PE8_1 Aerospace engineering

Residual stress (RS) develops during manufacturing processes as a result of heat and mechanical treatment experienced by the material. Welding process generates RS in welded parts and this could lead to some problems in terms of dimensional stability and structural integrity.
Under working condition, the RS combines with the stress field produced by external loads, changing the distribution of stress and influencing the structural stability and resistance to fatigue and fracture of the structure. The experimental evaluation of the RS (really difficult to predict) is very important for a proper design.
Complete equipment for RS measurement on real welded components are available. We are able to perform measurements on site.

Department

DMMM

Contact Person

Caterina Casavola

caterina.casavola@poliba.it

Facilities

X-Ray Diffractometer

Stereomicroscope

Thermal Imaging Camera

Services

development of research projects, consultancy, program contracts

Strain Gauge Testing Lab

bartolomeo.trentadue — Wed, 06 Feb 2019 08:26:14 +0000

Strain Gauge Testing Lab bartolomeo.trentadue Wed, 02/06/2019 - 09:26

Lab full name

Strain Gauge Testing Lab

ERC 2nd Level Code

PE8 Products and Processes Engineering

ERC 3rd level Code

PE8_1 Aerospace engineering

PE8_11 Sustainable design

Research Activities

Experimental stress analysis is based on the principle of strain measurement. Initially, bulky mechanical devices were used for measuring strain that displayed strain using a lever ratio of one thousand or more. These devices were the only type available for performing measurements so essential for stress analysis.
Normally, the strains determined with strain gauges are very small. The change in resistance is also minimal and direct measurement is not possible.
The strain gage must be included in a measurement system where accurate determination of the strain gage's change of resistance is possible.
The components include a strain gauge, which converts mechanical strain into a change in electrical resistance and a measuring circuit that is shown as the Wheatstone bridge having the strain gage as one arm.
Both the measuring circuit and the strain gauge are passive components. When the strain gage's resistance changes due to a strain, the bridge circuit loses its symmetry and loses its balance. A bridge output voltage is obtained which is proportional to the bridge's unbalance.
The measuring system includes an amplifier as the third component which amplifies the bridge output voltage to a level suitable for indicating instruments.
In some cases amplifiers are designed to give an output current proportional to the bridge output voltage, but some models can provide either voltage or current outputs. The fourth component in the measuring system is the display. Here the output signal of the amplifier is converted into a form which can be understood by the user.
We provide strain gauge testing of mechanical components and structures. Strain gauges are devices used to determine material strain due to static and dynamic loads coming from internal and external sources such as mechanical, thermal and pressure. During a given test, a gauge is attached to the specimen by an adhesive bond. As the specimen is deformed by loading, the foil within the gauge is deformed, which causes the electrical resistance to change. Measurement of the gauge electrical resistance is performed using a Wheatstone bridge circuit and a computerized data logger.
We can bond strain gauges to the test surface, perform data acquisition and provide test data to assist in identifying the stress, mechanical failure or fatigue to verify design, uncover weak points, and/or validate your FEA. We have the the experience to assist in increasing every component reliability.

Department

DMMM

Contact Person

Bartolomeo Trentadue

bartolomeo.trentadue@poliba.it

E&EM Lab

anna.lanzolla — Wed, 06 Feb 2019 08:09:26 +0000

E&EM Lab anna.lanzolla Wed, 02/06/2019 - 09:09

Lab full name

Electrical and Electronic Measurement Lab

ERC 2nd Level Code

PE7 Systems and Communication Engineering

PE8 Products and Processes Engineering

ERC 3rd level Code

PE7_7 Signal processing

PE7_3 Simulation engineering and modelling

PE8_1 Aerospace engineering

PE8_4 Computational engineering

Research Activities

Smart instruments for measurements on components and systems
Model identification, parameters estimation and characterization of electrical machines, equipment, apparatus and electrical drives
Development and characterization of components and sensors for the aerospace industry
Environmental monitoring and Remote Sensing

Department

DEI

Contact Person

Anna M. L. Lanzolla

anna.lanzolla@poliba.it

Technical Staff

Sergio De Gioia

sergio.degioia@poliba.it

Companies and Institutions

1. Leonardo SpA– Land & Naval Defence Division -Taranto

2. Autorità Portuale - Taranto

3. Arsenale Militare di Taranto

4. Alenia Aermacchi - Grottaglie (TA)

Projects

1. Progetto PON R&I 2014-2020 –“NSG: New Satellites Generation Components”, Area di specializzazione “Aerospazio”, 2018-2020

2. Progetto PON R&I 2014-2020 “CLOSE to the Earth ‐ CLOSE”, Area di specializzazione “Aerospazio

3. Progetto PON R&I 2014- “FURTHER - FUture Rivoluzionarie Tecnologie per velivoli più Elettrici” Area di specializzazione “Aerospazio, 2018-2020

4. Progetto PON R&I 2014-2020 “MITIGO- Sistemi integrati per la mitigazione del rischio idrogeologico e sismico di pendii, strutture e infrastrutture strategiche in contesti geomorfologici tipici dell’Italia Meridionale”, 2018-2020

Facilities

1. Basic measurement instruments (digital oscilloscopes, arbitrary waveform generators, power supplies, ADC boards)

2. Test benches for UAV characterization

3. SCADA/HMI Systems for industrial automation

4. metrology room with controlled temperature and humidity

Softwares

1. Mathworks MATLAB

2. National Instruments LabVIEW

Services

teaching,

Internship

prototyping