====== 材料参数 ======
GENERAL:

http://www.matweb.com/

http://www.tc.faa.gov/its/worldpac/techrpt/ar-mmpds-01.pdf

http://femci.gsfc.nasa.gov/links.html

http://www.azom.com/

http://www.asme.org/index.html

http://www.intlmag.org/mechanical.aspx

http://www.mpif.org/

http://www.namtec.co.uk/metals/

http://www.steelynx.net/

http://www.machinedesign.com/ASP/enggMaterial.asp?catId=372

Fatigue:

http://femci.gsfc.nasa.gov/links.html

http://www.engineering-e.com/datamart/

http://www.ductile.org/didata/default.htm

Metalforming:

http://www.a-sp.org/database/publicationmain.asp

Plastics:

http://matdata.net/index.jsp

http://www.materialdatacenter.com/materialdatacenter/matdb/matdb.php

http://iwww.plasticsportal.com/products/products.html

http://www.geplastics.com/resins/techsolution/designguide.html

Vibro-Acoustics:

http://www.nvhmaterials.com/nvh/Materials/index.htm

http://www.saecollege.de/reference_material/pages/Coefficient%20Chart.htm

http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revmod.html#c4