Danilo D'Angela

12 Questions 46 Answers 0 Followers

Questions related from Danilo D'Angela

What is the seismological and engineering meaning of the peak ground velocity (PFA) to peak ground acceleration (PGA) ratio?

The PGV to PGA ratio is known as a significant parameter for the damage assessment of structures under earthquake shakings. As a matter of fact, it is considered as a descriptor of the frequency...

18 October 2018 5,123 34 View

How to clean piezoelectric sensors surface from residuals of silicone or similar coupling materials?

After the removal of piezoelectric sensors from the coupled surfaces, the sensing surface has to be accurately cleaned and the layer of the coupling material (e.g., silicone or epoxy) has to be...

30 June 2018 5,738 6 View

AC156: ACCEPTANCE CRITERIA FOR SEISMIC CERTIFIC. BY SHAKE-TABLE TESTING OF NONSTRUCT. COMPNTS. Use of the protocol for testing of unanchored compnts?

AC156 protocol by ICC-ES is finalised to seismic certification of nonstructural components by shake table testing. According to the field literature, there are several cases in which such protocol...

30 June 2018 6,672 1 View

How to evaluate the S-N curve using Compact Tension (CT) specimens?

I am simulating the fatigue behaviour of Compact Tension (CT) samples. I tried to produce the S-N curve, but I am not sure about how to calculate the Nominal Stress. Is it simply evaluated by...

25 January 2018 1,356 11 View

Is it possible to perform high cycle testing using direct cyclic analysis in Abaqus (including low cycle analysis)?

Hello, I did not fin any way in Abaqus to simulate high cycle fatigue testing. It is possible to use direct cyclic analysis but to consider the fatigue response, low cycle analysis has to be taken...

20 June 2017 7,271 0 View

How to find Abaqus parameters for Paris Law (crack initiation and growth)?

Hello,I need to find typical values for c1, c2, c3 and c4, parameters related to fatigue crack growth, needed in Abaqus (*FRACTURE CRITERION, TYPE=FATIGUE). Please, find reference in the following...

15 May 2017 5,018 13 View

Is it possible to model XFEM elements on Abaqus without using damage initiation/evolution for traction separation laws?

I am modeling in Abaqus a metal plate subjected to tension (CT), with an existing crack surface, using XFEM technique. I need to perform cyclic analysis so I need to assign hysteretic response to...

10 May 2017 2,696 5 View

Any suggestion about gaps (discontinuities) in the strain (and stress) plots corresponding to beginning of cycles (direct cyclic analysis in Abaqus)?

I am performing direct cyclic analysis in Abaqus, on a metal plate subjected to tension in order to study the crack growth. Outputs of strain and stress seem to be reliable (in their qualitative...

10 May 2017 9,112 4 View

What is a optimal value for error in residuals for cyclic direct analysis in Abaqus?

As one can see from Abaqus Manual (http://130.149.89.49:2080/v6.7/books/usb/default.htm?startat=pt03ch07s02abo09.html#usb-anl-aconvergeintro), the default residual error for the increment...

08 May 2017 1,027 6 View

How to check if the assigned behaviour of a material (Abaqus) is right?

I am modeling 3D CT specimen on Abaqus. The assigned material is elastic-plastic and damage is defined by separation laws. I tried to check in the results if the elements behaviour is the one I...

04 May 2017 3,137 5 View

Any interested in low cycle fatigue analysis on Abaqus also using XFEM elements?

Hello, I am modeling a metal plate under fatigue tension load (direct cyclic approach in low fatigue analysis on Abaqus) even considering XFEM elements. I have some convergence problems and some...

04 May 2017 1,237 14 View

How to simulate crack growth in plates using low-fatigue cyclic analysis in abaqus?

Hello,I am trying to simulate crack growth in metal plates (CT) under cyclic fatigue analysis. I am using the XFEM approach for an existing crack, so, is it enough take into account the damage...

10 April 2017 7,005 0 View