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Updated: 22 hours 28 min ago

Dear Dr. Xu,

Tue, 2017-06-06 22:37

In reply to Seek your input on nano-indentation or basic mechanics of materials

Dear Dr. Xu,

I have worked on characterization of polymers by nanoindenation for a few years. Based on my experience in this field, I haven't seen any impact problem where nanoindentation has been applied. Nanoindentation is a quasistatic method, and studying high velocity impact/material damage problems could be beyond the scope of this method.

Thanks a lot for sharing your thoughts, Michael!

Tue, 2017-06-06 10:39

In reply to Dear Sung Hoon: One challenge

Thanks a lot for sharing your perspectives.
As many people are working on making hierarchical structures with multiple materials and/or with controlled organizations, hopelly it will allow us to develop more accurate physical models. 

Dear Sung Hoon: One challenge

Tue, 2017-06-06 08:23

In reply to Thank you very much for your informative and inspiring article.

Dear Sung Hoon: One challenge in this field is the development of more accurate physical models for mechanical testing. Unfortunately, most 3D-print technologies are limited to polymeric materials, and often single material constructs. As we know, biological materials are usually composed of complex hierarchical structures with architectural organization across several size scales < 100 microns (the typical resolution limit of many desktop 3D-printers). Many natural materials are also composite systems composed of mineralized subunits, but ceramic and composite 3D-printing is still in its infancy. Improvements in these areas will likely allow for the creation of more accurate biomimetic models for research in biomechanics, with better replication of hierarchical size scales and more complex ceramic/composite compositions.

Thank you very much for your informative and inspiring article.

Sat, 2017-06-03 10:45

In reply to 3D-printing biomimetic structures to reveal the mechanics of natural systems

Dear Michael,

Thank you very much for your informative and inspiring article.

May I ask your perspective about the current challenges of the field and promising future directions?

Thank you for your help.

Sung Hoon

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