The Material Performance Lab enables
the study of the endurance of engineering materials. The emphasis
is currently focused on the study of manufacturing-process influences
on fatigue and fracture and the inclusion of these influences in the
design process. To this end, the lab is equipped with the following:
- Mechanical Testing
- Three servo-hydraulic material testing machines.
These machines use state of the art digital control
hardware and WindowsNT-based software to apply repetitive
loading histories to test specimens. A large assortment
of high-accuracy extensometers are available to measure
specimen shape change with applied load.
- Instrumentation facilities allow the use of accelerometers
and strain gages to capture static and dynamic specimen
- Departmental computing facilities are used in conjunction
with this lab to simulate testing procedures using
non-linear finite element methods. Data from both
experiment and simulation are compared to gain insight
into failure processes.
- Residual Stress Measurement
- Relaxation residual stress measurements are carried
out using strain gage instrumentation in combination
with cutting. Material removal is perfomed using wire
EDM, available in Professor Yamazaki's IMS-Mechatronics
- Diffraction residual stress measurements are performed
using both x-ray and neutron beams. XRD can be performed
using a Scintag XDS2000 X-ray diffractometer located
in the ChEMS Department. ND can be carried out at
Los Alamos Neutron Science Center (LANSCE).
- Data Acquisition and Analysis
- PC-based hardware and software is available for
digital data acquisition using LabView, as well as
data reduction and analysis.
See Professor Hill's
for a list of current research projects