Analyzing the long-term creep behavior of composite pipes: Developing an alternative scenario of short-term multi-stage loading test

Rafiee Roham; Ghorbanhosseini Amin

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Analyzing the long-term creep behavior of composite pipes: Developing an alternative scenario of short-term multi-stage loading test

机译：分析复合管道的长期蠕变行为：开发短期多阶段加载试验的替代方案

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摘要

Glass Fiber Reinforced Polymer pipes (GFRP) are used in a variety of industries such as water, oil and gas, aerospace and chemical industries. In the present paper, the creep response of GFRP pipes undergoing compressive transverse loading is analyzed through experimental observations and numerical modeling. Firstly, the long-term creep response of a GFRP pipe is investigated under single-stage loading fill more than 400 days. Then, the creep response of another sample from the same pipe is evaluated under multi-stage loading with four 720-h steps (totally 2880 h). Theoretical modeling is performed using a two-level model based on short-term viscoelastic behavior of resin. A procedure is proposed to replace a long-term creep test under a single stage loading with short-term creep tests with multi-stage loading. The proposed procedure is validated through experimental study. The proposed multi-stage creep test scenario is very valuable to reduce the duration of experimental creep test. Utilizing the proposed method during the design process of a GFRP pipe, the creep response of the pipe can be estimated and its long-term properties can be ensured by performing equivalent short-term tests. The proposed procedure is validated through experimental study.

机译：玻璃纤维增强聚合物管（GFRP）用于各种行业，如水，石油和天然气，航空航天和化学工业。在本文中，通过实验观察和数值建模分析了正在进行压缩横向载荷的GFRP管的蠕变响应。首先，在400天的单级装载下调查GFRP管道的长期蠕变响应。然后，在具有四个720-H步骤的多级负载下评估来自同一管道的另一个样品的蠕变响应（共2880小时）。基于树脂短期粘弹性的两级模型进行理论建模。提出了一种过程，用于在单级载荷下替换长期蠕变试验，其中短期蠕变试验具有多级负载。通过实验研究验证了所提出的程序。所提出的多级蠕变测试场景非常有价值，可以减少实验蠕变试验的持续时间。利用所提出的方法在GFRP管道的设计过程中，可以估计管道的蠕变响应，并且通过执行等效的短期测试可以确保其长期特性。通过实验研究验证了所提出的程序。

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来源
《Composite Structures》 |2020年第12期|112868.1-112868.11|共11页
作者
Rafiee Roham; Ghorbanhosseini Amin;
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作者单位

Univ Tehran Fac New Sci & Technol Composites Res Lab Tehran 1439955171 Iran;

Univ Tehran Fac New Sci & Technol Composites Res Lab Tehran 1439955171 Iran;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Long-term creep; Viscoelastic behavior; Simulation; Multi-stage loading; Composite pipes;

机译：长期蠕变;粘弹性行为;模拟;多级载荷;复合管道;

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1. Predicting long-term creep failure of bimodal polyethylene pipe from short-term fatigue tests [J] . Zheng Zhou, Anne Hiltner, Eric Baer Journal of Materials Science . 2011,第1期

机译：通过短期疲劳测试预测双峰聚乙烯管的长期蠕变破坏
2. Predicting long-term creep failure of bimodal polyethylene pipe from short-term fatigue tests [J] . Zhou Z., Hiltner A., Baer E. Journal of Materials Science . 2011,第1期

机译：通过短期疲劳测试预测双峰聚乙烯管的长期蠕变破坏
3. Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test [J] . s.D.Lin, J.M.Rahee, C.Nah International Polymer Processing: The Journal of the Polymer Processing Society . 2004,第3期

机译：使用短期蠕变测试预测塑料的长期蠕变行为
4. Creep Test and Long-term Mechanical Property Analysis for Reinforced Cured-in-Place Pipe (CIPP) Composites [C] . Hyun Wook Ji, Sungsoo Yoo, Jonghoon Kim, NASTT's No-Dig Show Conference;North American Society for Trenchless Technology . -1

机译：增强固化管（CIPP）复合材料的蠕变试验和长期力学性质分析
5. Characterization of long-term creep behavior of polymer composites by the use of dynamic test methods and micromechanical models. [D] . Wen, Yuan-Feng. 1994

