Shear stress during self-assembly encodes stiffness of network-based materials
Abstract
The mechanical properties of network-based materials have been extensively studied under qui- escent conditions, yet their self-assembly in nature occurs mainly in a mechanically stressed envi- ronment. Here, we show that the stiffness of collagen networks, one of the main building blocks of the mammalian extracellular matrix, can be tuned by applying shear stress during gelation, which first strains and aligns the material, then triggers a dramatic irreversible increase in the elastic modulus. This stiffening is anchored by maintaining the stress until the gel is fully matured. Using particle-based simulations, we show that the underlying microscopic mechanism is likely generic to a broad class of network-based systems and arises from two synergetic effects: changes in the network orientation and topology through the formation of permanent contacts that stabilize the system. Our findings are rationalized using a rigidity percolation framework and offer a general principle for encoding elasticity in biological and synthetic networks.
Related
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BibTeX
@misc{dedroog2026shear,
title = {{Shear stress during self-assembly encodes stiffness of network-based materials}},
author = {Lens M. Dedroog and Olivier Deschaume and Carmen Bartic and Yovan de Coene and Erin Koos and Minne P. Lettinga and Mehdi Bouzid},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.30520},
eprint = {2609.30520},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.30520},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Shear stress during self-assembly encodes stiffness of network-based materials
AU - Lens M. Dedroog
AU - Olivier Deschaume
AU - Carmen Bartic
AU - Yovan de Coene
AU - Erin Koos
AU - Minne P. Lettinga
AU - Mehdi Bouzid
PY - 2026
DA - 2026/09/24
PB - arXiv
DO - 10.48550/arxiv.2609.30520
UR - https://arxiv.org/abs/2609.30520
AB - The mechanical properties of network-based materials have been extensively studied under qui- escent conditions, yet their self-assembly in nature occurs mainly in a mechanically stressed envi- ronment. Here, we show that the stiffness of collagen networks, one of the main building blocks of the mammalian extracellular matrix, can be tuned by applying shear stress during gelation, which first strains and aligns the material, then triggers a dramatic irreversible increase in the elastic modulus. This stiffening is anchored by maintaining the stress until the gel is fully matured. Using particle-based simulations, we show that the underlying microscopic mechanism is likely generic to a broad class of network-based systems and arises from two synergetic effects: changes in the network orientation and topology through the formation of permanent contacts that stabilize the system. Our findings are rationalized using a rigidity percolation framework and offer a general principle for encoding elasticity in biological and synthetic networks.
ER -