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Related Concept Videos

Plasticity00:58

Plasticity

3.1K
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
3.1K
Plasticizers01:31

Plasticizers

371
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
371
Plastic Behavior01:21

Plastic Behavior

580
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...
580
Plastic Deformations01:14

Plastic Deformations

453
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
453
Plastic Deformations01:19

Plastic Deformations

467
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
467
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

483
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
483

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Related Experiment Video

Updated: Feb 5, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
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Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

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Case of Missing Plastic: Foreign Body Bronchiectasis.

Saketh Palasamudram Shekar1, Pablo Bajarano2, Anas Hadeh1

  • 1Pulmonary and Critical Care, Cleveland Clinic Florida, Weston, USA.

Cureus
|September 18, 2018
PubMed
Summary
This summary is machine-generated.

Foreign body bronchiectasis is an uncommon cause of airway dilation. This case highlights the importance of considering foreign bodies in localized lung disease, even with negative initial investigations.

Keywords:
foreign bodynon cystic fibrosis bronchiectasissurgical pathology

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Area of Science:

  • Pulmonology
  • Thoracic Surgery
  • Pathology

Background:

  • Bronchiectasis involves abnormal airway dilation, impairing lung function.
  • Common causes in middle-aged adults include immunodeficiency, aspiration, and allergic bronchopulmonary aspergillosis (ABPA).
  • Obstructive foreign bodies are rare causes of localized bronchiectasis, often leading to delayed diagnosis.

Observation:

  • A patient presented with symptoms suggestive of bronchiectasis.
  • Initial investigations including chest imaging and bronchoscopy were non-diagnostic.
  • A retained foreign body was unexpectedly discovered during post-lobectomy pathological examination.

Findings:

  • The patient had a retained foreign body causing localized bronchiectasis.
  • No significant aspiration history was reported.
  • Diagnosis was confirmed only after surgical resection and pathological examination.

Implications:

  • Foreign body bronchiectasis should be considered in cases of focal lung disease, especially when initial diagnostic methods are inconclusive.
  • This emphasizes the need for thorough evaluation and consideration of unusual etiologies in bronchiectasis.
  • Early identification and removal of foreign bodies are crucial for effective management and prevention of complications.