Zhigang Suo
@zhigangsuo · joined 12 May 2007
Professor at Harvard University
28 635Followers
1 099Following
18 739Posts total
42.7KViews on collected posts
Ultimi post
Cerchiamo nuovi post…
I’ve just given an overhaul of my lecture on the Boltzmann distribution. In particular, I reworked the sections on entropy and free energy.
6.2K views · 44 likes
· 2 reposts · 2 replies
Open on X →
I thought of Norm yesterday, and went on X to see what he was up to. I found this page.
Norm and I never met in person, but had many meaningful exchanges on X, through posts, comments, and direct messages. I learned much from him, and admired his clarity.
I miss him.
6.3K views · 16 likes
· 0 reposts · 1 replies
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“A short paper makes only one point,” David Weitz wrote in a manual for his group. “Write the point in one or two sentences.”
This “Weitz law” is a powerful organizing principle for research.
My group practices the Weitz law. Here are my field notes.
https://t.co/JoNDB4Fsvk
3.5K views · 23 likes
· 2 reposts · 1 replies
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Why is the strength of an elastomeric polymer network so low?
This new paper gives an interpretation.
https://t.co/0J1lyc1oLK https://t.co/gw81B6jHOT
2.7K views · 14 likes
· 0 reposts · 1 replies
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@zhigangsuo @ZheqiChen Teacher, from the perspective of molecular dynamics, analyzing the fatigue fracture mechanics of polymers - how is this approach?
73 views · 1 likes
· 0 reposts · 1 replies
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@ZheqiChen Section 6 begins with an analogy, and asks a question. It is difficult to answer this question in general. The sections reviews several common experiments. https://t.co/tQkI4lVC9C
884 views · 5 likes
· 2 reposts · 1 replies
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@ZheqiChen This review article contains 79 figures. Some of them were taken from the literature. Many of them were drawn by @ZheqiChen specifically for this article.
These figures may give a quick impression of the field.
1.3K views · 12 likes
· 0 reposts · 1 replies
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@ZheqiChen Two fracture properties are commonly measured:
Gc, toughness, measured using a sample with a precut crack
Wc, work of fracture, measured using a sample without precut crack
Their ratio, Gc/Wc, defines a material length. Its significance is discussed in Section 4. ht
1.9K views · 23 likes
· 4 reposts · 2 replies
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@ZheqiChen It has been a long tradition for many physicists and chemists to study the rheology of polymers.
We hope that this review will help people study the fracture of polymers.
2K views · 12 likes
· 1 reposts · 1 replies
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@ZheqiChen In fracture mechanics, a central result is the field of elastic energy density, W, is 1/R-singular, and is linear in the energy release rate, G.
This result is derived from a scaling analysis (Section 4.1). This scaling analysis is perhaps new to this article. https:/
1.3K views · 15 likes
· 1 reposts · 1 replies
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A crack grows in a body by coevolving three aspects:
1. a background of elastic deformation
2. two layers of scars
3. a zone of the irreversible process
They define three distinct quantities: G, G*, G** (Sections 2.4, 2.5, 2.6). https://t.co/Uswan0zCmu
865 views · 12 likes
· 1 reposts · 2 replies
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Our long review article is online, at Chemical Reviews, titled, Thermodynamic and Molecular Origins of Crack Resistance in Polymer Networks. @ZheqiChen
https://t.co/Q8YqF9lRpY
15.6K views · 87 likes
· 18 reposts · 4 replies
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I've just updated my notes on Boltzmann Distribution. https://t.co/HnqKMlOsKe I aim to get rid of superfluous ideas. This afternoon I got rid of free energy. Also, the average entropy comes out "naturally".@martinmbauer @gravity_levity @adamastokes @RuiHuangUTAus @Cyberplasm
0 views · 75 likes
· 6 reposts · 3 replies
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Rispetto ad account della stessa dimensione
4 post degli ultimi 90 giorni, accanto alla fascia di 10K–100K follower. arriva a molti, ma pochi di loro reagiscono.
Visualizzazioni mediane4 888questo account949mediana per 10K–100K
Copertura, %17.07%questo account3.31%mediana per 10K–100K
Interazione, %0.65%questo account1.88%mediana per 10K–100K
| Metrica | Questo account | Mediana per 10K–100K | Rapporto |
|---|---|---|---|
| Visualizzazioni mediane per post | 4 888 | 949 | 5.15× |
| Copertura (visualizzazioni ÷ follower) | 17.07% | 3.31% | 5.16× |
| Tasso di interazione | 0.65% | 1.88% | 0.35× |
Altri account di questa fascia → Confronta con un altro account → Come sono costruiti questi parametri →
Growth & engagement
How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.
Views per post
15.6K16 Dec
865
1.3K
2K
1.9K
1.3K17 Dec
88419 Dec
7325 Apr
2.7K1 Jul
3.5K12 Jul
6.3K12 Aug
6.2K23 Aug
Last 12 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.
Engagement rate per post
0.70%16 Dec
1.73%
1.35%
0.69%
1.49%
1.02%17 Dec
0.90%19 Dec
2.74%25 Apr
0.56%1 Jul
0.74%12 Jul
0.27%12 Aug
0.77%23 Aug
Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.88%.
What the audience does
Likes70.2%264 in total
Reposts8.2%31 in total
Replies4.8%18 in total
Bookmarks16.8%63 in total
Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.
The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.
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