机译：使用动态测试方法和微力学模型表征聚合物复合材料的长期蠕变行为。
6. Long-Term Creep Behavior Prediction of Sol-Gel Derived SiO2- and TiO2-Wood Composites Using the Stepped Isostress Method [O] . Ke-Chang Hung, Tung-Lin Wu, Jyh-Horng Wu 2019

机译：逐步等应力法预测溶胶-凝胶衍生的SiO2-和TiO2-木材复合材料的长期蠕变行为
7. Decision-making is the process of analyzing information about a problem situation and comparing it to a specific conclusion in order to solve a specific problematic (Yıkılmaz, 2001; Miller and Byrnes, 2001). Decision-making styles are a mechanism that is influenced by the internal and external conditions that determine the direction of the decisions of the individual, the content of the decision-making process, and the outcome of the decision-making process (Payne, Bettman and Johson, 1993; Bavol’ár and Orosová, 2015). ACT is a contemporary member of the Cognitive Behavioral Therapy family. ACT (Acceptance and commitment therapy) has both similar and different directions with Behavioral Therapies and Cognitive Therapies (Herbet and Forman, 2011; Hayes, 2004). KKT responds to classical behavioral treatments using both existential and cognitive approaches in the analysis of behavior. KKT is a science wing that tries to solve human problems with a wider perspective aimed at solving problematic human behaviors (Plumb, Stewart, Dahl and Lundgren, 2009). It is seen that there is very little research about the new approach of ACT approach when the aiming country of our country is screened and it is thought that our country will contribute to the field of psychological counseling with the work done. In the scope of the research, experimental and control groups and preliminary test, post-test and follow-up measurements of 2x3 experimental design were used. The study's study group consists of a total of 24 (12 experimental and 12 control groups) university students studying in different departments and levels, continuing their education in the academic year of 2015-2016 in Ağrı province and İbrahim Chechen University in 2015-2016 academic year. The average age of participants in the experiment and control group is 20. There were 12 participants in the experimental group, 7 female and 5 male, and 12 participants, 7 female and 5 male in the control group. Personal Information Form and Decision Making Style Scale prepared by the researcher were used in the research. In order to decide on the tests to be used in the course of analyzing the data, the scores of the participant's Decision Styles Scale pre-test, which are placed primarily in the experimental and control groups, it was analyzed whether the basic expectations of parametric tests were answered. As a result of the analysis made, the scores, skewness and kurtosis coefficients obtained from the Decision Making Styles Scale were given to the experimental and control groups. It was determined that the distribution was normal in the result of Shapiro-Wilk test, in which the skewness and kurtosis coefficients of each sub-scale were ranked between -1 and +1. Participants in the experimental and control groups; homogeneity test results for decision-style pre-test measurements indicate that the data are homogeneous. According to the results of the Mauchly Globalness Test, it has been determined that working supports the hypothesis. It was determined that there was no significant difference between the pre-test scores obtained from dependent decision-making style of experiment and control groups, but the test group showed lower mean scores at the significant level within the scores of post-test and follow-up tests. Therefore, it can be said that the ACT-oriented psychoeducation program applied to the experimental group reduces the dependent decision-making style scores from the decision style sub-dimensions and the psychoeducation program has a lasting effect. It was determined that there was no significant difference between pre-test, post-test and follow-up scores obtained from the Spontaneous-Instant Decision Style of experiment and control groups. Thus, it can be said that this situation does not cause a significant difference in the Spontaneous-Decision-Making Style scores from the decision style sub-dimensions of the ACT-oriented psychoeducation program applied to the experimental group. The ACT -oriented psychoeducation program had a decline in the intuitive decision-making styles of the individuals, but this decrease did not create significant differences. Thus, it can be said that this situation does not make a meaningful difference in the intuitive decision style scores from the decision style sub-dimensions of the KKT oriented psychoeducation program applied to the experimental group. The pre-test scores obtained from the rational decision-making style of the experimental and control groups showed that there was a difference between the post-test and the follow-up scores, but this difference was not significant. As a result of the analysis, it was determined that the test group had higher levels of rational decision style than the pre - test scores in the post test and follow - up scores, whereas the post test and follow - up test scores in the control group rational decision style showed a decrease compared to the pre - test scores. the pre - test scores. Decision-making Styles Scale Avoidant Decision Making As a result of the analysis of the mean scores of the subscale scores of pre-test, post-test and follow-up measures, the group effect was found to be insignificant. It was determined that the experimental and control groups differed significantly from the pre-test scores obtained from the avoidant decision-making style but did not show any significant change within the scores of the post-test and follow-up tests. [O] . mustafa ercengiz, ali haydar şar 2018

