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国外文献 > 3.企业技术文献 > TIMKEN铁姆肯 >

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标 题： A STUDY ON RESIDUAL STRESSES ON AUTOFRETTAGED LDPE TUBING INCLUDING THE BAUSCHINGER EFFECT AND STRAIN AGING
关于自润滑LDPE管材残余应力的研究，包括鲍辛格效应和应变老化
作 者： Taylor Nyquist
Kraig Warren
关键词：
出版年： 2021
文集名： Fluid Structure Interaction; High Pressure Technology
流固耦合；高压技术
会议名： 2021 ASME Pressure Vessels & Piping Conference (PVP 2021)
2021年ASME压力容器与管道会议（PVP 2021）
届 次：
摘 要： This paper compares and discusses the change to the residual stresses and strains on four tubes of SA-723 Gr 1 Cl 2 (Timken HS 220) tubing material that were autofrettaged at different Overstrain ratios (20% and 40%). The four tubes were autofrettaged with strain gages to obtain actual OD strain. The effect on the residual stress and strain of the material is reviewed after a single autofrettage and after a low temperature heat treat followed by a second autofrettage. The low temperature heat treat was performed on two of the four tubes to create comparable data. Any strain aging effect from the low temperature heat treat is examined on the measured residual stress and strains. The effect and possible benefits of strain aging and re-autofrettage on tubes with different Overstrain ratios is discussed. To obtain the residual stress values in the tube wall after the autofrettage cycles, the sample tube pieces were tested by X-ray diffraction. The actual residual stresses after autofrettage were then compared with the calculated theoretical residual stresses including Bauschinger effect correction factors from ASME Section VIII Div. 3 KD-5. The residual stress and strain data between one and two rounds of autofrettage is also studied to see if the Bauschinger effect is present.

本文比较并讨论了在不同过应变比（20%和40%）下对四种SA-723 Gr 1 Cl 2（Timken HS 220）管材进行自压紧处理后，其残余应力和残余应变的变化情况。这四种管材均通过应变片测量实际外径应变，并进行了单次自压紧处理及低温热处理后再进行第二次自压紧处理。研究分析了材料在单次自压紧处理以及低温热处理后的残余应力与残余应变变化情况。低温热处理中可能产生的应变老化效应，也对测得的残余应力和残余应变进行了评估。同时探讨了不同过应变比条件下，应变老化效应及重新自压紧处理所带来的影响和潜在优势。为获取自压紧循环后管壁中的残余应力值，对试样管件进行了X射线衍射测试。随后将自压紧后的实际残余应力与根据ASME第八部分第3分册KD-5标准计算出的理论残余应力（含鲍辛格效应修正系数）进行对比。还研究了一次和两次自衬压处理之间的残余应力和应变数据，以观察是否存在鲍辛格效应。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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