Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Elasticity in Concrete01:20

Elasticity in Concrete

121
Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
121
Stress-Strain Diagram - Brittle Materials01:24

Stress-Strain Diagram - Brittle Materials

2.7K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
2.7K
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

436
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
436
Residual Stresses in Bending01:18

Residual Stresses in Bending

218
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...
218

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Objects with three orthogonal symmetry planes: Oblique driving forces and Stokes flow motion.

PloS one·2026
Same author

Effect of preoperative embolization of spinal metastases on intraoperative blood loss.

Proceedings (Baylor University. Medical Center)·2026
Same author

Understanding Sports Injuries as Trauma: A Call to Action.

Substance use & misuse·2026
Same author

Clinical validation of a DNA methylation biomarker associated with overall survival of relapsed ovarian cancer patients.

International journal of cancer·2025
Same author

G-quadruplex structures regulate long-range transcriptional reprogramming to promote drug resistance in ovarian cancer cells.

Genome biology·2025
Same author

Development and Validation of a Stakeholder-Driven, Self-Contained Electronic Informed Consent Platform for Trio-Based Genomic Research Studies.

AJOB empirical bioethics·2025

Related Experiment Video

Updated: Aug 2, 2025

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

17.6K

Do bone elasticity and postmortem interval affect forensic fractographic analyses?

Jessica Skinner1, Natalie Langley1, Malin Joseph1

  • 1Mayo Clinic Arizona, Scottsdale, Arizona, USA.

Journal of Forensic Sciences
|April 14, 2023
PubMed
Summary
This summary is machine-generated.

Forensic fractographic features can identify crack propagation in bone for recent postmortem intervals (PMI) up to 40,600 accumulated degree hours (ADH). These features may not be sufficient alone to distinguish between perimortem and postmortem fractures.

Keywords:
accumulated degree hoursbone elasticitybone fracturesforensic anthropologyforensic fractographyperimortem traumapostmortem interval

More Related Videos

Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis
08:04

Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis

Published on: March 11, 2017

9.4K
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.1K

Related Experiment Videos

Last Updated: Aug 2, 2025

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

17.6K
Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis
08:04

Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis

Published on: March 11, 2017

9.4K
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.1K

Area of Science:

  • Forensic Science
  • Bioengineering
  • Materials Science

Background:

  • Forensic fractography analyzes bone fracture surfaces to understand injury mechanics.
  • Distinguishing perimortem (during life) from postmortem (after death) fractures is crucial in forensic investigations.
  • Bone properties change after death, potentially affecting fracture surface characteristics.

Purpose of the Study:

  • To determine if bone fractographic features, typically used for perimortem injuries, are also present in postmortem fractures.
  • To assess how changes in bone properties during the postmortem interval (PMI) influence these fractographic features.
  • To evaluate the reliability of fractographic features in differentiating peri- and postmortem bone fractures.

Main Methods:

  • Experimentally induced peri- and postmortem fractures in human femoral shafts.
  • Fracturing bones at various postmortem intervals (PMI) using a drop test frame and high-speed camera.
  • Recording vital statistics, PMI, environmental factors, bone properties (collagen, water loss), fracture energy, and fractographic features.

Main Results:

  • Fractographic features associated with perimortem fractures were observed up to 40,600 accumulated degree hours (ADH).
  • Hackle was consistently present in all fractures, irrespective of ADH.
  • Wake features and arrest ridges were variable; collagen percentage did not correlate with ADH, but water loss did.

Conclusions:

  • Forensic fractographic features reliably indicate crack initiation and propagation in experimentally induced postmortem intervals up to 40,600 ADH.
  • These findings demonstrate the method's utility in the early postmortem interval.
  • Reliable fractographic features throughout the early PMI suggest they may not be standalone indicators for distinguishing perimortem from postmortem fractures.