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sound propagation simulation in abaqus challenge

Submitted by shabuK on
research

Dear friends,

           I am simulating sound propagation in mild steel.

frequency=5MHz mesh size=0.5mm

time incriment of wave amplitude=1e-9

instead of giving force at a node i have given boundry displacement

U1=5.8e-10

U2=-8e-10

instead of showing sound propagation, my entire specimen(mild steel with 15 mm thickness) deflecting like a wave.I would like to know 1)what is the reason for that deflection?

2)what may be the possible solution?

Asymmetric flexural behavior from bamboo’s functionally graded hierarchical structure: Underlying mechanisms

Submitted by Yang Lu on
research
biomechanics
nanomechanics
bamboo
cellular materials

As one of the most renewable resources on Earth, bamboo has recently attracted increasing interest for its promising applications in sustainable structural purposes. Its superior mechanical properties arising from the unique functionally-graded (FG) hierarchical structure also make bamboo an excellent candidate for bio-mimicking purposes in advanced material design. However, despite its well-documented, impressive mechanical characteristics, the intriguing asymmetry in flexural behavior of bamboo, alongside its underlying mechanisms, has not yet been fully understood.

Development of a Biofidelic Human Head Model from MRI data

Submitted by Simpleware on
research
finite element
simpleware
military
head

 

Traumatic brain injuries from head impact are a major issue across areas such as defence, automotive and sports, and can be costly to research using experimental testing. These injuries can be explored, though, through 3D models created from scan data and computer simulations.

Instability-driven vesicle growth in biological cells

Submitted by ashutosh.agrawal on
research
biophysics
cellular transport
instability

Journal: PNAS, published ahead of print, March 9 2015, doi:10.1073/pnas.1418491112

Title: Endocytic proteins drive vesicle growth via instability in high membrane tension environment

Authors: Nikhil Walani, Jennifer Torres, and Ashutosh Agrawal 

simulation of large rotations by laminated theory?

Submitted by r_n_s_s on
research

Hello iMechanica,

 

I am wondering if it is possible to perform the non-linear analyses (including large rotations) by laminated theories such as First order Shear Deformation Theory (FSDT) or higher orders and so on. Normally, those theories are valid for moderate rotations but: does anybody know if there is any modification to extend it for large rotations?

Thanks in advance for any advice!

 

Best

R_N_S_S

Mesh Update in ANSYS Workbench After Simulation

Submitted by PRITI YADAV on
research

Hello Everyone, 
I am using ANSYS Workbench (Static Structural). I need to update the coordinates of the nodes, after each simulation.The new coordinate conditionally depends on the stress tensor value of the previous simulation. If anyone have idea how can I solve this problem please help me out....

Thanks!

Ionic Cable

Submitted by _canhuiyang on
research
ionic conductors
transparent
stretchable
ionic cable

This paper demonstrates a new type of interconnects to fulfill the primary function of axons: transmitting electrical signals over long distances and at high speeds. The interconnect, which we call "ionic cable", uses ions to transmit signals, and is built entirely with soft, elastic materials-elastomers and gels. The ionic cable is highly transparent, and remains functioning after being stretched nearly eight times its original length. We describe the design, theory and experiment of the ionic cable.

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