Cloaking by coating: how effectively does a thin, stiff coating hide a soft substrate?
Soft Matter
; 16(19): 4574-4583, 2020 May 21.
Article
em En
| MEDLINE
| ID: mdl-32286582
ABSTRACT
From human tissue to fruits, many soft materials are coated by a thin layer of a stiffer material. While the primary role of such a coating is often to protect the softer material, the thin, stiff coating also has an important effect on the mechanical behaviour of the composite material, making it appear significantly stiffer than the underlying material. We study this cloaking effect of a coating for the particular case of indentation tests, which measure the 'firmness' of the composite solid we use a combination of theory and experiment to characterize the firmness quantitatively. We find that the indenter size plays a key role in determining the effectiveness of cloaking small indenters feel a mixture of the material properties of the coating and of the substrate, while large indenters sense largely the unadulterated substrate.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Modelos Biológicos
Idioma:
En
Revista:
Soft Matter
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Reino Unido