论文标题
校准负载持续时间和费率的木材产品：统计查看三个损坏模型
Calibrating wood products for load duration and rate: A statistical look at three damage models
论文作者
论文摘要
木材和基于木材的产品是多功能的建筑材料，由于施加的应力而容易减弱。为了评估负载持续时间和速率的效果，通过将预设负载曲线应用于样品样本，进行了实验。本文通过考虑文献中的三个模型来研究这些效果：Gerhards和Foschi积累了损坏模型，以及基于伽马过程的降级模型。我们提出了一个统计框架，将这些模型拟合到通过坡道和恒定负载设置的组合生成的故障时间数据，并显示如何量化不确定性。说明了模型和方法，并通过对铁杉木材数据集的新分析进行了比较。在随机的未来载荷下的长期可靠性预测中，证明了拟合损伤模型的实际用法。
Lumber and wood-based products are versatile construction materials that are susceptible to weakening as a result of applied stresses. To assess the effects of load duration and rate, experiments have been carried out by applying preset load profiles to sample specimens. This paper studies these effects via a damage modeling approach, by considering three models in the literature: the Gerhards and Foschi accumulated damage models, and a degradation model based on the gamma process. We present a statistical framework for fitting these models to failure time data generated by a combination of ramp and constant load settings, and show how estimation uncertainty can be quantified. The models and methods are illustrated and compared via a novel analysis of a Hemlock lumber dataset. Practical usage of the fitted damage models is demonstrated with an application to long-term reliability prediction under stochastic future loadings.
