully-reversed cyclic loading.

Rakish Shrestha1, Jutima Simsiriwong2, Nima Shamsaei3

  • 1Department of Mechanical Engineering, Mississippi State University, Box 9552, Mississippi State, MS 39762, USA.

Data in Brief
|March 4, 2016
PubMed
Summary

This study presents fatigue test data for polyether ether ketone (PEEK), a versatile polymer. The findings detail PEEK

Keywords:
Cyclic deformationFatigueFrequency effectsPolyether ether ketoneStrain-life experimentsThermoplastic

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Area of Science:

  • Materials Science
  • Polymer Science
  • Mechanical Engineering

Background:

  • Polyether ether ketone (PEEK) is a high-performance semi-crystalline thermoplastic known for its excellent mechanical and thermal properties.
  • Understanding the fatigue behavior of PEEK is crucial for its application in demanding environments.
  • Fatigue failure can be influenced by various experimental conditions, including loading mode and frequency.

Purpose of the Study:

  • To present comprehensive data from uniaxial fully-reversed fatigue experiments on PEEK.
  • To categorize and detail experimental conditions and collected data for future analysis and modeling.
  • To provide a foundational dataset for researchers investigating PEEK's durability.

Main Methods:

  • Uniaxial fully-reversed fatigue tests were conducted on PEEK specimens.
  • Tests were performed in both strain-controlled and load-controlled modes.
  • Data collected include fatigue life, stress-strain responses, and hysteresis loops under varied loading conditions and frequencies.

Main Results:

  • Fatigue data were systematically categorized into four distinct test subsets based on control mode and loading strategy.
  • Detailed stress-strain and hysteresis responses were recorded for each fatigue cycle.
  • Experimental parameters such as frequency and temperature rise were monitored and adjusted.

Conclusions:

  • The presented dataset offers valuable insights into the fatigue performance of PEEK under diverse experimental conditions.
  • This comprehensive data facilitates further research into fatigue mechanisms and predictive modeling of PEEK.
  • The study establishes a robust foundation for understanding the long-term mechanical integrity of PEEK in engineering applications.