Strain and temperature dependences in anisotropic constitutive equations for metal plasticity
金属塑性各向异性本构方程中的应变和温度依赖性
基本信息
- 批准号:04650099
- 负责人:
- 金额:$ 0.32万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1992
- 资助国家:日本
- 起止时间:1992 至 1993
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Personal computer controlled combined stress testing machine was developed in 1991. For investigation into anisotropic elastic-viscoplastic behavior of metals at high temperature, an electric furnace attachable to this testing machine and temperature controller were designed and developed. Rods for combined axial and torsional loading with water-cooler were also designed and developed. The expense for developments of these apparata was supported by this grant. The change in outer diameter and gauge length and torsional deformation of specimen are transmitted to outside of the furnace. Since the apparatus for measuring outer diameter is fixed to the wall of furnace, anvils slip on the surface of the specimen. The noise caused by slip is smoothed out by data processing. The change in diameter is detected by strain gauges on thin plates. The measuring apparatus for combined axial and torsional deformation must be attached to specimen without constraint to the deformation of the specimen. … More But usual protrusion is not adequate for thin-walled specimen. To cope with this problem, smooth specimen was adopted and a device with link and weight was designed. In the designed measuring apparatus, the axial and torsional deformation is separated and detected by differential transformer. The expense for four sets of transformer and connecting cable and braket was supported by this grant. The multi-displacement meter for these transformers was an another outlay. But the designed apparatus could not be developed because of shortage of expense.Relating to this project, a software for room temperature experiments of bilinear plastic strain path and determination of subsequent yield surface was developed. Furthermore, a study on expression of strain history dependent elastic-plastic constitutive relation with a truss lattice model was presented at JSME Kansai branch meeting held on Nov.1992. Strain-rate and temperature dependency of the deformation behavior of a superplastic material was investigated in 1993. Results will be presented in near future. Less
1991年研制出微机控制的组合式应力试验机。为了研究金属材料的高温弹粘塑性各向异性行为,设计并研制了与该试验机配套的电炉和温度控制器。还设计和开发了带水冷器的轴向和扭转组合加载杆。这些设备的开发费用由这笔赠款支持。试件外径、标距的变化和扭转变形都传递到炉外。由于测量外径的装置固定在炉壁上,因此砧座会在试样表面滑动。通过数据处理,消除了滑移引起的噪声。通过薄板上的应变片检测直径的变化。轴向和扭转组合变形的测量装置必须连接到试样上,而不限制试样的变形。 ...更多信息 但对于薄壁试件,通常的凸度并不适用。为了科普这一问题,采用光滑试件,并设计了带连杆和配重的装置。在所设计的测量装置中,轴向和扭转变形被分离,并通过差动Transformer检测。四套Transformer及连接电缆和支架的费用由该赠款支持。这些变压器的多位移计是另一项支出。结合本课题,开发了一套双线性塑性应变路径室温实验及后续屈服面确定软件。此外,在1992年11月召开的日本中小企业关西分支会议上,提出了用桁架格构模型表达应变历史相关弹塑性本构关系的研究。1993年研究了超塑性材料变形行为的应变率和温度依赖性。结果将在不久的将来公布。少
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