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Dear Friends,

The School of Engineering and Applied Science at the University of Pennsylvania is growing its faculty by 33% over the next five years. As part of this initiative, the Department of Mechanical Engineering and Applied Mechanics (MEAM) is engaged in an aggressive, multi-year hiring effort for multiple tenure-track positions at the Assistant, Associate, and Full Professor levels.

We present a monolithic mechanical metamaterial comprising a periodic arrangement of snapping units with tunable tensile behavior. Under tension, the metamaterial undergoes a large extension caused by sequential snap-through instabilities, and exhibits a pattern switch from an undeformed wavy-shape to a diamond configuration.

Call for Papers

2016 ASME Pressure Vessels and Piping Conference

Celebrating 50 Years of Service to the Pressure Vessels and Piping Industry

High-Pressure Technology Technical Program

July 17–21, 2016

Hyatt Regency Vancouver

Vancouver, BC, Canada

New Frontiers in Pressure Vessels and Piping

Hi all!

What is the relation between young's modulus and yield strength?

In the stress strain curves for our sample indicated  the Youngs modulus is above 400000 MPa. I think this is not ok, since the Youngs Modulus is a constant factor, which should always be at around 200000 MPa. However, the value of yield strength (0.5% EUL) meet the expected value of YS.

Please give advice about this matter? Is that related to error strain reading? Can we say that our YS already OK and neglecting the value of Young's Modulus that given by our Machine?

Dear all

Hi

Good day 

Hello all,

I am trying to model crack propagation in ABAQUS to simulate four point beam bending test. I am using 3D model. I am using XFEM for propagating the crack. I am not getting the required output parameters ( J-integral and SIF ), instead i am getting only PHILSM and PSILSM. I dont know how to extract the required parameters from these two values. For modelling a crack propagation, whether CZM is reliable or XFEM is reliable??. What are the disadvantages of CZM over XFEM( other than predefined crack path ). Any suggestions will be really helpful. Thanks in advance.

Dear All,

I got confused on the hyperelastic experiment that the uniaxial, equibiaxial, and planar test are based on the material is incompressible. What if the material is compressible, are the experiment the same as incompressible material? Except for the volumetric mode, what is the different between incompressible and compressible material experiment? Thanks!

Regards,

Bob