Fatigue of metal-composite joints with penetrative reinforcement

P.N. Parkes, Richard Butler, D.P. Almond

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

An innovative, hybrid joining technology (HYPER) is investigated. Metal-composite single lap coupons, reinforced with additively manufactured metallic pins, are subjected to high-cycle fatigue. A backface strain technique is used to identify damage initiation/growth and an ultrasonic inspection method is also used to help characterise failure. Fatigue life curves are generated and it is found that there is a discrete change in failure mode when load severity is reduced. High severity testing results in pin fracture above the pin root - similar to that observed during a previous static test programme. However, for high-cycle fatigue, at low loads, pins are torn from the adherend and cracks propagate through the stock material below the pin microstructure. It is proposed that this results from a change to the pin load mixity as joint rotation increases. Coupon failure is controlled and repeatable (for a given load severity) due to the sacrificial role of the pins and there is no significant damage to the composite adherend. Hence, it is believed that HYPER joints not only have excellent mechanical strength, compared to benchmark tests with bonded joints, but also offer greater potential for in-service repair than conventional, mechanically fastened joints.
Original languageEnglish
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)9781624102233
DOIs
Publication statusPublished - Apr 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, USA United States
Duration: 8 Apr 201311 Apr 2013

Conference

Conference54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUSA United States
CityBoston, MA
Period8/04/1311/04/13

Fingerprint

Reinforcement
Fatigue of materials
Composite materials
Metals
Joining
Failure modes
Strength of materials
Repair
Inspection
Ultrasonics
Cracks
Microstructure
Testing

Cite this

Parkes, P. N., Butler, R., & Almond, D. P. (2013). Fatigue of metal-composite joints with penetrative reinforcement. In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2013-1879

Fatigue of metal-composite joints with penetrative reinforcement. / Parkes, P.N.; Butler, Richard; Almond, D.P.

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Parkes, PN, Butler, R & Almond, DP 2013, Fatigue of metal-composite joints with penetrative reinforcement. in 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics, 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Boston, MA, USA United States, 8/04/13. https://doi.org/10.2514/6.2013-1879
Parkes PN, Butler R, Almond DP. Fatigue of metal-composite joints with penetrative reinforcement. In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics. 2013 https://doi.org/10.2514/6.2013-1879
Parkes, P.N. ; Butler, Richard ; Almond, D.P. / Fatigue of metal-composite joints with penetrative reinforcement. 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics, 2013.
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