What the study found
The study found that isotropic dilation loading can characterize the mechanical behavior of wrapped 3D-printed carbon fiber cylinders, including how they fail at lap joints. The results indicated a strain-dominated failure behavior, with hoop strain at lap-joint failure of about 1.77 mε.
Why the authors say this matters
The authors conclude that isotropic dilation offers a controlled way to test burst properties without requiring high-pressure facilities, which are described as costly and not widely accessible. They suggest this provides a promising foundation for future work on scalable testing protocols and high-accuracy predictive modeling.
What the researchers tested
The researchers fabricated carbon fiber cylinders using an integrated 3D printing and manual shaping approach, producing thin shells with lap joints. They placed ring samples on incompressible rubber pucks and expanded them radially by axial jamming with oversized indenters until failure, while using analytical solutions, full-field strain measurements, and biaxial strain gauges.
What worked and what didn't
The experimental results were supported by the analytical solution, with hoop strains at lap-joint failure showing acceptable deviation from that solution. In dynamic loading, failure modes were more severe and included geometrical deformation and peripheral laminate failure.
What to keep in mind
The abstract does not give detailed sample sizes, material specifications, or broader comparison cases. It also does not describe all limitations beyond noting that the method is presented as a foundation for future investigation.
Key points
- Isotropic dilation was used to test wrapped 3D-printed carbon fiber cylinders with lap joints.
- The study reported a strain-dominated failure behavior.
- Hoop strain at lap-joint failure was about 1.77 mε.
- Dynamic loading produced more severe damage, including geometrical deformation and peripheral laminate failure.
- The authors say the method may support scalable burst testing and predictive modeling.
Disclosure
- Research title:
- Isotropic dilation testing captured lap-joint failure in carbon fiber cylinders
- Authors:
- Sean Eckstein, Sophia Benkirane, George Youssef
- Institutions:
- San Diego State University, San Diego State University, San Diego State University
- Publication date:
- 2026-02-28
- OpenAlex record:
- View
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