CAJ | 학술논문

基于双金属管水压复合工艺，提出了一种利用材料极限弹性膨胀特征曲线控制双金属管水压复合效果的方法。复合管接触应力试验表明，为了获得最佳的复合效果，外基管材质级别要尽可能高，而内衬管材质也应采用刚度匹配的材料；在内衬管和外基管的材料既定的情况下，复合过程采用的水压越大，复合管获得的剩余弹性势能越多，复合效果越好。复合管水压膨胀试验结果表明，当外基管的膨胀过程处于由弹性变形向塑性变形阶段过渡的拐点时，复合管将获得最大剩余弹性势能，可确保复合管双金属层达到最佳贴合状态。
기우쌍금속관수압복합공예，제출료일충이용재료겁한탄성팽창특정곡선공제쌍금속관수압복합효과적방법。복합관접촉응력시험표명，위료획득최가적복합효과，외기관재질급별요진가능고，이내츤관재질야응채용강도필배적재료；재내츤관화외기관적재료기정적정황하，복합과정채용적수압월대，복합관획득적잉여탄성세능월다，복합효과월호。복합관수압팽창시험결과표명，당외기관적팽창과정처우유탄성변형향소성변형계단과도적괴점시，복합관장획득최대잉여탄성세능，가학보복합관쌍금속층체도최가첩합상태。
Based on the bimetal pipe hydraulic composite process, it put forward a way to control bimetal pipe hydraulic composite effect by using the expansion characteristic curve of material limit elasticity. The contact stress test showed that in order to get the best composite effect, the material grade of outer tube should be as high as possible, and stiffness matching material should be adopted for lining tube. Under the condition of defined material for outside and inside pipe, the greater in water pressure in course of recombination process, the much more elastic potential energy to be obtained, and the recombination effect will be much better. The hydraulic expansion test result showed that when the expansion process is in the inflection point from elasticity deformation to plasticity deformation stage, the bimetal pipe will get maximum residual elastic potential energy, which can ensure that double metal layer to achieve the best attaching status.