On the Relaxation of a Mismatching Spheroid by Prismatic Loop Punching

نویسندگان

  • David C. Dunand
  • Andreas Mortensen
چکیده

When a metal containing elongated inclusions is subjected to a large change of temperature, prismatic dislocations are punched into the matrix to relieve the mismatch stresses induced by the different coefficients of thermal expansion (CTE) of the metal and the inclusion. This phenomenon has been observed in metals reinforced with whiskers (1, 2) and silver chloride containing glass and alumina fibers (3-5). It is also relevant to metals containing submicroscopic second phases of elongated shape, such as S-needles in A1-Cu-Mg, 13'-needles in A1-Mg-Si (6) or V(C,N) and AIN rods in steels (7).

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

INVESTIGATING THE EFFECT OF CRACK GEOMETRIES AND WELD MISMATCHING IN ORDER TO OPTIMIZE ECA ANALYSIS OF GIRTH WELDED OFFSHORE PIPELINES

Offshore pipelines are an effective tool for transportation of oil and gas which are usually assembled by the use of girth welds. Since flaws may naturally exist at such welds, fracture assessment of girth welded offshore pipelines is substantial. Current fracture assessment procedures like BS 7910 consider identical material properties for the weld and the base metals. However the strength dif...

متن کامل

Improving the Punching Shear Strength of RC Slabs by FRP and Steel Sheets

This paper deals with the modeling of punching shear failure in reinforced concrete slabs using nonlinear finite element analysis. The 3D finite element analyses (FEA) were performed with the appropriate modeling of element size and mesh, and the constitutive modeling of concrete. The FE numerical models are validated by comparing with the experimental results obtained from tested specimens and...

متن کامل

Comparison of radiosensitizing effect of Resveratrol on monolayer and spheroid culture of DU145 prostatic cell line

Background: Radiotherapy is an established therapeutic modality for prostate cancer. Resveratrol, a natural antioxidant, has been shown to inhibit carcinogenesis and to block the process of tumor initiation and progression. No data is available on the response of cellular spheroid to Reseveratol. In this study we have examined the effect of Resveratol on the radiation response of human p...

متن کامل

STAG ES OF DEVELOPMENT OF RENAL GLOMERULI IN THE NEWBORN RAT KIDNEY

Glomerular development of the kidney was studied in newborn rats by electron microscopy. Four different stages of glomerular development were defined: vesicle fonnation, S-shaped body stage, capillary loop fonnation, and glomerular maturation. In the fust stage, the mesenchymal cells form a spheroid mass. This is followed by the S-shaped body stage in which clefts appear in the mass. Afte...

متن کامل

Estimation of Punching Shear Capacity of Concrete Slabs Using Data Mining Techniques

Punching shear capacity is a key factor for governing the collapsed form of slabs. This fragile failure that occurs at the slab-column connection is called punching shear failure and has been of concern for the engineers. The most common practice in evaluating the punching strength of the concrete slabs is to use the empirical expressions available in different building design codes. The estima...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003