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Separable finite viscoelasticity: integral-based models vs. experiments
Mechanics of Time-Dependent Materials ( IF 2.1 ) Pub Date : 2018-03-07 , DOI: 10.1007/s11043-018-9383-2
Nidhal Jridi , Makrem Arfaoui , Adel Hamdi , Michelle Salvia , Olivier Bareille , Mohamed Ichchou , Jalel Ben Abdallah

In the present paper, the predictive capabilities of some integral-based finite strain viscoelastic models under the time–strain separability assumption have been investigated through experimental data for monotonic, relaxation and dynamic shear loads, in time and frequency domains. This analysis is instigated by experimental investigation results on two vulcanized carbon black filled rubbers. A unified identification procedure has been deployed to all models to determine the constitutive parameters. The monotonic tests were performed to capture the rate dependent and the long-term response of the materials. For the purely hyperelastic response, we considered the proposed hyperelastic potential proposed in Abaqus for incompressible materials. Relaxation tests were intended to identify the time-dependent material properties, and completed with a dynamic mechanical analysis. Models under consideration are Christensen, Fosdick & Yu, a variant of BKZ model, and the Simo model implemented in Abaqus. In the time domain, for each test case and for each model, the nominal stress is hence compared to experimental data, and the predictive capabilities are then examined with respect to three polynomial hyperelastic potentials forms. The dynamic properties had been investigated in the frequency domain with respect to the frequency and predeformation dependencies, and then comparison conclusions have been drawn.



中文翻译:

可分离的有限粘弹性:基于积分的模型与实验

在本文中,通过在时域和频域中单调,松弛和动态剪切载荷的实验数据,研究了一些基于整体的有限应变粘弹性模型在时应变可分离性假设下的预测能力。通过对两种硫化的炭黑填充橡胶的实验研究结果来激发这种分析。统一的识别程序已部署到所有模型,以确定本构参数。进行单调测试以捕获材料的速率依赖性和长期响应。对于纯超弹性响应,我们考虑了Abaqus中针对不可压缩材料提出的超弹性潜力。松弛测试旨在确定随时间变化的材料特性,并完成了动态力学分析。正在考虑的模型是Christensen,Fosdick和Yu(BKZ模型的变体)以及在Abaqus中实现的Simo模型。因此,在时域中,对于每个测试用例和每个模型,将名义应力与实验数据进行比较,然后针对三种多项式超弹性势形式检查其预测能力。针对频域和预变形的相关性,在频域中研究了动态特性,然后得出了比较结论。因此,将名义应力与实验数据进行了比较,然后针对三种多项式超弹性势形式检查了预测能力。针对频域和预变形的相关性,在频域中研究了动态特性,然后得出了比较结论。因此,将名义应力与实验数据进行了比较,然后针对三种多项式超弹性势形式检查了预测能力。针对频域和预变形的相关性,在频域中研究了动态特性,然后得出了比较结论。

更新日期:2018-03-07
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