中文摘要：

非线性粘弹性爬性质(甲基 methacrylate ) poly 在短期的测试在各种各样的温度和压力层次被测量检查 time-temperature-stress 重叠原则的适用性，它是时间温度重叠的联合形式原则和时间压力重叠原则。一位统一主人爬依从曲线被时间温度重叠和时间压力重叠的联合申请从短期的测试构造。统一主人曲线在二年建立 creep 依从，它比测试持续时间长 4.2 十年。而且，在非线性的粘弹性的盒子中，时间温度移动因素依赖于移动在被使用的压力，这被验证，当时间压力移动因素依赖于温度时。

英文摘要：

Nonlinear viscoelastic creep properties of poly （methyl methacrylate） at various temperatures and stress levels were measured in short-term tests to check the applicability of time-temperature-stress superposition principle, which is the combined form of time-temperature superposition principle and time-stress superposition principle. A unified master creep compli- ance curve was constructed from the short-term tests by joint application of time-temperature superposition and time-stress superposition. The unified master curve establishes the creep com- pliance over two years, which is 4.2 decades longer than the test duration. Moreover, it is verified that in nonlinear viscoelastic cases, the time-temperature shift factors are dependent on stresses at which the shifts are applied, while the time-stress shift factors are dependent on temperatures.