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Enhancing the perfo...
Enhancing the performance of bolted joints in composites by use of patched steel or titanium inserts
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- Akbarpour, Sahar (författare)
- KTH,Lättkonstruktioner
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- Hallström, Stefan, 1968- (författare)
- KTH,Lättkonstruktioner
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(creator_code:org_t)
- 2021
- Engelska.
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Serie: TRITA-SCI-RAP ; 2021:006
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- A new insert concept that interlaces metal inserts into composite laminates has earlier been shown to improve the relatively poor bearing strength of holes in fibre reinforced polymer composites, and it is here further and more thoroughly investigated. The concept was invented to increase the efficiency of joints with mechanical fasteners in composite materials and this work presents experiments on double bolt joints with inserts made of either stainless steel or a titanium (Ti) alloy. In particular the work compares different implementations of the insert concept by reinforcing one or two holes in double bolt joints, and the effect of using different metals in the inserts. Some complementary tests on pin-loaded specimens and open hole tensile specimens are also performed and compared, also with some results reported previously. Considerable improvements in the bearing load capacity, i.e. 50%-60% or 35%-45%, is attained. The open-hole tensile strength is also improved considerably (almost 30%) when the holes are reinforced with Ti inserts. The fact that the inserts can improve not only the bearing strength but also the performance in open-hole tension implies that the Ti inserts bring nothing but positive effects to the strength of the joints. The test results from single-shear double-bolt specimens with inserts at one hole showed improved strengths of 30% and 20% for specimens with steel and Ti inserts, respectively. Finally, an impressive strength improvement of 40-45% is achieved for single-shear double-bolt specimens having both holes reinforced with inserts of either steel or Ti.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Bolted joint
- Local reinforcement
- Metal insert
- Hybrid composite material
- Bearing strength
- Engineering Mechanics
- Teknisk mekanik
- Flyg- och rymdteknik
- Aerospace Engineering
- Fiber- och polymervetenskap
- Fibre and Polymer Science
- Hållfasthetslära
- Solid Mechanics
- Teknisk materialvetenskap
- Materials Science and Engineering
Publikations- och innehållstyp
- vet (ämneskategori)
- rap (ämneskategori)