机译：决策是分析有关问题情况的信息并将其与特定结论进行比较的过程，以解决特定的问题（Yıkılmaz，2001; Miller和Byrnes，2001）。决策风格是一种机制，受到内部和外部条件的影响，确定个人决定的方向，决策过程的内容以及决策过程的结果（PAYNE，BETTMAN和BEDNE） Johson，1993;Bavol'ár和奥萨洛瓦，2015）。法案是认知行为治疗家庭的当代成员。行为（验收和承诺治疗）具有与行为疗法和认知疗法的类似和不同方向（Herbet和Forman，2011; Hayes，2004）。 KKT在分析行为中使用存在性和认知方法来响应古典行为治疗方法。 KKT是一个科学翼，试图解决人类问题，旨在解决有问题的人类行为（铅垂，斯图尔特，Dahl和Lundgren，2009）。有人认为，当我们国家的瞄准国家进行筛选时，有关行动方法的新方法几乎没有研究，并且认为我们的国家将为完成工作做出贡献的心理咨询领域。在研究的范围内，使用实验和对照组和初步测试，使用后测试和后续测量的2x3实验设计。该研究的研究小组包括共24名（12个实验和12个对照组）大学学生在不同的部门和水平上学习，在2015-2016学术上继续进行2015-2016的学术年度2015-2016学年年。实验和对照组参与者的平均年龄是20.实验组中有12名参与者，7名女性和5名男性，12名参与者，7名女性和5名男性。研究人员准备的个人信息表格和决策制定风格规模在研究中使用。为了决定在分析数据的过程中使用的测试，参与者的决策风格刻度预测的分数主要在实验和对照组中进行，分析了参数的基本期望吗？测试得到了回答。由于对实验和对照组给出了从决策曲调标度获得的分数，偏移和峰度分子系数。确定该分布是正常的在成熟的-WILK试验结果中，其中每亚级的偏差和刚度系数在-1到+1之间排名。实验和对照组的参与者;决策式预测测量的同质性测试结果表明数据是均匀的。根据毛毛环保试验的结果，已确定工作支持假设。据确定，从依赖决策风格的实验和对照组获得的预测分数之间没有显着差异，但测试组在测试后的分数内显示出较低的平均分数和后续的分数 - 测试。因此，可以说，应用于实验组的面向活动的心理教育程序减少了决策风格子维度的依赖决策风格分数，并且心理教育程序具有持久的效果。据确定，从实验和对照组自发决策风格获得的预测试，测试后和后续评分之间没有显着差异。因此，可以说这种情况不会导致从应用于实验组的活动导向的心理教育程序的决策风格分数的自发决策风格分数显着差异。行为的心理教育计划在个人直观的决策风格下降，但这种减少并没有产生显着的差异。因此，可以说，这种情况不会在从应用于实验组的KKT导向的心理教育程序的决策风格分数中产生有意义的决策风格分数。从实验和对照组的理性决策风格获得的预测分数显示后检验后和随访评分之间存在差异，但这种差异并不重要。由于分析，确定测试组的理性决策风格较高，而不是后测试和后续分数的预测分数，而对照组合理决策风格的后测试和后续测试分数显示出与预测试分数相比的减少。预测分数。决策款式扩展避免决策由于分析了预测试，测试后和后续措施的班次评分的平均分数，发现群体效应是微不足道的。确定实验和对照组从避免决策风格获得的预测评分中显着不同，但在测试后和后续测试的分数内没有显示出任何重大变化。
8. AN APPROACH TO ESTIMATING LONG-TERM MULTIAXIAL CREEP BEHAVIOR FROM SHORT-TERM UNIAXIAL CREEP RESULTS [R] . John Wu-Shuang Chuang, Thomas W. Kennedy, Ervin S. Perry 1970

机译：一种从短期单轴蠕变结果估计长期多轴蠕变行为的方法

Analyzing the long-term creep behavior of composite pipes: Developing an alternative scenario of short-term multi-stage loading test

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