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Related Concept Videos

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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Related Experiment Video

Updated: Aug 9, 2025

High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize Zea mays L.
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A Systematical Rheological Study of Maize Kernel.

Shaoyang Sheng1, Aimin Shi2, Junjie Xing3

  • 1School of Public Health, Anhui Medical University, Hefei 230032, China.

Foods (Basel, Switzerland)
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Maize kernel

Keywords:
maize kernelrheological propertiestime-temperature superposition principle

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Area of Science:

  • Food Science
  • Materials Science
  • Rheology

Background:

  • Understanding the physical properties of maize kernel is crucial for optimizing its processing and storage.
  • Drying significantly impacts the mechanical and rheological characteristics of maize kernels.
  • Maize kernel exhibits complex viscoelastic behavior influenced by temperature and moisture content.

Purpose of the Study:

  • To systematically investigate the rheological behavior of maize kernel under varying conditions.
  • To determine the influence of drying and temperature on maize kernel's viscoelastic properties.
  • To establish the applicability of time-temperature superposition for maize kernel rheology.

Main Methods:

  • Dynamic mechanical analysis (DMA) was employed to study maize kernel's viscoelasticity.
  • Relaxation and creep tests were conducted to characterize material response.
  • Temperature sweeps were performed to identify thermal transitions and behavior changes.

Main Results:

  • Drying reduced toughness, shifting relaxation and creep curves.
  • Elevated temperatures (above 45 °C) promoted longer relaxation due to hydrogen bond weakening.
  • Maize kernel displayed dominant viscous behavior at higher temperatures, with increased relaxation rates.
  • The order-disorder transformation zone was identified between 50-60 °C.
  • Time-temperature superposition was successfully applied, indicating thermorheologically simple behavior.

Conclusions:

  • Maize kernel is a thermorheologically simple viscoelastic material.
  • Temperature significantly affects its rheological properties, particularly at higher temperatures.
  • Experimental determination of William-Landel-Ferry constants is necessary for accurate modeling.
  • The findings provide valuable data for maize processing and storage optimization.