摘要
本文首次用模型试验的方法,全面地揭示了锤杆动态应力的分布规律,提出了应力危险区的概念,探明了最大拉压应力的数量关系,并运用应力波理论成功地分析了拉压应力形成机理,为锤杆的正确设计和使用提供了科学依据.
According to data available to the authors on the cracking of hammer rods in service,such cracking
occurs rather too frequently and is,in the authors' opinion,due to inadequacy in present design practice.
In this paper,the authors present new design suggestions that appear to succeed in reducing greatly
the number of cracking failures of hammer rods in service.
In a previous paper by the first two authors[5],it was established experimentally that more than 60%
of cracking failures occur in zones of high tensile stresses.In this paper,the authors analyze the conditions
under which a conspicuous phenomenon,very much similar to vibration resonance,occurs under repeated
impact.Such analysis allows the authors to make design suggestions to reduce the magnitude of such phe-
nomenon and consequently the magnitudes of tensile stresses.
The authors' suggested improvement in design was adopted in December 1991 by one user of die forg-
ing.After one year of service,the hammer rod has not yet cracked.Measurement of the peak tensile stress
in the hammer rod shows significant reduction.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1993年第4期504-509,共6页
Journal of Northwestern Polytechnical University