Time Dependent Materials

There are many problems in modern engineering practice that require a detailed knowledge of how materials respond to loads over extended periods of time in a variety of applications and designs. Metals, as well as soils and concrete, exhibit creep behavior under certain conditions and this phenomenon has been traditionally incorporated into engineering education and practice.

During the past few decades, polymers and their composites have increasingly entered the domain of engineering design. These are the time-dependent materials par excellence. Their inroads into mechanical engineering practice has multiplied the need for deepening of our understanding of the role of time-dependence in materials behavior.

The Division intends to include in its purview also other time-dependent materials such as metals and ceramics at high temperatures, as well as wood and soils.

Time Dependent Materials Division - Updated May 2012

Meeting Minutes, June 14, 2011, Uncasville, CT

• Richard Hall welcomed attendees.
• Minutes of June 7, 2010 meeting were approved after realizing that initially the incorrect minutes were brought to the meeting, minutes were read from original notes that were also available.
• Discussion held regarding Session titles for 2012 conference.  Ideas included:
• Leave the same sessions
• Add session on interfaces
• Add session on evolution of experimental methods (driving experiments and modeling)
• Add session on small scale property evolution
• Add session on shape-memory properties of composites
• Etc.

• 2011 was the first year of having our own Track for TD Materials division (as opposed to years’ past when we had a TD symposium, Track being more formal and attracting more papers since tracks are advertised by SEM and also authors can return to the track year after year).  We briefly discussed whether we should change the track title.  It was stated that people expect Multi-functional to be in the TD Materials track.  We proposed keeping the same (as 2011) track title “Challenges in Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials” for 2012, Composite Materials TD will cosponsor the track, just as was done for 2011.  

• We returned to our discussion of session titles, with many ideas proposed.  We decided to assign organizers to the sessions as we proposed them:
•  “Bio Material testing at nano-scale” – we decided this was already covered in Bio TD
• “Time-dependent and small-scale effects in nanoscale testing” – Rick Hall suggested (Lu to organize)
• “Strain rate and frequency effects” – Bonnie Antoun and Alex Arzoumanidis
• “Viscoelastoplastic and Damage” – Jevan Furmanski
• “Environmental effects” – Rick Hall
• “Shape memory materials” – Jerry Qi
• “Time dependent materials – effect of grain boundaries, nanocrystalline materials” – Achuthan
• “Composites” – Tandon

• Richard Hall explained that we will keep the same TD office structure in place until next year’s meeting in Costa Mesa.  At the Cost Mesa TD meeting we will hold an election for a new secretary.
• Discussion about next year’s MDTM meeting (added: September 23 – 27, 2012) in Kanazawa, Japan.
• Question was posed if there were any complaints and/or issues that the TDM TD should raise with the SEM executive committee.  None were raised.
• Meeting was adjourned.

Attendees:

Bonnie Antoun             Sandia Nat’l Lab, Livermore, CA        brantou@sandia.gov

Hongbing Lu                Univ Texas, Dallas                            hongbing.lu@utdallas.edu

Y. Charles Lu              Univ of Kentucky                               chlu@engr.uky.edu

Rick Hall                     AFRL                                              richard.hall@wpafb.af.mil

Ajit Achuthan              Clarkson University                            aachutha@clarkson.edu

Takenobu Sakai          Tokyo Metropolitan Univ                      t-sakai@tmu.ac.jp

Satoshi Somiya          Keio University                                   somiya@mech.keio.ac.jp

Riu Xiao                      Johns Hopkins University                    rxiao4@jhu.edu

Tong Cui                     Univ of South Carolina                        cui3@email.sc.edu

Maen Alkhader            CalTech                                            maen@caltech.edu

Amber McClung          NRC/AFRL                                         amber.mcclung@wpafb.af.mil

Susan Hill                   UDRI                                                 susan.hill@udri.udayton.edu

Jevan Furmanski         LANL                                                 jevan@lanl.gov

Jean-Luc Bouvard        MSU                                                  jeanluc@cavs.msstate.edu

Alex Arzoumanidis      Psylotech                                          aarz@psylotech.com