diff --git a/.trash/17-09.md b/.trash/17-09.md
deleted file mode 100644
index 200a2ed..0000000
--- a/.trash/17-09.md
+++ /dev/null
@@ -1,17 +0,0 @@
-# Hysteresis 
-
-[ref](https://en.wikipedia.org/wiki/Hysteresis)
-
-the dependence of the state of a system on its history.
-
-# Hertz law
-
-[ref](https://www.sciencedirect.com/topics/engineering/hertz-theory)
-
-contact between two elastic solids
-
-# Newmark time integration
-
-[ref](https://www.sciencedirect.com/topics/engineering/newmark-method)
-
-a method of numerical integration used to solve certain differential equations.
diff --git a/.trash/2024-09-25.md b/.trash/2024-09-25.md
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/Drawing 2024-09-24 18.42.04.excalidraw.md b/.trash/Drawing 2024-09-24 18.42.04.excalidraw.md
deleted file mode 100644
index e921977..0000000
--- a/.trash/Drawing 2024-09-24 18.42.04.excalidraw.md	
+++ /dev/null
@@ -1,33 +0,0 @@
----
-
-excalidraw-plugin: parsed
-tags: [excalidraw]
-
----
-==⚠  Switch to EXCALIDRAW VIEW in the MORE OPTIONS menu of this document. ⚠== You can decompress Drawing data with the command palette: 'Decompress current Excalidraw file'. For more info check in plugin settings under 'Saving'
-
-
-# Excalidraw Data
-## Text Elements
-%%
-## Drawing
-```compressed-json
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-
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-
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-
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-
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-
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-
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-
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-
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-```
-%%
\ No newline at end of file
diff --git a/.trash/Passive Constrained Layer Damping.pdf.md b/.trash/Passive Constrained Layer Damping.pdf.md
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/Untitled 1.canvas b/.trash/Untitled 1.canvas
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/Untitled 2.canvas b/.trash/Untitled 2.canvas
deleted file mode 100644
index 9e26dfe..0000000
--- a/.trash/Untitled 2.canvas	
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file
diff --git a/.trash/Untitled 3.canvas b/.trash/Untitled 3.canvas
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/Untitled.canvas b/.trash/Untitled.canvas
deleted file mode 100644
index 9e26dfe..0000000
--- a/.trash/Untitled.canvas
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file
diff --git a/.trash/[[PCLD.md]].md b/.trash/[[PCLD.md]].md
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/[[PCLD]].md b/.trash/[[PCLD]].md
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/[passive.md b/.trash/[passive.md
deleted file mode 100644
index e69de29..0000000
diff --git a/.trash/accelerance.pdf b/.trash/accelerance.pdf
deleted file mode 100644
index 4a6fdab..0000000
Binary files a/.trash/accelerance.pdf and /dev/null differ
diff --git a/.trash/impact models.md b/.trash/impact models.md
deleted file mode 100644
index 51329e8..0000000
--- a/.trash/impact models.md	
+++ /dev/null
@@ -1,7 +0,0 @@
-[ref](https://doi.org/10.1016/S0263-8223(00)00138-0)
-
-There are 3 types of impact models :
-
-(1) energy-balance models, assume a quasi-static behavior of the structure; 
-(2) spring-mass models, account for the dynamics of the structure in a simplified manner; 
-(3) complete models, the dynamic behavior of the structure is fully modeled.
\ No newline at end of file
diff --git a/.trash/knowledge.md b/.trash/knowledge.md
deleted file mode 100644
index b05e1c5..0000000
--- a/.trash/knowledge.md
+++ /dev/null
@@ -1,183 +0,0 @@
----
-
-excalidraw-plugin: parsed
-tags: [excalidraw]
-
----
-==⚠  Switch to EXCALIDRAW VIEW in the MORE OPTIONS menu of this document. ⚠== You can decompress Drawing data with the command palette: 'Decompress current Excalidraw file'. For more info check in plugin settings under 'Saving'
-
-
-# Excalidraw Data
-## Text Elements
-study of shocks on composite laminate
-with an inserted viscoelastic layer ^WYlXieac
-
-Composite laminate models ^FH2DKKBS
-
-Impact Models ^hqaLafJy
-
-Layerwise ^8HpKHQA5
-
-Neo Hookean Behavior Law ^lh4BSpFy
-
-PCLD ^Bh7yIISX
-
-Viscoelasticity ^kBPOTOMw
-
-Zig-Zag ^YkLZ05BJ
-
-ESL ^GhrCORbU
-
-Continuum Mechanics ^zKTSPR69
-
-Accelerance ^ItclqVnw
-
-Finite element method ^OTn2g0f6
-
-Hertz Law ^m02F0WjR
-
-## Element Links
-WYlXieac: [[Article_Taylor_and_Francis_vfinal.pdf]]
-
-FH2DKKBS: [[Composite laminate models]]
-
-hqaLafJy: [[Impact Models]]
-
-8HpKHQA5: [[Layerwise Theories]]
-
-lh4BSpFy: [[Neo Hookean Behavior Law]]
-
-Bh7yIISX: [[PCLD]]
-
-kBPOTOMw: [[Viscoelasticity]]
-
-YkLZ05BJ: [[Zig-Zag Theories]]
-
-GhrCORbU: [[Equivalent Single Layer Theories]]
-
-zKTSPR69: [[Continuum Mechanics]]
-
-ItclqVnw: [[Accelerance]]
-
-OTn2g0f6: [[Finite element method]]
-
-m02F0WjR: [[Hertz Law]]
-
-%%
-## Drawing
-```compressed-json
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-
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-%%
\ No newline at end of file
diff --git a/.trash/passive constrained layer damping.md b/.trash/passive constrained layer damping.md
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diff --git a/.trash/passive constrained layer damping.pdf b/.trash/passive constrained layer damping.pdf
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diff --git a/.trash/passive.md b/.trash/passive.md
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diff --git a/.trash/pcld].md b/.trash/pcld].md
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