@dpholmes

professor of theoretical and applied mechanics at Boston University, songwriter (@dougholmesmusic), surfer, father.

 Boston
bu.edu/moss
Joined May 2009
  • Tweets2.5K
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  • Followers1.6K
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In honor of Sophie Germain's birthday, take a minute to read about her contributions to elasticity: arxiv.org/abs/2303.13615
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I'm very excited to announce that I will join @cee_nwu @NorthwesternU as an Assistant Professor in January!
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Douglas Holmes retweeted
BU Experts
@BUexperts28 Mar 2024
"My students commented on how the bridge looked almost like a toy as it collapsed," says @BUCollegeofENG's @dpholmes, who discussed the #FrancisScottKeyBridge disaster with his students. He delves into their class discussion in the Q&A below ⬇️. @dougmost spr.ly/6006Z5W6M
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The opening of the the Devil’s Finger fungus looks analogous to some work we did with @LiquidsLab did a while back looking at bilayer bending from swelling vs capillary adhesion.
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We've been working for years to develop a general theory that describes how slender structures respond to non-mechanical stimuli (e.g. swelling; growth; electromagnetic fields). Today we are delighted to present our: "Stimuli-responsive shell theory" journals.sagepub.com/doi/10.…
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Natural stretch and natural curvature can be measured by considering how two orthogonal beams at each point stretch and bend. These are the "natural" quantities because beams are not constrained by geometry.
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To demonstrate the strength of this model, we use to predict the shapes of wavy leaves (sect. 7.1), the snapping of a Venus flytrap (sect. 7.2), and the voltage-induced buckling of dielectric elastomers. These predictions are made from simple experimental measures of strain.
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Reading a novel, I feel personally attacked: “Would you by any chance be familiar with certain notions concerning bifurcations in dissipative structures?” “I most certainly would not. In fact if I had to be I hope I’d kill myself.” - Denis Johnson (Already Dead)
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It's not everyday your favorite science writer writes about your work... thanks for the great article, @philipcball !
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I am definitely intrigued about Morpho!
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Douglas Holmes retweeted
Matter_CP@Matter_CP27 Apr 2023
James F. Gilchrist and Samuel R. Wilson-Whitford highlighted the work of Arman Guerra and Douglas P. Holmes about elastogranular sheets in #MatterIssue46! @dpholmes, @BostonUniversity Read more: bit.ly/3Vgj8Lp
Granular origami by James F. Gilchrist and Samuel R. Wilson-Whitford. Cell Press, Matter, cell.com/matter

ALT Granular origami by James F. Gilchrist and Samuel R. Wilson-Whitford. Cell Press, Matter, cell.com/matter

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#ImWithRivlin
Zhigang Suo@zhigangsuo15 Apr 2023
Students of mechanics might be intrigued by these unflattering remarks by Rivlin on Noll and Truesdell. wpage.unina.it/romano/a-revi…
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I'd like to include a lecture in my Structural Mechanics course on origami. These are 4th year MechE's. We will fold the miura and waterbomb base in class. Origami Twitter: What core ideas/concepts in origami should students at this level be introduced to?
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Check out Arman’s work studying how sticky grains warp elastic sheets!
Matter_CP@Matter_CP10 Apr 2023
Arman Guerra and Douglas P. Holmes investigate what happens when you put granular matter on elastic sheets in #MatterIssue46. @dpholmes Read more: bit.ly/3UdNDRH
Accessibility text: Elastogranular sheets by Arman Guerra and Douglas P. Holmes. Cell Press, Matter, cell.com/Matter

ALT Accessibility text: Elastogranular sheets by Arman Guerra and Douglas P. Holmes. Cell Press, Matter, cell.com/Matter

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A really nice perspective on our recent work studying granular matter on elastic sheets. Thanks @Gilchrist_Lab and @CranfordMATTER
James Gilchrist@Gilchrist_Lab5 Apr 2023
Replying to @Gilchrist_Lab
authors.elsevier.com/a/1gspg…
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Arman got curious about this problem by watching the way the gills on the underside of a mushroom clump together in waves.
Physics Magazine@PhysicsMagazine3 Apr 2023
Here is the video of the work, showing that as elastic beams become compressed, clumps (where beams press against one another) “annihilate” upon contact with holes (open spaces between beams). Lighter colors indicate regions of higher stored bending energy.
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Squeezing on a tight collection of elastic beams leads to a transition from disorder to order—eventually most of them buckle in the same direction. Story by @dangaristo. @OusmanKodio @dpholmes @MIT @BU_Tweets physics.aps.org/articles/v16…

How Order Emerges in Bendy Beam Bunches

The behavior of a collection of squeezed elastic beams is determined by geometry, not by complex forces.

physics.aps.org
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Check out the Focus by @PhysicsMagazine on our latest work! How Order Emerges in Bendy Beam Bunches physics.aps.org/articles/v16…

How Order Emerges in Bendy Beam Bunches

The behavior of a collection of squeezed elastic beams is determined by geometry, not by complex forces.

physics.aps.org
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