TEMPORAL CHARACTERISTICS OF LOADING FOR CREEP BUCKLING OF PLATES
黏弹性薄板蠕变屈曲的载荷-时间特性研究

Time-dependent characteristics of buckling load under creep condition are studied by analyzing the stability of viscoelastic plate. A time-dependent function that depends upon the materials behavior in the buckling equation of a plate is derived. Buckling load of the structure is investigated theoretically. The analytical results show that the creep buckling is dependent not only upon the dimensions of structure but also the viscoelastic behavior of material. There exists a "delay buckling" under creep condition. The value of critical load of instability relates to time and depends on the functions of material. Under a given load, instability may occur with a time delay. The tests of thin-plate by means of HDPE (high density polyethylene) were to be done by authors. The experimental results are in good agreement with theoretical analysis.