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Related Concept Videos

Creep in Concrete01:22

Creep in Concrete

1.1K
Creep refers to the time-dependent increase in strain under a sustained load, excluding other time-dependent deformations associated with shrinkage, swelling, and thermal expansion in concrete. The primary mechanism behind creep involves the loss of physically adsorbed water from the calcium silicate hydrate within the hydrated cement paste. This process is further exacerbated by concrete's non-linear stress-strain relationship, microcrack development in the interfacial transition zone, and...
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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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Factors Affecting Creep01:28

Factors Affecting Creep

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In normal-weight aggregate concrete, the hardened cement paste is the primary contributor to creep, whereas the aggregates, being stiffer than the cement paste, are more resilient to stress-induced deformation. The stiffness of the aggregates is defined by their modulus of elasticity, and the more voluminous they are in the concrete, the less it will creep.
Further, the water/cement ratio is critical, as a lower ratio increases concrete strength, thus reducing creep. The strength of the...
426
Effects of Creep01:25

Effects of Creep

406
Creep in concrete, the gradual deformation under prolonged stress, significantly impacts the integrity of structures. For reinforced concrete beams, it can be a vital design consideration, as it increases deflection, sometimes necessitating additional design measures. In columns, especially slender ones under eccentric loads, creep can cause buckling, compromising their stability. However, creep can be beneficial in indeterminate structures by mitigating stresses that arise from shrinkage,...
406
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

365
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Normal Strain under Axial Loading01:20

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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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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Compressive creep test rig for thermoplastic samples.

Seyyed Saeed Vaezzadeh1, Alireza Godsi Chafjiri2, Victoria Nguyen1

  • 1Lamar University, Department of Industrial and Systems Engineering, P.O. Box 10032, Beaumont, TX 77710, USA.

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|October 1, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a low-cost, easy-to-operate creep test rig for thermoplastics. The instrument facilitates long-term material performance research and engages students in materials science.

Keywords:
CreepEducationMaterials testingStudent projectThermoplasticsViscoelastic

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Polymer Science

Background:

  • Creep is a critical deformation behavior in thermoplastics under constant load, impacting long-term performance.
  • Accurate creep measurement is essential for predicting material durability but is often time-consuming.
  • Existing methods for creep analysis can be complex and costly.

Purpose of the Study:

  • To develop an accessible and affordable creep test rig for thermoplastic materials.
  • To provide an entry point for students into materials research and data acquisition.
  • To expand the capacity for generating compressive creep data in research settings.

Main Methods:

  • Construction of a creep test rig using readily available, off-the-shelf components.
  • Minimal machining required for assembly, ensuring ease of operation.
  • Designed for long-term data collection, allowing for collaborative student involvement.

Main Results:

  • The developed instrument offers a simple and low-cost solution for creep testing.
  • It enables students at various educational levels to participate in authentic materials research.
  • The rig expands the scientific community's ability to gather compressive creep data.

Conclusions:

  • The new creep test rig effectively bridges the gap between educational needs and research requirements.
  • It provides a practical tool for both academic and industrial research on thermoplastic creep.
  • The instrument's design supports collaborative research and student engagement in materials science.