Fretting Fatigue Performance of Laminated, Pin-loaded Carbon Fiber Reinforced Polymer Straps
Lead Research Organisation:
University of Edinburgh
Department Name: Sch of Engineering
Abstract
Carbon Fibre-Reinforced Polymers (CFRPs) are composite materials and can be expensive to
produce. Nevertheless, they are commonly used wherever high strength-to-weight ratio and rigidity
are required like aerospace [1], automotive and civil engineering and a rising number of other
applications. The use and the first applicable FRPs date back in 1967, where they were used as
roler blade mountings in helicopters by Bölkow (Bo 209 Monsun) in Germany. Since then their use was
extended in the sailing industry (rigging system) as well as the structural engineering (tower
cranes, elevators, etc.). Laminated CFRP tensile straps undergo high tensile fatigue loads and what
is worth further explore is their behaviour under such loads. These kind of straps were used in the
study conducted at Empa, Switzerland in order to examine the fretting fatigue behaviour of
pin-loaded straps [2]. This kind of research will have tremendous impact for CFRP tensile members
used as suspenders for bridges [3].
This research is mostly focused on pin-loaded straps [4], [5] and the outcome of their
investigation is the better understanding and further improvement of their fatigue performance and
behaviour. What is also expected is to determine the residual properties and the components that
characterize the fretting fatigue behaviour, such as temperature progress, wear behaviour and
displacement/time. The study is a combination of experiments and numerical analyses, as experiments
will be carried out and numerical analyses will verify them and backwards.
produce. Nevertheless, they are commonly used wherever high strength-to-weight ratio and rigidity
are required like aerospace [1], automotive and civil engineering and a rising number of other
applications. The use and the first applicable FRPs date back in 1967, where they were used as
roler blade mountings in helicopters by Bölkow (Bo 209 Monsun) in Germany. Since then their use was
extended in the sailing industry (rigging system) as well as the structural engineering (tower
cranes, elevators, etc.). Laminated CFRP tensile straps undergo high tensile fatigue loads and what
is worth further explore is their behaviour under such loads. These kind of straps were used in the
study conducted at Empa, Switzerland in order to examine the fretting fatigue behaviour of
pin-loaded straps [2]. This kind of research will have tremendous impact for CFRP tensile members
used as suspenders for bridges [3].
This research is mostly focused on pin-loaded straps [4], [5] and the outcome of their
investigation is the better understanding and further improvement of their fatigue performance and
behaviour. What is also expected is to determine the residual properties and the components that
characterize the fretting fatigue behaviour, such as temperature progress, wear behaviour and
displacement/time. The study is a combination of experiments and numerical analyses, as experiments
will be carried out and numerical analyses will verify them and backwards.
Organisations
People |
ORCID iD |
| Luke Bisby (Primary Supervisor) | |
| Danijela Stankovic (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| EP/N509644/1 | 01/10/2016 | 30/09/2021 | |||
| 1943780 | Studentship | EP/N509644/1 | 01/11/2017 | 30/04/2021 | Danijela Stankovic |
| Description | It has been shown that carbon fibre straps can perform better than prestressed steel at elevated temperatures, but high temperature tests are still in progress in order to obtain the final results. |
| Exploitation Route | Design guidelines for cfrp straps that can be used in infrastructure applications. Choice of epoxy depending on the service temperature, i.e. room temperature, 100C, etc. |
| Sectors | Aerospace, Defence and Marine,Construction,Energy,Manufacturing, including Industrial Biotechology,Transport |
| Title | Abaqus |
| Description | A finite element software used to simulate the components used in the PhD |
| Type Of Technology | Software |
| Year Produced | 2017 |
| Impact | Able to observe critical regions, geometrical characteristics and overall performance of the components of the PhD |
| Description | SAMPE Conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Other audiences |
| Results and Impact | SAMPE Conference 2019 in Nantes on composite materials |
| Year(s) Of Engagement Activity | 2019 |
| Description | STEM fortnight civil engineering workshop |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Other audiences |
| Results and Impact | First a 10min talk about the different types of bridges, a briefing on the activity and what the workshop is all about; then split the pupils into small groups and provide them with the material they can use (cardboard, straws, tape, wooden sticks, etc) to build a small bridge of their own design that should be able to sustain the weight of two pens. |
| Year(s) Of Engagement Activity | 2020 |
| URL | https://www.ph.ed.ac.uk/news/2019/partnership-to-promote-stem-in-local-primary-school-leads-to-award... |
| Description | Summer School |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Other audiences |
| Results and Impact | The course is specifically designed for Ph.D. students, young researchers and industry engineers working in the field of composite materials, already in possess of a basic knowledge of the mechanics of composites. During the five-day program, senior researchers and industry representatives will provide lectures on experimental techniques for damage investigations, damage evolution under fatigue, analytical and numerical modeling of damage, structural health monitoring and examples of design against damage in advanced industrial applications.Certificates will be issued on the basis of participation to the course and the evaluation of the final assessment will entitle Ph.D. students to 5 ECTS. |
| Year(s) Of Engagement Activity | 2019 |
| URL | http://www.gest.unipd.it/damageschool2019 |
| Description | Tower Building |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Other audiences |
| Results and Impact | The Society for the Advancement of Material and Process Engineering and the EPSRC Future Composites Manufacturing Research Hub organized a "Design and Make" competition to manufacture a scaled composite tower. The rules for the tower competition were: The tower must be a standalone, self-supported structure; The tower must support a mass of 1kg at its highest point (dimensions of mass: 100 x 100 x 50 mm); The mass of the structure must be less than 250g; The tower must contain only glass fibre or carbon fibre and a suitable matrix material; Mechanical fasteners must not be used. Joints should be created by adhesive bonding or co-curing; The tallest structure wins. It was a great opportunity to put the composites experience into action and represent Edinburgh university in this national event. We had to use our knowledge and creativity to design a suitable structure for the prescribed load; the competition was designed to give us hands-on composites experience, including design for manufacture, material selection and manufacturing, as well as to create a dialogue and network with tomorrow's engineers. |
| Year(s) Of Engagement Activity | 2019 |
| URL | https://www.sampe.org.uk/assets/documents/YESDesignMake/SAMPEHubYESCompetition_2019.pdf |