YU ZHOU

[YU ZHOU @YU___ZHOU]

Viscoelasticity is nearly independent of crosslink density. Slow crack growth has a threshold energy release rate, below which the crack doesn't grow. The threshold increases as crosslink density decreases. In contrast, fast crack growth is insensitive to crosslink density.

[YU ZHOU @YU___ZHOU]

Our paper is online. We study how crosslink density affects viscoelasticity and crack growth in tanglemers, polymer networks in which entanglements outnumber crosslinks. https://t.co/qzOBkEYMrL
@zhigangsuo @XianyangB

[Lihua Jin @lihuajin2014]

New in @pnas, we present systematic fracture studies on liquid crystal elastomers. We find cracks can change direction during propagation, driven dynamically by deformation-induced director rotation.
https://t.co/xRjH8bmpno

[YU ZHOU @YU___ZHOU]

@zhe_mination @zhigangsuo ~10000m! Thank you for bringing up the safety issue. From a mechanical perspective, will the tree buckle under its own weight? How does the tree withstand the wind or other external factors?

[YU ZHOU @YU___ZHOU]

@zhigangsuo @zhe_mination (I just saw the post.) It reminded me of experiences from middle school, when I used a siphon mechanism to take a shower...

[YU ZHOU @YU___ZHOU]

@zhigangsuo @zhe_mination Does that mean that once the water starts boiling, the water will break at the top? As I understand it, the formation of a vapor cavity at the very top of the tube doesn’t necessarily mean the water will break, as the water is still flowing.