Navigation Links
Ironing out the causes of wrinkles
Date:7/15/2010

As a sign of aging or in a suit, wrinkles are almost never welcome, but two papers in the current issue of Physical Review Letters offer some perspective on what determines their size and shape in soft materials.

Jiangshui Huang and colleagues at the University of Massachusetts, Amherst explore how wrinkles in a sheet adapt to an edge that prefers to be flat. They float a thin, rectangular film of common plastic (polystyrene) on water and compress the sheet along one direction to make folds. In the middle of the film, competition between gravity (which prefers shallow, frequent ripples) and the energy cost of bending the film (which favors longer, higher folds) determine the height and frequency of the folds. Near the edge, however, surface tension forces the film to lie flat. Huang et al. show the film interpolates between these two limits by smoothly tapering from larger, undulating folds in the center to higher frequency ripples at the edge.

In a related paper, Douglas Holmes and Alfred Crosby, also at the University of Massachusetts, Amherst quantify the transition from soft wrinkles to sharper folds. Similar to lifting a tissue from a box, they pull up an elastic sheet floating in water, and image the sheet as first wrinkles, and then folds, appear. They show that folds, like the edges of a neatly made bed, strain the sheet and smooth out the wrinkles.

The experiments offer complimentary insights into how defects, such as an edge or a fold, influence the presence of wrinkles and could prove helpful in understanding the formation of wrinkles in biological tissue.


'/>"/>

Contact: James Riordon
riordon@aps.org
301-209-3238
American Physical Society
Source:Eurekalert  

Page: 1

Related biology technology :

1. Funds Boost Research into Causes, Interventions for Age-Related Cognitive Decline
2. NIST scientists address wrinkles in transparent film development
3. Fibrocell Science, Inc. Receives FDA Complete Response Letter Regarding azficel-T for Wrinkles
4. Fibrocell Science, Inc. Reports Outcome of FDA Advisory Committee Meeting on Azfibrocel-T for Wrinkles
5. Looking Older Than You Are May Have Little to Do With Wrinkles
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ironing out the causes of wrinkles
(Date:3/22/2017)... 2017 /PRNewswire/ - FACIT announced a seed stage ... a start-up created by FACIT focused on developing ... combined with non-dilutive capital, achieves a targeted $3.0M ... enables Propellon to accelerate the nomination of a ... and/or entering a strategic partnership for clinical trials ...
(Date:3/22/2017)... ... March 21, 2017 , ... ... acquire information on the desired increase and/or decrease in antibody-dependent cellular cytotoxicity or ... N-glycosylation profiling of therapeutic antibodies. , To meet this demand, the team ...
(Date:3/22/2017)... ... March 21, 2017 , ... Functional near-infrared spectroscopy (fNIRS), an optical ... as a way to track the brain’s response to acute pain in adults and ... pressor test ,” published today in the journal Neurophotonics , by SPIE, ...
(Date:3/22/2017)... MARLBOROUGH, Mass. , March 22, 2017 /PRNewswire/ ... company developing innovative therapeutics that address significant unmet ... PhD, RXi,s Chief Business Officer, will present at ... The forum will provide a platform to present ... research institutes, leading pharmaceutical and biotech companies as ...
Breaking Biology Technology:
(Date:2/28/2017)... 28, 2017   Acuant , a leading provider ... significant enhancements to new and core technologies building upon ... include mobile and desktop Acuant FRM TM facial ... a real time manual review of identity documents by ... the fastest and most accurate capture software to streamline ...
(Date:2/26/2017)... DALLAS , Feb. 25, 2017  Securus ... justice technology solutions for public safety, investigation, corrections ... of Recidivism and Reentry. "Too often, ... State prisons and county jails are trying to ... of inmates and friends and family members. While significant ...
(Date:2/21/2017)... 21, 2017 Der weltweite Biobanking-Sektor ... Nach einem Gespräch mit mehr als 50 Vertretern aus verschiedenen ... überwinden gilt, um diese Prognose zu realisieren. ... Zu ... der finanziellen Mittel für die Biobank, die Implementierung Zeit ...
Breaking Biology News(10 mins):