仿真实验链网络中宏观软化与微观断裂的普遍缩放
Universal Scaling of Macroscopic Softening and Microscopic Scission in Phantom Chain Networks
AI总结:
该研究通过分析仿真实验链聚合物网络的断裂复杂性,发现其可以分解为两个普遍主曲线:(i) 由绝对伸长率主导的宏观软化,以及 (ii) 仅由相对伸长率主导的微观断裂。通过之前提出的网络力学模型,推导出一个解析表达式,以定量捕捉微观损伤的非线性增长。结合软化指数与聚合物-溶液缩放关系,得到一个新的简单关系式,σ_{nb} / G ∝ (c / c^*)^{(-1/3)},其中σ_{nb}是名义断裂强度,G是初始剪切模量,c是预聚物浓度,c^*是其重叠阈值。
摘要:
本研究证明,仿真实验链聚合物网络中断裂的表面复杂性完全分解为两个普遍主曲线:(i) 由绝对伸长率主导的宏观软化,以及 (ii) 仅由相对伸长率主导的微观断裂。利用之前提出的网络力学模型,推导出一个解析表达式,以定量捕捉微观损伤的非线性增长。结合软化指数与聚合物-溶液缩放关系,得到一个新的简单关系式,σ_{nb} / G ∝ (c / c^*)^{(-1/3)},其中σ_{nb}是名义断裂强度,G是初始剪切模量,c是预聚物浓度,c^*是其重叠阈值。
英文摘要:
This study demonstrates that the apparent complexity of fracture in phantom-chain polymer networks is fully decoupled into two universal master curves: (i) macroscopic softening governed by the absolute stretch, and (ii) microscopic scission governed solely by the relative stretch. Using the previously proposed network mechanics model, an analytical expression has been derived to quantitatively capture the nonlinear growth of microscopic damage. Combining the softening exponent with polymer-solution scaling yields a simple novel relationship, $σ_{nb} / G \propto (c / c^* )^{(-1/3)}$, where $σ_{nb}$ is the nominal broken strength, $G$ is the initial shear modulus, $c$ is the prepolymer concentration, and $c^*$ is its overlapping threshold.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。