压力容器
壓力容器
압력용기
2001年
2期
12-14
,共3页
汤晓英%周斌生%王正东%吴东棣
湯曉英%週斌生%王正東%吳東棣
탕효영%주빈생%왕정동%오동체
损伤力学%低周疲劳%疲劳损伤%损伤演变%寿命估算
損傷力學%低週疲勞%疲勞損傷%損傷縯變%壽命估算
손상역학%저주피로%피로손상%손상연변%수명고산
对在周期加载条件下运行的锅炉、压力容器、压力管道等设备，不可避免地产生低周疲劳的失效。本文从损伤力学基本理论出发，以10CrMo910钢作为研究对象，采用应力幅法测量材料的低周疲劳损伤，提出了低周疲劳各向同性连续损伤模型，在有效应力和应变等价假设基础上建立了低周疲劳损伤演变和寿命估算式。
對在週期加載條件下運行的鍋爐、壓力容器、壓力管道等設備，不可避免地產生低週疲勞的失效。本文從損傷力學基本理論齣髮，以10CrMo910鋼作為研究對象，採用應力幅法測量材料的低週疲勞損傷，提齣瞭低週疲勞各嚮同性連續損傷模型，在有效應力和應變等價假設基礎上建立瞭低週疲勞損傷縯變和壽命估算式。
대재주기가재조건하운행적과로、압력용기、압력관도등설비，불가피면지산생저주피로적실효。본문종손상역학기본이론출발，이10CrMo910강작위연구대상，채용응력폭법측량재료적저주피로손상，제출료저주피로각향동성련속손상모형，재유효응력화응변등개가설기출상건립료저주피로손상연변화수명고산식。
The equipment,such as toiler,pressure vessel and pipeline,subjected to cyclical load suffer failure as a result of the low cycle fatigue (LCF).In this paper,based on the continuum damage mechanics(CDM)theory,the LCF damage variable is measured through stress amplitude method during the strain controlled tests,and a continuum damage model of isotropic LCF is derived.The material tested is a 10CrMo910 steel.The LCF damage evolution equation and life estimate have been derived by use of the effective stress concept and the hypothesis of strain equivalence.
