Abstract
In this study, the objective was to measure the “out-of-plane” 2-3 shear strength of unidirectional composite, working within constraints in supplied material geometry. Unidirectional carbon/epoxy composite material was tested using a sandwich-type beam specimen under 3-point bending with a low span-to-thickness ratio to achieve failure under 2-3 shear. Specimens were carefully designed to deliberately cause shear failure near the midplane, avoiding other possible failure mechanisms. A photoelastic coating and post-mortem microscopy were used to verify failures. Results were compared with a simple analytical description of failure and found to have good agreement. Notably, this approach was able to accommodate the limitations of the supplied material (thin sheets) while still providing an accurate means of obtaining the F23 shear strength of the material. The results also imply the possibility of testing the transverse tensile strength (F2t) in lieu of performing a shear test, which is far simpler, and inferring the out-of-plane shear strength F23.
| Original language | English (US) |
|---|---|
| Title of host publication | Conference Proceedings of the Society for Experimental Mechanics Series |
| Publisher | Springer New York LLC |
| Pages | 77-84 |
| Number of pages | 8 |
| DOIs | |
| State | Published - Jan 1 2019 |
Publication series
| Name | Conference Proceedings of the Society for Experimental Mechanics Series |
|---|---|
| ISSN (Print) | 2191-5644 |
| ISSN (Electronic) | 2191-5652 |
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Keywords
- Composites
- Interlaminar
- Photoelasticity
- Shear strength
- Test methods
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Mechanical Engineering
Cite this
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Testing the 2-3 shear strength of unidirectional composite. / Fenner, Joel S.; Daniel, Isaac M.
Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York LLC, 2019. p. 77-84 (Conference Proceedings of the Society for Experimental Mechanics Series).Research output: Chapter in Book/Report/Conference proceeding › Chapter
TY - CHAP
T1 - Testing the 2-3 shear strength of unidirectional composite
AU - Fenner, Joel S.
AU - Daniel, Isaac M
PY - 2019/1/1
Y1 - 2019/1/1
N2 - In this study, the objective was to measure the “out-of-plane” 2-3 shear strength of unidirectional composite, working within constraints in supplied material geometry. Unidirectional carbon/epoxy composite material was tested using a sandwich-type beam specimen under 3-point bending with a low span-to-thickness ratio to achieve failure under 2-3 shear. Specimens were carefully designed to deliberately cause shear failure near the midplane, avoiding other possible failure mechanisms. A photoelastic coating and post-mortem microscopy were used to verify failures. Results were compared with a simple analytical description of failure and found to have good agreement. Notably, this approach was able to accommodate the limitations of the supplied material (thin sheets) while still providing an accurate means of obtaining the F23 shear strength of the material. The results also imply the possibility of testing the transverse tensile strength (F2t) in lieu of performing a shear test, which is far simpler, and inferring the out-of-plane shear strength F23.
AB - In this study, the objective was to measure the “out-of-plane” 2-3 shear strength of unidirectional composite, working within constraints in supplied material geometry. Unidirectional carbon/epoxy composite material was tested using a sandwich-type beam specimen under 3-point bending with a low span-to-thickness ratio to achieve failure under 2-3 shear. Specimens were carefully designed to deliberately cause shear failure near the midplane, avoiding other possible failure mechanisms. A photoelastic coating and post-mortem microscopy were used to verify failures. Results were compared with a simple analytical description of failure and found to have good agreement. Notably, this approach was able to accommodate the limitations of the supplied material (thin sheets) while still providing an accurate means of obtaining the F23 shear strength of the material. The results also imply the possibility of testing the transverse tensile strength (F2t) in lieu of performing a shear test, which is far simpler, and inferring the out-of-plane shear strength F23.
KW - Composites
KW - Interlaminar
KW - Photoelasticity
KW - Shear strength
KW - Test methods
UR - http://www.scopus.com/inward/record.url?scp=85055316623&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055316623&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-95510-0_9
DO - 10.1007/978-3-319-95510-0_9
M3 - Chapter
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 77
EP - 84
BT - Conference Proceedings of the Society for Experimental Mechanics Series
PB - Springer New York LLC
ER -