Caterina Casavola

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

ESA Lab

caterina.casavola — Wed, 06 Feb 2019 09:31:08 +0000

ESA Lab caterina.casavola Wed, 02/06/2019 - 10:31

Lab full name

Laboratory of Experimental Stress Analysis

ERC 2nd Level Code

PE8 Products and Processes Engineering

ERC 3rd level Code

PE8_7 Mechanical and manufacturing engineering

PE8_4 Computational engineering

PE8_13 Industrial bioengineering

Research Activities

The research group working in the Experimental Stress Analysis laboratory, in the field of Experimental Mechanics, has developed wide experience for both in lab and in situ inspections, related to the stress/strain analysis on materials, components, structures in aeronautical and aerospace field, naval, biomedical, automotive, mechatronics.

Many techniques and applications have been developed to study Experimental data acquired from real components or stereolithographic model during working conditions:

STRAIN GAGE, BRAGG’S FIBER, WIFI sensors

PHOTOELASTICITY:

Trasmission photoelasticity (2D)
Photoelasticity coating technique: stress analysis of real components with birefringent coatings
Integrate photoelasticity: stress analysis of axialsymmetric components
Frozen stress photoelasticity: stress analysis of 3D models (rapid prototipe models, etc.)

OPTICAL METHODS (allow displacements and strain measurements on real components; accuracy: tens of nm; data analysis can be done in real time):

Moiré
Speckle
Holographic interferometry
Integrated Holo-Shearing system

Department

DMMM

Contact Person

Caterina Casavola

caterina.casavola@poliba.it

Companies and Institutions

Agusta

Sitael Aerospace

Bosch

Mer Mec

Centro Ricerche Fiat, Enginsoft

MBL Solutions – Inglass, etc.)

university and research centre (i.e. Univ. of Nottingham

Univ. of Manchester

University of Washington, Seattle

University of California, San Diego

Illinois Institute of Technology, Chicago

Institute of Micromechanics and Photonics, Warsaw University of Technology

Dep. de Ingeniería Mecánica, Univ. de Zaragoza

ublin City University

Trinity College

McGill University, Canada

ENEA

CALEF

CETMA

Centro Laser

Facilities

Loading machines and gripping systems for testing orthodontic devices and full-field measurement systems (eg Structured Light Projection, Digital Image Correlation) for the analysis of stress fields

SEM scanning electron microscope operating in a variable pressure regime for the analysis of biological samples

AFM atomic force microscope

Phase contrast microscope

facilities for the cultivation of cell lines and a chiller for their conservation down to -80 ° C.

Services

Development of research projects, consultancy, program contracts