压力容器
壓力容器
압력용기
2001年
3期
31-33
,共3页
王立君%徐礼德%卢凤桂%杨庆江
王立君%徐禮德%盧鳳桂%楊慶江
왕립군%서례덕%로봉계%양경강
聚乙烯管材%焊接%蠕变%应力场
聚乙烯管材%銲接%蠕變%應力場
취을희관재%한접%연변%응력장
具有优良的耐寒、耐蚀和很好抗开裂性的聚乙烯(PE)管材在压力管道领域已得到广泛应用。评价这种粘弹性的PE管材的承载性能时需要考虑蠕变的影响。本文测定了燃气用PE80管材热板焊接接头的蠕变柔量，研究了蠕变对焊缝裂尖应力场的影响。结果表明在外载恒定的情况下，蠕变的发展会使焊缝裂尖的应力奇性增加，裂纹扩展的驱动力增大。
具有優良的耐寒、耐蝕和很好抗開裂性的聚乙烯(PE)管材在壓力管道領域已得到廣汎應用。評價這種粘彈性的PE管材的承載性能時需要攷慮蠕變的影響。本文測定瞭燃氣用PE80管材熱闆銲接接頭的蠕變柔量，研究瞭蠕變對銲縫裂尖應力場的影響。結果錶明在外載恆定的情況下，蠕變的髮展會使銲縫裂尖的應力奇性增加，裂紋擴展的驅動力增大。
구유우량적내한、내식화흔호항개렬성적취을희(PE)관재재압력관도영역이득도엄범응용。평개저충점탄성적PE관재적승재성능시수요고필연변적영향。본문측정료연기용PE80관재열판한접접두적연변유량，연구료연변대한봉렬첨응력장적영향。결과표명재외재항정적정황하，연변적발전회사한봉렬첨적응력기성증가，렬문확전적구동력증대。
Polyethylene pipes, which are of good cold-resistance, corrosion-resistance and crack-resistance,have been widely used in the field of pressure pipe. When the load-carrying performances of these visco-elastic PE pipes are evaluated, the influences of creep have to be studied. In this paper, the creep compliance of Hot-plate welded joint of PE80 pipe is measured, and the effect of creep on the crack tip stress field in the weld is investigated. Results show that the development of creep makes the crack tip stress singularity in the weld and the driving force for crack growth increased.
