Add Fall 2018 newsletter.

Refs idaholab#174.

doc/content/news/2018-10.md

@@ -1,2 +1,24 @@
-# MASTODON Newletter (October 2018)
+# MASTODON Newsletter (Fall 2018)
 
+##MASTODON R&D 100 Finalist
+MASTODON is an R&D 100 finalist for 2018. The final winners will be announced on November 16th.
+
+##Beam Elements in MASTODON
+Geometrically nonlinear beam and lumped mass/inertia elements have been recently added to MASTODON. These elements can now be used to approximate structures using stick-mass models. As a test scenario, stick-mass model of a nuclear power plant from the SASSI manual (Figure 1) was modeled using MASTODON and LS-Dyna. The first 15 natural frequencies of the MASTODON model agree well the SASSI and the corresponding LS-Dyna models, and the spectral acceleration of a location on the structure matches well with the LS-Dyna results as shown in Figure 1.
+
+##Structural Dynamics Lab
+The Facility Risk Group is setting up the Structural Dynamics Laboratory (SDL) at INL to collect data by conducting a series of experiments. The first set of experiments focus on the interface behavior of soil and structures. For this purpose, a reaction frame has been designed to house a soil box and two high capacity actuators. The data is collected by state-of-the-art equipment including slip sensors, string potentiometers, load cells and high-resolution cameras. The collected data, along with the existing literature, will be the basis for the soil-structure interface models that will be integrated to MASTODON.
+![_Figure 2: Photograph of the soil box and the reaction frame in the structural dynamics laboratory._](Macintosh HD/Users/petelm/Desktop/Reporting/November2018MASTODONNewsletter.fld/image003.jpg)
+_Figure 2: Photograph of the soil box and the reaction frame in the structural dynamics laboratory._
+
+##Facility Risk Group Presents at the NPH Workshop
+The DOE Natural Phenomena Hazards (NPH) meeting was held on 23rd and 24th October and was attended by various professionals working on the safety of nuclear structures from seismic and other natural hazards. There were four talks from the Facility Risk Group:
+
+* "Idaho National Laboratory Nuclear Safety Research Program"
+_Justin Coleman_
+* "Towards a Risk-Based, Cost-Optimized Design of Safety-Related Nuclear Structures and Facilities"
+_Chandu Bolisetti_
+* "Impact of Topographic Effects on Site Response at Nuclear Facility Sites"
+_Swetha Veeraraghavan_
+* "Preliminary Investigation of Effects of Sliding and Gapping Phenomena in Soil-Structure Interaction Modeling"
+_Efe Kurt_