Course:MTRL466-adhesivebonding/Group2/September 23

Project Name	Adhesive Bonding
Group	2
Current Meeting	September 23, 2011
Minutes Prepared By	Mandy Chen

Agenda

Kyle is leader.

We recieved Chad's comments on our summaries and will be editing and combining them by the end of the weekend.

Adhesive Bonding

• Met with Goran yesterday
  • Each epoxy has own cure kinetics
  • Just recieved cure kinetic formula we will use
  • Any adhesive experiment is very time consuming
  • Goran suggests a basic excel spreadsheet to model the kinetics
  • What fraction cured is enough for strength/stiffness of the joint?

Heat Transfer

• Focus on Fourier's second law?
• Types of ovens used in industry
• Read Chad's literature and lecture notes from Transport I

Recovery

• Difference between recovery and recrystallization - focus on only recovery
• Read Chad's literature

Precipitation Hardening

• Equation for precipitation hardening
• Short summary of theory of precipitation hardening

Future Plans

• Finalize mathematical models, list all needed parameters
• Finish background information by the end of the weekend
• Start preliminary codes
• Shauna will be gone next next Friday

Minutes

• Ask Ed about the Midterm report format
• Why is Aluminum?
  • Focus on economic, social, society point of view (CAFE?)

Curing Kinetics

• Goran suggest using excel

Time	Temperature	αold	dα/dt	αnew

• dα/dt=[(qbaseline-qin)/msample]/[Hr/(1-αo)]
• dα/dt= [kα^m(1-α)^n]/[1+e^c(α-αo+αct*T)]
• K=Ae^(-∆t/RT)
• Parameter of equation:~40-200 degrees Celsius
• Paint bake if ~160 (<250 degrees) so we are OK.
• Question: α- What values to look at? If we change the value of α will the value change?
• What is the upper limit of the adhesive-> constraint to reduce the parameter
• Max temperature for adhesive?
• Degree cure of adhesive? (Ask company?)
• Chad can contact GM and Novelis if we have specific questions
• Ask Goran what is the thickness of the epoxy and why. Ask Goran about the thermal properties of epoxy
• Use constant temperature for now

Heat Transfer

• Assume 1D transfer- no complicated shape
• Keep up below the Biot #
• Composite metal
• Need to determine temperature as a function of position
• Since its Al-epoxy-Al we can calculate the heat transfer for half of the system

Recovery

• Find parameters and conditions
• Excel

ACTION

• Everyone try to set up their models in Excel by next week