A fundamental requirement for safety design of structural components is flaw tolerance. In this field, the soft materials have a unique ability to bear external loads despite the presence of defects, due to their pronounced deformability. Unlike traditional materials, which have an enthalpic elasticity, the mechanical response of a polymer-based material is governed by the state of internal entropy of a molecular network which has a great ability to rearrange the material structure and shape so to minimize the local detrimental effect of flaws. For a correct estimation of the fracture toughness of these materials, a proper knowledge of this entropic effect is needed. In the present research, the mechanical behaviour up to failure of silicone-based cracked plates is examined by taking into account the time-dependent effects. Experimental and theoretical aspects are discussed in order to understand the defect tolerance of such materials.

Fracture toughness of highly deformable polymeric materials / Brighenti, Roberto; Carpinteri, Andrea; Artoni, Federico. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 3(2017), pp. 18-24. [10.1016/j.prostr.2017.04.004]

Fracture toughness of highly deformable polymeric materials

BRIGHENTI, Roberto;CARPINTERI, Andrea;ARTONI, FEDERICO
2017

Abstract

A fundamental requirement for safety design of structural components is flaw tolerance. In this field, the soft materials have a unique ability to bear external loads despite the presence of defects, due to their pronounced deformability. Unlike traditional materials, which have an enthalpic elasticity, the mechanical response of a polymer-based material is governed by the state of internal entropy of a molecular network which has a great ability to rearrange the material structure and shape so to minimize the local detrimental effect of flaws. For a correct estimation of the fracture toughness of these materials, a proper knowledge of this entropic effect is needed. In the present research, the mechanical behaviour up to failure of silicone-based cracked plates is examined by taking into account the time-dependent effects. Experimental and theoretical aspects are discussed in order to understand the defect tolerance of such materials.
Fracture toughness of highly deformable polymeric materials / Brighenti, Roberto; Carpinteri, Andrea; Artoni, Federico. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 3(2017), pp. 18-24. [10.1016/j.prostr.2017.04.004]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2823754
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